[WebAssembly] Adding 64-bit versions of all load & store ops.

[aardappel]

Summary

Context: https://github.com/WebAssembly/memory64/blob/master/proposals/memory64/Overview.md
This is just a first step, adding the new instruction variants while keeping the existing 32-bit functionality working.
Some of the basic load/store tests have new wasm64 versions that show that the basics of the target are working.
Further features need implementation, but these will be added in followups to keep things reviewable.

[aardappel]

finished initial tablegen changes

[aardappel]

fixed all type errors + more missing atomics

[aardappel]

it builds!

[aardappel]

Fixed test

[aardappel]

Made several tests pass under wasm64!

[dschuff]

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

62

side note: since we are about to start depending even more on the asm syntax, and having users try to use it, it's probably getting to now-or-never on this fix.

llvm/test/CodeGen/WebAssembly/cpus.ll

4

probably not to fix in this CL, but triple=wasm64 and -mcpu=mvp probably shouldn't be allowed.

llvm/test/CodeGen/WebAssembly/load-ext.ll

6

should the datalayout be removed here too?
I think it does make sense for many of these simple tests to use the target-defined datalayout (i.e. use the same IR for both 32 and 64) but we should be a bit careful with that, given that the frontend is going to generate actually-different IR for some cases.

llvm/test/MC/WebAssembly/wasm64.s

2

Are we able to check the encoding of the instructions yet? See e.g. https://github.com/llvm/llvm-project/blob/master/llvm/test/MC/WebAssembly/atomics-encodings.s

[aardappel]

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

62

Is this about swapping offset & align? I could do that in a next commit, though personally this doesn't sound important to me. @sbc100 opinion?

llvm/test/CodeGen/WebAssembly/cpus.ll

4

I was actually thinking about that, but looking at the code that deals with the cpu flags (in WebAssembly.cpp) and couldn't see a good place to error out on this. Maybe in setABI ?
Also, what should the default cpu be if someone selects wasm64 ?

llvm/test/CodeGen/WebAssembly/load-ext.ll

6

Yes, forgot to delete it here. I assumed it was better to rely on whatever is default for wasm32/64, but not familiar with under what conditions this could produce values other than the ones in datalayout.

llvm/test/MC/WebAssembly/wasm64.s

2

Yes, we should be able to add that to this test. Not sure what the point is though, since all load/store ops have exactly the same encoding as in wasm32.

Frankly, this test doesn't test anything, since the only thing that changes is that load/store now accept 64-bit operands. We need to test that those are being emitted by LLVM (which we don't test here), and that that combination is accepted by verifiers (which we also don't test here, the assembler doesn't verify types, and happily constructs illegal instruction sequences).

What is new here (and is currently commented out pending new reloc types) is i64.const label, but we can't check the encoding of that, since at the .o level it will just be all zeroes.

[aardappel]

Removed one more datalayout

[sbc100]

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp

95

Might be worth a separate case for fixup_sleb128_i64 since we know they can only be memory addresses.

And we probably want R_WASM_MEMORY_ADDR_SLEB64 and R_WASM_MEMORY_ADDR_I64 as new relocation types.

[dschuff]

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

62

Yes, it's about swapping offset and align. I don't have a strong opinion on that, other than that we should decide whether or not to do it, and remove/update the comment as applicable.

One argument for keeping things the same might be that offsets are much more common (at least when hand-writing) than alignments, and a format like <align>:<offset> might require an alignment when there otherwise might not need to be one.
Anyway, all of this dates back from when we just needed something "for now", even before we had the fully-stacked style and binary writer. So now's a good chance to revisit the design if we want.

llvm/test/CodeGen/WebAssembly/cpus.ll

4

yeah I guess the feature flags are a bit entangled in the CPU. If we can it would be good to error on any cpu setting (or feature flag setting) that doesn't support memory64.
my guess would be that the default cpu for wasm64 should just have the memory64 feature and no others. Not sure about the best place for the error (other than probably somewhere in clang). Perhaps @tlively has thought about this more recently than I have?

llvm/test/CodeGen/WebAssembly/load-ext.ll

6

In general everything should have an explicit datalayout chosen by the frontend (also the default datalayout for a target is AFAIK the same as what clang uses explicitly when there are no ABI-affecting cflags). But when there is no frontend and it's just tests, it gets a little more interesting, and it sometimes makes sense to have tests to double duty. I think it's fine to leave it out, as long as we are actually intending to run the test 2 different ways and we've verified that we are testing what we intend to test. Otherwise it should have an explicit datalayout just because it's a general default thing to do.

llvm/test/MC/WebAssembly/wasm64.s

2

Oh right I had forgotten that the encodings were all the same.

[aardappel]

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp

95

Yup, doing that in the follow-up, if that's ok.

[aheejin]

Question: Is this feature gonna be handled by -mtriple and not -mattrs like other features?

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

128

Patterns and instruction definitions in WebAssemblyInstrMemory.td are defined as multiclasses to group A32 and A64 versions. I think it's better to be consistent here too..? The same for all patterns and defs for atomic.wait, atomic.notify and AStoreOffset.

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

44

Nit: Can we set do reqs = [] as a default argument so we don't need [] in many cases below?

72

Requires only affects patterns and not instruction definitions. Not sure if it is Tablegen bug... So I think it's better to have Requires<HasAddr64> in patterns, here and others, like

multiclass LoadPatNoOffset<ValueType ty, PatFrag kind, string inst> {
  def : Pat<(ty (kind I32:$addr)), (!cast<NI>(inst # "_A32") 0, 0, I32:$addr)>;
  def : Pat<(ty (kind I64:$addr)), (!cast<NI>(inst # "_A64") 0, 0, I64:$addr)>, Requires<[HasAddr64]>;
}

The same for other patterns in this file, atomics and SIMD.

247

Don't we need reqs parameter and Requires<!listconcat(reqs, [HasAddr64])> here as in WebAssemblyLoad here?

But actually the funny thing is Requires doesn't work in instruction definitions.. Not sure if it's a Tablegen bug. We have them on definitions anyway, and I think it's ok, and and if we have them it's better to be consistent.

llvm/test/MC/WebAssembly/wasm64.s

107

If the only thing this file tests currently is whether LLVM accepts this file without an error, do we need to have these CHECK lines, which are the same as the original program? Roundtripping capability is tested in other files already. I might be mistaken, so please let me know if so.

[aardappel]

@aheejin yes, this is part of the triple, much like x86 vs x64. That structure was already in place before I started.

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

128

I tried to stay close to the original definitions. I do not feel the amount of duplication here is excessive to warrant trying to factor things out into more common definitions, given that trying to abstract things in tablegen leads to less readable results than in a normal programming language.

llvm/test/MC/WebAssembly/wasm64.s

107

Yes, the value of these CHECKs is low at the moment, but they check a little bit more than just the instruction being accepted, since they convert the instruction back to text. There is nothing in here that likely isn't covered by other tests, but that is hopefully changing soon.

[aardappel]

Added HasAddr64 to patterns, and made it default for instructions.

[aheejin]

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

128

I'm not sure the structure of original definition of these is different from that of InstrMemory.td. For ImmOff patterns, here we have

class WaitPatImmOff<ValueType ty, Intrinsic kind, PatFrag operand, NI inst> :    
  Pat<(i32 (kind (operand I32:$addr, imm:$off), ty:$exp, I64:$timeout)),         
      (inst 0, imm:$off, I32:$addr, ty:$exp, I64:$timeout)>;                     
def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, regPlusImm, ATOMIC_WAIT_I32>; 
def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, or_is_add, ATOMIC_WAIT_I32>;  
def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, regPlusImm, ATOMIC_WAIT_I64>; 
def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, or_is_add, ATOMIC_WAIT_I64>;

And in WebAssemblyInstrMemory.td we have

class LoadPatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :      
  Pat<(ty (kind (operand I32:$addr, imm:$off))), (inst 0, imm:$off, I32:$addr)>;                                                                             
def : LoadPatImmOff<i32, load, regPlusImm, LOAD_I32>;                            
def : LoadPatImmOff<i64, load, regPlusImm, LOAD_I64>;                            
def : LoadPatImmOff<f32, load, regPlusImm, LOAD_F32>;                            
def : LoadPatImmOff<f64, load, regPlusImm, LOAD_F64>;                            
...

And I don't think the amount of duplication is excessive either, but I suggested this more for consistency, because other patterns are grouped with multiclasses. BinRMW and TerRMW related patterns in this file are grouped as well, even though they have the same number of entries with these patterns.

[aardappel]

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

128

Agree it would be more consistent, but to make the change in this particular example requires doing instruction string concatenation (which I had to do in other cases to reduce the amount of duplication), whereas here it would just make things worse. I can make the change if you feel strongly about it, but I don't think it actually makes anything better.

[aheejin]

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

128

I don't know why string concatenation will be specially ugly only here, given that we are doing it everywhere else? Is there something I'm missing that something is different here? (And AStore patterns too)

I'm not sure what would be the reason for grouping multiclass in most of other patterns but not some of them, that's all. If the reason is there's not enough entries, BinRMW and BinTer have the same number of entries with this one too.

[aardappel]

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

128

Just looked if I could make this happen.

Making ATOMIC_I generate 2 variants is not as easy as for WebAssembyLoad, since it takes full dag arguments, which have several components that would have to be replaced with !subst or whatever.. this would get tricky.

Adding a multi-class just for every pair of instructions would actually make the code bigger, and certainly less readable.

For the patterns, you're looking at changing this:

class WaitPatNoOffset<ValueType ty, Intrinsic kind, WebAssemblyRegClass rc,
                      NI inst> :
  Pat<(i32 (kind rc:$addr, ty:$exp, I64:$timeout)),
      (inst 0, 0, rc:$addr, ty:$exp, I64:$timeout)>;
def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I32, ATOMIC_WAIT_I32_A32>;
def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I32, ATOMIC_WAIT_I64_A32>;
def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I32, ATOMIC_WAIT_I32_A32>;
def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I32, ATOMIC_WAIT_I64_A32>;
def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I64, ATOMIC_WAIT_I32_A64>;
def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I64, ATOMIC_WAIT_I64_A64>;
def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I64, ATOMIC_WAIT_I32_A64>;
def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I64, ATOMIC_WAIT_I64_A64>;

into:

multiclass WaitPatNoOffset<ValueType ty, Intrinsic kind,
                      string inst> {
  def : Pat<(i32 (kind I32:$addr, ty:$exp, I64:$timeout)),
            (!cast<NI>(inst#_A32) 0, 0, I32:$addr, ty:$exp, I64:$timeout)>;
  def : Pat<(i32 (kind I64:$addr, ty:$exp, I64:$timeout)),
            (!cast<NI>(inst#_A64) 0, 0, I64:$addr, ty:$exp, I64:$timeout)>;
}
defm : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, "ATOMIC_WAIT_I32">;
defm : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, "ATOMIC_WAIT_I64">;
defm : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, "ATOMIC_WAIT_I32">;
defm : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, "ATOMIC_WAIT_I64">;

If you think that is better, I'll go make similar changes below.

[aheejin]

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

128

(Chatted offline and posting the summary here) I meant grouping patterns, and wasn't talking about making two variants of ATOMIC_I with dags and everything. This CL makes grouped patterns in WebAssemblyInstrSIMD.td but doesn't touch SIMD_I itself. That's what I meant in this file too.

[aardappel]

Refactored atomic patterns

[aheejin]

Some lines in WebAssemblyInstrAtomics.td and WebAssemblyInstrSIMD.td look they exceed 80 cols, so please fix that too :)

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

118

These two patterns are still ungrouped..

[aardappel]

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

118

introducing a similar structure to the patterns below for these would create a multiclass with 2 patterns only called once, which is strictly worse than what is here

[aardappel]

80-column wrapping

[tlively]

llvm/test/CodeGen/WebAssembly/cpus.ll

4

We have a bunch of errors for incompatible features and options in the driver code in clang already. That would probably be a good place for these checks, too.

As for the default cpu for the wasm64 triple, we could either do a cpu with 64-bit memory and no other features like mvp, or we could do a cpu that has 65-bit memory and all the small features that were standardized and widely implemented before it. Since there aren't many such features right now, though, I guess an mvp-like mvp64 cpu would be best for now.

[aardappel]

llvm/test/CodeGen/WebAssembly/cpus.ll

4

Ok, where do I add this? :) Maybe ok as a followup?

[aardappel]

Added HasAddr32|64 to all the patterns.

[dschuff]

I think this is good now. If the Requires I mentioned above should actually go back in, it can be in a followup CL (presumably where we add MEMORY_SIZE_I64 and friends).

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

360

Question for the tblgen experts maybe, if a def has both an instruction definition and a pattern as this one does, does the Requires field actually apply to the pattern? Or does Requires only work for freestanding patterns?

llvm/test/CodeGen/WebAssembly/cpus.ll

4

oh and yes, I think it's fine for a followup and i mentioned above.

[tlively]

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

360

I would have thought that Requires should apply to both kinds of patterns. In particular, inheriting it just sets the Predicates field in both Instruction and Pattern. But I read @aheejin's comment above to mean that this doesn't work after all, so perhaps I am wrong.

[aheejin]

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

360

Yes not sure if it's an intended behavior or a bug of TableGen, but what I observed is predicates only work on patterns and not on definitions. Actually @dschuff confirmed that to me when I was confused and asked him :)

lld/test/wasm/lto/cache.ll

 ; RUN: opt -module-hash -module-summary %s -o %t.o
 ; RUN: opt -module-hash -module-summary %p/Inputs/cache.ll -o %t2.o
 ; NetBSD: noatime mounts currently inhibit 'touch' from updating atime
-; UNSUPPORTED: system-netbsd
+; Windows: no 'touch' command.
+; UNSUPPORTED: system-netbsd, system-windows
 
 ; RUN: rm -Rf %t.cache && mkdir %t.cache
 ; Create two files that would be removed by cache pruning due to age.
 ; We should only remove files matching the pattern "llvmcache-*".
 ; RUN: touch -t 197001011200 %t.cache/llvmcache-foo %t.cache/foo
 ; RUN: wasm-ld --thinlto-cache-dir=%t.cache --thinlto-cache-policy prune_after=1h:prune_interval=0s -o %t.wasm %t2.o %t.o
 
 ; Two cached objects, plus a timestamp file and "foo", minus the file we removed.

llvm/lib/Target/WebAssembly/Disassembler/WebAssemblyDisassembler.cpp

for (uint8_t OPI = 0; OPI < WasmInst->NumOperands; OPI++) {
     auto OT = OperandTable[WasmInst->OperandStart + OPI];
     switch (OT) {
     // ULEB operands:
     case WebAssembly::OPERAND_BASIC_BLOCK:
     case WebAssembly::OPERAND_LOCAL:
     case WebAssembly::OPERAND_GLOBAL:
     case WebAssembly::OPERAND_FUNCTION32:
     case WebAssembly::OPERAND_OFFSET32:
+    case WebAssembly::OPERAND_OFFSET64:
     case WebAssembly::OPERAND_P2ALIGN:
     case WebAssembly::OPERAND_TYPEINDEX:
     case WebAssembly::OPERAND_EVENT:
     case MCOI::OPERAND_IMMEDIATE: {
       if (!parseLEBImmediate(MI, Size, Bytes, false))
         return MCDisassembler::Fail;
       break;
     }

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyAsmBackend.cpp

WebAssemblyAsmBackend::getFixupKindInfo(MCFixupKind Kind) const {
   const static MCFixupKindInfo Infos[WebAssembly::NumTargetFixupKinds] = {
       // This table *must* be in the order that the fixup_* kinds are defined in
       // WebAssemblyFixupKinds.h.
       //
       // Name                     Offset (bits) Size (bits)     Flags
       {"fixup_sleb128_i32", 0, 5 * 8, 0},
       {"fixup_sleb128_i64", 0, 10 * 8, 0},
       {"fixup_uleb128_i32", 0, 5 * 8, 0},
+      {"fixup_uleb128_i64", 0, 10 * 8, 0},
   };
 
   if (Kind < FirstTargetFixupKind)
     return MCAsmBackend::getFixupKindInfo(Kind);
 
   assert(unsigned(Kind - FirstTargetFixupKind) < getNumFixupKinds() &&
          "Invalid kind!");
   return Infos[Kind - FirstTargetFixupKind];

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyFixupKinds.h

 #include "llvm/MC/MCFixup.h"
 
 namespace llvm {
 namespace WebAssembly {
 enum Fixups {
   fixup_sleb128_i32 = FirstTargetFixupKind, // 32-bit signed
   fixup_sleb128_i64,                        // 64-bit signed
   fixup_uleb128_i32,                        // 32-bit unsigned
+  fixup_uleb128_i64,                        // 64-bit unsigned
 
   // Marker
   LastTargetFixupKind,
   NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind
 };
 } // end namespace WebAssembly
 } // end namespace llvm
 
 #endif

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCCodeEmitter.cpp

if (MO.isReg()) {
           encodeSLEB128(int32_t(MO.getImm()), OS);
           break;
         case WebAssembly::OPERAND_OFFSET32:
           encodeULEB128(uint32_t(MO.getImm()), OS);
           break;
         case WebAssembly::OPERAND_I64IMM:
           encodeSLEB128(int64_t(MO.getImm()), OS);
           break;
+        case WebAssembly::OPERAND_OFFSET64:
+          encodeULEB128(uint64_t(MO.getImm()), OS);
+          break;
         case WebAssembly::OPERAND_SIGNATURE:
           OS << uint8_t(MO.getImm());
           break;
         case WebAssembly::OPERAND_VEC_I8IMM:
           support::endian::write<uint8_t>(OS, MO.getImm(), support::little);
           break;
         case WebAssembly::OPERAND_VEC_I16IMM:
           support::endian::write<uint16_t>(OS, MO.getImm(), support::little);
if (MO.isReg()) {
       case WebAssembly::OPERAND_FUNCTION32:
       case WebAssembly::OPERAND_OFFSET32:
       case WebAssembly::OPERAND_SIGNATURE:
       case WebAssembly::OPERAND_TYPEINDEX:
       case WebAssembly::OPERAND_GLOBAL:
       case WebAssembly::OPERAND_EVENT:
         FixupKind = MCFixupKind(WebAssembly::fixup_uleb128_i32);
         break;
+      case WebAssembly::OPERAND_OFFSET64:
+        FixupKind = MCFixupKind(WebAssembly::fixup_uleb128_i64);
+        break;
       default:
         llvm_unreachable("unexpected symbolic operand kind");
       }
       Fixups.push_back(MCFixup::create(OS.tell() - Start, MO.getExpr(),
                                        FixupKind, MI.getLoc()));
       ++MCNumFixups;
       encodeULEB128(0, OS, PaddedSize);
     } else {
       llvm_unreachable("unexpected operand kind");
     }
   }
 
   ++MCNumEmitted; // Keep track of the # of mi's emitted.
 }
 
 #include "WebAssemblyGenMCCodeEmitter.inc"

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCTargetDesc.h

enum OperandType {
   /// 32-bit vector lane immediate
   OPERAND_VEC_I32IMM,
   /// 64-bit vector lane immediate
   OPERAND_VEC_I64IMM,
   /// 32-bit unsigned function indices.
   OPERAND_FUNCTION32,
   /// 32-bit unsigned memory offsets.
   OPERAND_OFFSET32,
+  /// 64-bit unsigned memory offsets.
+  OPERAND_OFFSET64,
   /// p2align immediate for load and store address alignment.
   OPERAND_P2ALIGN,
   /// signature immediate for block/loop.
   OPERAND_SIGNATURE,
   /// type signature immediate for call_indirect.
   OPERAND_TYPEINDEX,
   /// Event index.
   OPERAND_EVENT,

 static const unsigned Nop = 0x01;
 static const unsigned End = 0x0b;
 
 wasm::ValType toValType(const MVT &Ty);
 
 /// Return the default p2align value for a load or store with the given opcode.
 inline unsigned GetDefaultP2AlignAny(unsigned Opc) {
   switch (Opc) {
-  case WebAssembly::LOAD8_S_I32:
-  case WebAssembly::LOAD8_S_I32_S:
-  case WebAssembly::LOAD8_U_I32:
-  case WebAssembly::LOAD8_U_I32_S:
-  case WebAssembly::LOAD8_S_I64:
-  case WebAssembly::LOAD8_S_I64_S:
-  case WebAssembly::LOAD8_U_I64:
-  case WebAssembly::LOAD8_U_I64_S:
-  case WebAssembly::ATOMIC_LOAD8_U_I32:
-  case WebAssembly::ATOMIC_LOAD8_U_I32_S:
-  case WebAssembly::ATOMIC_LOAD8_U_I64:
-  case WebAssembly::ATOMIC_LOAD8_U_I64_S:
-  case WebAssembly::STORE8_I32:
-  case WebAssembly::STORE8_I32_S:
-  case WebAssembly::STORE8_I64:
-  case WebAssembly::STORE8_I64_S:
-  case WebAssembly::ATOMIC_STORE8_I32:
-  case WebAssembly::ATOMIC_STORE8_I32_S:
-  case WebAssembly::ATOMIC_STORE8_I64:
-  case WebAssembly::ATOMIC_STORE8_I64_S:
-  case WebAssembly::ATOMIC_RMW8_U_ADD_I32:
-  case WebAssembly::ATOMIC_RMW8_U_ADD_I32_S:
-  case WebAssembly::ATOMIC_RMW8_U_ADD_I64:
-  case WebAssembly::ATOMIC_RMW8_U_ADD_I64_S:
-  case WebAssembly::ATOMIC_RMW8_U_SUB_I32:
-  case WebAssembly::ATOMIC_RMW8_U_SUB_I32_S:
-  case WebAssembly::ATOMIC_RMW8_U_SUB_I64:
-  case WebAssembly::ATOMIC_RMW8_U_SUB_I64_S:
-  case WebAssembly::ATOMIC_RMW8_U_AND_I32:
-  case WebAssembly::ATOMIC_RMW8_U_AND_I32_S:
-  case WebAssembly::ATOMIC_RMW8_U_AND_I64:
-  case WebAssembly::ATOMIC_RMW8_U_AND_I64_S:
-  case WebAssembly::ATOMIC_RMW8_U_OR_I32:
-  case WebAssembly::ATOMIC_RMW8_U_OR_I32_S:
-  case WebAssembly::ATOMIC_RMW8_U_OR_I64:
-  case WebAssembly::ATOMIC_RMW8_U_OR_I64_S:
-  case WebAssembly::ATOMIC_RMW8_U_XOR_I32:
-  case WebAssembly::ATOMIC_RMW8_U_XOR_I32_S:
-  case WebAssembly::ATOMIC_RMW8_U_XOR_I64:
-  case WebAssembly::ATOMIC_RMW8_U_XOR_I64_S:
-  case WebAssembly::ATOMIC_RMW8_U_XCHG_I32:
-  case WebAssembly::ATOMIC_RMW8_U_XCHG_I32_S:
-  case WebAssembly::ATOMIC_RMW8_U_XCHG_I64:
-  case WebAssembly::ATOMIC_RMW8_U_XCHG_I64_S:
-  case WebAssembly::ATOMIC_RMW8_U_CMPXCHG_I32:
-  case WebAssembly::ATOMIC_RMW8_U_CMPXCHG_I32_S:
-  case WebAssembly::ATOMIC_RMW8_U_CMPXCHG_I64:
-  case WebAssembly::ATOMIC_RMW8_U_CMPXCHG_I64_S:
-  case WebAssembly::LOAD_SPLAT_v8x16:
-  case WebAssembly::LOAD_SPLAT_v8x16_S:
+#define WASM_LOAD_STORE(NAME) \
+  case WebAssembly::NAME##_A32: \
+  case WebAssembly::NAME##_A64: \
+  case WebAssembly::NAME##_A32_S: \
+  case WebAssembly::NAME##_A64_S:
+  WASM_LOAD_STORE(LOAD8_S_I32)
+  WASM_LOAD_STORE(LOAD8_U_I32)
+  WASM_LOAD_STORE(LOAD8_S_I64)
+  WASM_LOAD_STORE(LOAD8_U_I64)
+  WASM_LOAD_STORE(ATOMIC_LOAD8_U_I32)
+  WASM_LOAD_STORE(ATOMIC_LOAD8_U_I64)
+  WASM_LOAD_STORE(STORE8_I32)
+  WASM_LOAD_STORE(STORE8_I64)
+  WASM_LOAD_STORE(ATOMIC_STORE8_I32)
+  WASM_LOAD_STORE(ATOMIC_STORE8_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_ADD_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_ADD_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_SUB_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_SUB_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_AND_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_AND_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_OR_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_OR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_XOR_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_XOR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_XCHG_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_XCHG_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_CMPXCHG_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW8_U_CMPXCHG_I64)
+  WASM_LOAD_STORE(LOAD_SPLAT_v8x16)
     return 0;
-  case WebAssembly::LOAD16_S_I32:
-  case WebAssembly::LOAD16_S_I32_S:
-  case WebAssembly::LOAD16_U_I32:
-  case WebAssembly::LOAD16_U_I32_S:
-  case WebAssembly::LOAD16_S_I64:
-  case WebAssembly::LOAD16_S_I64_S:
-  case WebAssembly::LOAD16_U_I64:
-  case WebAssembly::LOAD16_U_I64_S:
-  case WebAssembly::ATOMIC_LOAD16_U_I32:
-  case WebAssembly::ATOMIC_LOAD16_U_I32_S:
-  case WebAssembly::ATOMIC_LOAD16_U_I64:
-  case WebAssembly::ATOMIC_LOAD16_U_I64_S:
-  case WebAssembly::STORE16_I32:
-  case WebAssembly::STORE16_I32_S:
-  case WebAssembly::STORE16_I64:
-  case WebAssembly::STORE16_I64_S:
-  case WebAssembly::ATOMIC_STORE16_I32:
-  case WebAssembly::ATOMIC_STORE16_I32_S:
-  case WebAssembly::ATOMIC_STORE16_I64:
-  case WebAssembly::ATOMIC_STORE16_I64_S:
-  case WebAssembly::ATOMIC_RMW16_U_ADD_I32:
-  case WebAssembly::ATOMIC_RMW16_U_ADD_I32_S:
-  case WebAssembly::ATOMIC_RMW16_U_ADD_I64:
-  case WebAssembly::ATOMIC_RMW16_U_ADD_I64_S:
-  case WebAssembly::ATOMIC_RMW16_U_SUB_I32:
-  case WebAssembly::ATOMIC_RMW16_U_SUB_I32_S:
-  case WebAssembly::ATOMIC_RMW16_U_SUB_I64:
-  case WebAssembly::ATOMIC_RMW16_U_SUB_I64_S:
-  case WebAssembly::ATOMIC_RMW16_U_AND_I32:
-  case WebAssembly::ATOMIC_RMW16_U_AND_I32_S:
-  case WebAssembly::ATOMIC_RMW16_U_AND_I64:
-  case WebAssembly::ATOMIC_RMW16_U_AND_I64_S:
-  case WebAssembly::ATOMIC_RMW16_U_OR_I32:
-  case WebAssembly::ATOMIC_RMW16_U_OR_I32_S:
-  case WebAssembly::ATOMIC_RMW16_U_OR_I64:
-  case WebAssembly::ATOMIC_RMW16_U_OR_I64_S:
-  case WebAssembly::ATOMIC_RMW16_U_XOR_I32:
-  case WebAssembly::ATOMIC_RMW16_U_XOR_I32_S:
-  case WebAssembly::ATOMIC_RMW16_U_XOR_I64:
-  case WebAssembly::ATOMIC_RMW16_U_XOR_I64_S:
-  case WebAssembly::ATOMIC_RMW16_U_XCHG_I32:
-  case WebAssembly::ATOMIC_RMW16_U_XCHG_I32_S:
-  case WebAssembly::ATOMIC_RMW16_U_XCHG_I64:
-  case WebAssembly::ATOMIC_RMW16_U_XCHG_I64_S:
-  case WebAssembly::ATOMIC_RMW16_U_CMPXCHG_I32:
-  case WebAssembly::ATOMIC_RMW16_U_CMPXCHG_I32_S:
-  case WebAssembly::ATOMIC_RMW16_U_CMPXCHG_I64:
-  case WebAssembly::ATOMIC_RMW16_U_CMPXCHG_I64_S:
-  case WebAssembly::LOAD_SPLAT_v16x8:
-  case WebAssembly::LOAD_SPLAT_v16x8_S:
+  WASM_LOAD_STORE(LOAD16_S_I32)
+  WASM_LOAD_STORE(LOAD16_U_I32)
+  WASM_LOAD_STORE(LOAD16_S_I64)
+  WASM_LOAD_STORE(LOAD16_U_I64)
+  WASM_LOAD_STORE(ATOMIC_LOAD16_U_I32)
+  WASM_LOAD_STORE(ATOMIC_LOAD16_U_I64)
+  WASM_LOAD_STORE(STORE16_I32)
+  WASM_LOAD_STORE(STORE16_I64)
+  WASM_LOAD_STORE(ATOMIC_STORE16_I32)
+  WASM_LOAD_STORE(ATOMIC_STORE16_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_ADD_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_ADD_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_SUB_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_SUB_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_AND_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_AND_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_OR_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_OR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_XOR_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_XOR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_XCHG_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_XCHG_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_CMPXCHG_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW16_U_CMPXCHG_I64)
+  WASM_LOAD_STORE(LOAD_SPLAT_v16x8)
     return 1;
-  case WebAssembly::LOAD_I32:
-  case WebAssembly::LOAD_I32_S:
-  case WebAssembly::LOAD_F32:
-  case WebAssembly::LOAD_F32_S:
-  case WebAssembly::STORE_I32:
-  case WebAssembly::STORE_I32_S:
-  case WebAssembly::STORE_F32:
-  case WebAssembly::STORE_F32_S:
-  case WebAssembly::LOAD32_S_I64:
-  case WebAssembly::LOAD32_S_I64_S:
-  case WebAssembly::LOAD32_U_I64:
-  case WebAssembly::LOAD32_U_I64_S:
-  case WebAssembly::STORE32_I64:
-  case WebAssembly::STORE32_I64_S:
-  case WebAssembly::ATOMIC_LOAD_I32:
-  case WebAssembly::ATOMIC_LOAD_I32_S:
-  case WebAssembly::ATOMIC_LOAD32_U_I64:
-  case WebAssembly::ATOMIC_LOAD32_U_I64_S:
-  case WebAssembly::ATOMIC_STORE_I32:
-  case WebAssembly::ATOMIC_STORE_I32_S:
-  case WebAssembly::ATOMIC_STORE32_I64:
-  case WebAssembly::ATOMIC_STORE32_I64_S:
-  case WebAssembly::ATOMIC_RMW_ADD_I32:
-  case WebAssembly::ATOMIC_RMW_ADD_I32_S:
-  case WebAssembly::ATOMIC_RMW32_U_ADD_I64:
-  case WebAssembly::ATOMIC_RMW32_U_ADD_I64_S:
-  case WebAssembly::ATOMIC_RMW_SUB_I32:
-  case WebAssembly::ATOMIC_RMW_SUB_I32_S:
-  case WebAssembly::ATOMIC_RMW32_U_SUB_I64:
-  case WebAssembly::ATOMIC_RMW32_U_SUB_I64_S:
-  case WebAssembly::ATOMIC_RMW_AND_I32:
-  case WebAssembly::ATOMIC_RMW_AND_I32_S:
-  case WebAssembly::ATOMIC_RMW32_U_AND_I64:
-  case WebAssembly::ATOMIC_RMW32_U_AND_I64_S:
-  case WebAssembly::ATOMIC_RMW_OR_I32:
-  case WebAssembly::ATOMIC_RMW_OR_I32_S:
-  case WebAssembly::ATOMIC_RMW32_U_OR_I64:
-  case WebAssembly::ATOMIC_RMW32_U_OR_I64_S:
-  case WebAssembly::ATOMIC_RMW_XOR_I32:
-  case WebAssembly::ATOMIC_RMW_XOR_I32_S:
-  case WebAssembly::ATOMIC_RMW32_U_XOR_I64:
-  case WebAssembly::ATOMIC_RMW32_U_XOR_I64_S:
-  case WebAssembly::ATOMIC_RMW_XCHG_I32:
-  case WebAssembly::ATOMIC_RMW_XCHG_I32_S:
-  case WebAssembly::ATOMIC_RMW32_U_XCHG_I64:
-  case WebAssembly::ATOMIC_RMW32_U_XCHG_I64_S:
-  case WebAssembly::ATOMIC_RMW_CMPXCHG_I32:
-  case WebAssembly::ATOMIC_RMW_CMPXCHG_I32_S:
-  case WebAssembly::ATOMIC_RMW32_U_CMPXCHG_I64:
-  case WebAssembly::ATOMIC_RMW32_U_CMPXCHG_I64_S:
-  case WebAssembly::ATOMIC_NOTIFY:
-  case WebAssembly::ATOMIC_NOTIFY_S:
-  case WebAssembly::ATOMIC_WAIT_I32:
-  case WebAssembly::ATOMIC_WAIT_I32_S:
-  case WebAssembly::LOAD_SPLAT_v32x4:
-  case WebAssembly::LOAD_SPLAT_v32x4_S:
+  WASM_LOAD_STORE(LOAD_I32)
+  WASM_LOAD_STORE(LOAD_F32)
+  WASM_LOAD_STORE(STORE_I32)
+  WASM_LOAD_STORE(STORE_F32)
+  WASM_LOAD_STORE(LOAD32_S_I64)
+  WASM_LOAD_STORE(LOAD32_U_I64)
+  WASM_LOAD_STORE(STORE32_I64)
+  WASM_LOAD_STORE(ATOMIC_LOAD_I32)
+  WASM_LOAD_STORE(ATOMIC_LOAD32_U_I64)
+  WASM_LOAD_STORE(ATOMIC_STORE_I32)
+  WASM_LOAD_STORE(ATOMIC_STORE32_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_ADD_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW32_U_ADD_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_SUB_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW32_U_SUB_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_AND_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW32_U_AND_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_OR_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW32_U_OR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_XOR_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW32_U_XOR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_XCHG_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW32_U_XCHG_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_CMPXCHG_I32)
+  WASM_LOAD_STORE(ATOMIC_RMW32_U_CMPXCHG_I64)
+  WASM_LOAD_STORE(ATOMIC_NOTIFY)
+  WASM_LOAD_STORE(ATOMIC_WAIT_I32)
+  WASM_LOAD_STORE(LOAD_SPLAT_v32x4)
     return 2;
-  case WebAssembly::LOAD_I64:
-  case WebAssembly::LOAD_I64_S:
-  case WebAssembly::LOAD_F64:
-  case WebAssembly::LOAD_F64_S:
-  case WebAssembly::STORE_I64:
-  case WebAssembly::STORE_I64_S:
-  case WebAssembly::STORE_F64:
-  case WebAssembly::STORE_F64_S:
-  case WebAssembly::ATOMIC_LOAD_I64:
-  case WebAssembly::ATOMIC_LOAD_I64_S:
-  case WebAssembly::ATOMIC_STORE_I64:
-  case WebAssembly::ATOMIC_STORE_I64_S:
-  case WebAssembly::ATOMIC_RMW_ADD_I64:
-  case WebAssembly::ATOMIC_RMW_ADD_I64_S:
-  case WebAssembly::ATOMIC_RMW_SUB_I64:
-  case WebAssembly::ATOMIC_RMW_SUB_I64_S:
-  case WebAssembly::ATOMIC_RMW_AND_I64:
-  case WebAssembly::ATOMIC_RMW_AND_I64_S:
-  case WebAssembly::ATOMIC_RMW_OR_I64:
-  case WebAssembly::ATOMIC_RMW_OR_I64_S:
-  case WebAssembly::ATOMIC_RMW_XOR_I64:
-  case WebAssembly::ATOMIC_RMW_XOR_I64_S:
-  case WebAssembly::ATOMIC_RMW_XCHG_I64:
-  case WebAssembly::ATOMIC_RMW_XCHG_I64_S:
-  case WebAssembly::ATOMIC_RMW_CMPXCHG_I64:
-  case WebAssembly::ATOMIC_RMW_CMPXCHG_I64_S:
-  case WebAssembly::ATOMIC_WAIT_I64:
-  case WebAssembly::ATOMIC_WAIT_I64_S:
-  case WebAssembly::LOAD_SPLAT_v64x2:
-  case WebAssembly::LOAD_SPLAT_v64x2_S:
-  case WebAssembly::LOAD_EXTEND_S_v8i16:
-  case WebAssembly::LOAD_EXTEND_S_v8i16_S:
-  case WebAssembly::LOAD_EXTEND_U_v8i16:
-  case WebAssembly::LOAD_EXTEND_U_v8i16_S:
-  case WebAssembly::LOAD_EXTEND_S_v4i32:
-  case WebAssembly::LOAD_EXTEND_S_v4i32_S:
-  case WebAssembly::LOAD_EXTEND_U_v4i32:
-  case WebAssembly::LOAD_EXTEND_U_v4i32_S:
-  case WebAssembly::LOAD_EXTEND_S_v2i64:
-  case WebAssembly::LOAD_EXTEND_S_v2i64_S:
-  case WebAssembly::LOAD_EXTEND_U_v2i64:
-  case WebAssembly::LOAD_EXTEND_U_v2i64_S:
+  WASM_LOAD_STORE(LOAD_I64)
+  WASM_LOAD_STORE(LOAD_F64)
+  WASM_LOAD_STORE(STORE_I64)
+  WASM_LOAD_STORE(STORE_F64)
+  WASM_LOAD_STORE(ATOMIC_LOAD_I64)
+  WASM_LOAD_STORE(ATOMIC_STORE_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_ADD_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_SUB_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_AND_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_OR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_XOR_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_XCHG_I64)
+  WASM_LOAD_STORE(ATOMIC_RMW_CMPXCHG_I64)
+  WASM_LOAD_STORE(ATOMIC_WAIT_I64)
+  WASM_LOAD_STORE(LOAD_SPLAT_v64x2)
+  WASM_LOAD_STORE(LOAD_EXTEND_S_v8i16)
+  WASM_LOAD_STORE(LOAD_EXTEND_U_v8i16)
+  WASM_LOAD_STORE(LOAD_EXTEND_S_v4i32)
+  WASM_LOAD_STORE(LOAD_EXTEND_U_v4i32)
+  WASM_LOAD_STORE(LOAD_EXTEND_S_v2i64)
+  WASM_LOAD_STORE(LOAD_EXTEND_U_v2i64)
     return 3;
-  case WebAssembly::LOAD_V128:
-  case WebAssembly::LOAD_V128_S:
-  case WebAssembly::STORE_V128:
-  case WebAssembly::STORE_V128_S:
+  WASM_LOAD_STORE(LOAD_V128)
+  WASM_LOAD_STORE(STORE_V128)
     return 4;
   default:
     return -1;
   }
+#undef WASM_LOAD_STORE
 }
 
 inline unsigned GetDefaultP2Align(unsigned Opc) {
   auto Align = GetDefaultP2AlignAny(Opc);
   if (Align == -1U) {
     llvm_unreachable("Only loads and stores have p2align values");
   }
   return Align;

llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp

switch (Modifier) {
     case MCSymbolRefExpr::VK_WASM_TYPEINDEX:
       return wasm::R_WASM_TYPE_INDEX_LEB;
     default:
       break;
   }
 
   switch (unsigned(Fixup.getKind())) {
   case WebAssembly::fixup_sleb128_i32:
+  case WebAssembly::fixup_sleb128_i64:
     if (SymA.isFunction())
       return wasm::R_WASM_TABLE_INDEX_SLEB;
     return wasm::R_WASM_MEMORY_ADDR_SLEB;
-  case WebAssembly::fixup_sleb128_i64:
-    llvm_unreachable("fixup_sleb128_i64 not implemented yet");
   case WebAssembly::fixup_uleb128_i32:
+  case WebAssembly::fixup_uleb128_i64:
     if (SymA.isGlobal())
       return wasm::R_WASM_GLOBAL_INDEX_LEB;
     if (SymA.isFunction())
       return wasm::R_WASM_FUNCTION_INDEX_LEB;
     if (SymA.isEvent())
       return wasm::R_WASM_EVENT_INDEX_LEB;
     return wasm::R_WASM_MEMORY_ADDR_LEB;
   case FK_Data_4:

llvm/lib/Target/WebAssembly/WebAssemblyFastISel.cpp

bool WebAssemblyFastISel::selectLoad(const Instruction *I) {
   Address Addr;
   if (!computeAddress(Load->getPointerOperand(), Addr))
     return false;
 
   // TODO: Fold a following sign-/zero-extend into the load instruction.
 
   unsigned Opc;
   const TargetRegisterClass *RC;
+  bool A64 = Subtarget->hasAddr64();
   switch (getSimpleType(Load->getType())) {
   case MVT::i1:
   case MVT::i8:
-    Opc = WebAssembly::LOAD8_U_I32;
+    Opc = A64 ? WebAssembly::LOAD8_U_I32_A64 : WebAssembly::LOAD8_U_I32_A32;
     RC = &WebAssembly::I32RegClass;
     break;
   case MVT::i16:
-    Opc = WebAssembly::LOAD16_U_I32;
+    Opc = A64 ? WebAssembly::LOAD16_U_I32_A64 : WebAssembly::LOAD16_U_I32_A32;
     RC = &WebAssembly::I32RegClass;
     break;
   case MVT::i32:
-    Opc = WebAssembly::LOAD_I32;
+    Opc = A64 ? WebAssembly::LOAD_I32_A64 : WebAssembly::LOAD_I32_A32;
     RC = &WebAssembly::I32RegClass;
     break;
   case MVT::i64:
-    Opc = WebAssembly::LOAD_I64;
+    Opc = A64 ? WebAssembly::LOAD_I64_A64 : WebAssembly::LOAD_I64_A32;
     RC = &WebAssembly::I64RegClass;
     break;
   case MVT::f32:
-    Opc = WebAssembly::LOAD_F32;
+    Opc = A64 ? WebAssembly::LOAD_F32_A64 : WebAssembly::LOAD_F32_A32;
     RC = &WebAssembly::F32RegClass;
     break;
   case MVT::f64:
-    Opc = WebAssembly::LOAD_F64;
+    Opc = A64 ? WebAssembly::LOAD_F64_A64 : WebAssembly::LOAD_F64_A32;
     RC = &WebAssembly::F64RegClass;
     break;
   default:
     return false;
   }
 
   materializeLoadStoreOperands(Addr);
 
if (!Subtarget->hasSIMD128() &&
     return false;
 
   Address Addr;
   if (!computeAddress(Store->getPointerOperand(), Addr))
     return false;
 
   unsigned Opc;
   bool VTIsi1 = false;
+  bool A64 = Subtarget->hasAddr64();
   switch (getSimpleType(Store->getValueOperand()->getType())) {
   case MVT::i1:
     VTIsi1 = true;
     LLVM_FALLTHROUGH;
   case MVT::i8:
-    Opc = WebAssembly::STORE8_I32;
+    Opc = A64 ? WebAssembly::STORE8_I32_A64 : WebAssembly::STORE8_I32_A32;
     break;
   case MVT::i16:
-    Opc = WebAssembly::STORE16_I32;
+    Opc = A64 ? WebAssembly::STORE16_I32_A64 : WebAssembly::STORE16_I32_A32;
     break;
   case MVT::i32:
-    Opc = WebAssembly::STORE_I32;
+    Opc = A64 ? WebAssembly::STORE_I32_A64 : WebAssembly::STORE_I32_A32;
     break;
   case MVT::i64:
-    Opc = WebAssembly::STORE_I64;
+    Opc = A64 ? WebAssembly::STORE_I64_A64 : WebAssembly::STORE_I64_A32;
     break;
   case MVT::f32:
-    Opc = WebAssembly::STORE_F32;
+    Opc = A64 ? WebAssembly::STORE_F32_A64 : WebAssembly::STORE_F32_A32;
     break;
   case MVT::f64:
-    Opc = WebAssembly::STORE_F64;
+    Opc = A64 ? WebAssembly::STORE_F64_A64 : WebAssembly::STORE_F64_A32;
     break;
   default:
     return false;
   }
 
   materializeLoadStoreOperands(Addr);
 
   unsigned ValueReg = getRegForValue(Store->getValueOperand());

llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp

public:
 
   bool runOnMachineFunction(MachineFunction &MF) override {
     LLVM_DEBUG(dbgs() << "********** ISelDAGToDAG **********\n"
                          "********** Function: "
                       << MF.getName() << '\n');
 
     Subtarget = &MF.getSubtarget<WebAssemblySubtarget>();
 
-    // Wasm64 is not fully supported right now (and is not specified)
-    if (Subtarget->hasAddr64())
-      report_fatal_error(
-          "64-bit WebAssembly (wasm64) is not currently supported");
-
     return SelectionDAGISel::runOnMachineFunction(MF);
   }
 
   void Select(SDNode *Node) override;
 
   bool SelectInlineAsmMemoryOperand(const SDValue &Op, unsigned ConstraintID,
                                     std::vector<SDValue> &OutOps) override;
 

llvm/lib/Target/WebAssembly/WebAssemblyInstrAtomics.td

defm "" : NRI<oops, iops, pattern, asmstr,
             Requires<[HasAtomics]>;
 }
 
 //===----------------------------------------------------------------------===//
 // Atomic wait / notify
 //===----------------------------------------------------------------------===//
 
 let hasSideEffects = 1 in {
-defm ATOMIC_NOTIFY :
+defm ATOMIC_NOTIFY_A32 :
   ATOMIC_I<(outs I32:$dst),
            (ins P2Align:$p2align, offset32_op:$off, I32:$addr, I32:$count),
            (outs), (ins P2Align:$p2align, offset32_op:$off), [],
            "atomic.notify \t$dst, ${off}(${addr})${p2align}, $count",
            "atomic.notify \t${off}${p2align}", 0x00>;
+defm ATOMIC_NOTIFY_A64 :
+  ATOMIC_I<(outs I32:$dst),
+           (ins P2Align:$p2align, offset64_op:$off, I64:$addr, I32:$count),
+           (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+           "atomic.notify \t$dst, ${off}(${addr})${p2align}, $count",
+           "atomic.notify \t${off}${p2align}", 0x00>;
 let mayLoad = 1 in {
-defm ATOMIC_WAIT_I32 :
+defm ATOMIC_WAIT_I32_A32 :
   ATOMIC_I<(outs I32:$dst),
            (ins P2Align:$p2align, offset32_op:$off, I32:$addr, I32:$exp,
                 I64:$timeout),
            (outs), (ins P2Align:$p2align, offset32_op:$off), [],
            "i32.atomic.wait \t$dst, ${off}(${addr})${p2align}, $exp, $timeout",
            "i32.atomic.wait \t${off}${p2align}", 0x01>;
-defm ATOMIC_WAIT_I64 :
+defm ATOMIC_WAIT_I32_A64 :
+  ATOMIC_I<(outs I32:$dst),
+           (ins P2Align:$p2align, offset64_op:$off, I64:$addr, I32:$exp,
+                I64:$timeout),
+           (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+           "i32.atomic.wait \t$dst, ${off}(${addr})${p2align}, $exp, $timeout",
+           "i32.atomic.wait \t${off}${p2align}", 0x01>;
+defm ATOMIC_WAIT_I64_A32 :
   ATOMIC_I<(outs I32:$dst),
            (ins P2Align:$p2align, offset32_op:$off, I32:$addr, I64:$exp,
                 I64:$timeout),
            (outs), (ins P2Align:$p2align, offset32_op:$off), [],
            "i64.atomic.wait \t$dst, ${off}(${addr})${p2align}, $exp, $timeout",
            "i64.atomic.wait \t${off}${p2align}", 0x02>;
+defm ATOMIC_WAIT_I64_A64 :
+  ATOMIC_I<(outs I32:$dst),
+           (ins P2Align:$p2align, offset64_op:$off, I64:$addr, I64:$exp,
+                I64:$timeout),
+           (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+           "i64.atomic.wait \t$dst, ${off}(${addr})${p2align}, $exp, $timeout",
+           "i64.atomic.wait \t${off}${p2align}", 0x02>;
 } // mayLoad = 1
 } // hasSideEffects = 1
 
 let Predicates = [HasAtomics] in {
 // Select notifys with no constant offset.
-def NotifyPatNoOffset :
+def NotifyPatNoOffset_A32 :
   Pat<(i32 (int_wasm_atomic_notify I32:$addr, I32:$count)),
-      (ATOMIC_NOTIFY 0, 0, I32:$addr, I32:$count)>;
+      (ATOMIC_NOTIFY_A32 0, 0, I32:$addr, I32:$count)>;
+def NotifyPatNoOffset_A64 :
+  Pat<(i32 (int_wasm_atomic_notify I64:$addr, I32:$count)),
+      (ATOMIC_NOTIFY_A64 0, 0, I64:$addr, I32:$count)>;
 
 // Select notifys with a constant offset.
 
 // Pattern with address + immediate offset
-class NotifyPatImmOff<PatFrag operand> :
-  Pat<(i32 (int_wasm_atomic_notify (operand I32:$addr, imm:$off), I32:$count)),
-      (ATOMIC_NOTIFY 0, imm:$off, I32:$addr, I32:$count)>;
-def : NotifyPatImmOff<regPlusImm>;
-def : NotifyPatImmOff<or_is_add>;
+class NotifyPatImmOff<PatFrag operand, WebAssemblyRegClass rc, NI inst> :
+  Pat<(i32 (int_wasm_atomic_notify (operand rc:$addr, imm:$off), I32:$count)),
+      (inst 0, imm:$off, rc:$addr, I32:$count)>;
+def : NotifyPatImmOff<regPlusImm, I32, ATOMIC_NOTIFY_A32>;
+def : NotifyPatImmOff<or_is_add, I32, ATOMIC_NOTIFY_A32>;
+def : NotifyPatImmOff<regPlusImm, I64, ATOMIC_NOTIFY_A64>;
+def : NotifyPatImmOff<or_is_add, I64, ATOMIC_NOTIFY_A64>;
 
 // Select notifys with just a constant offset.
-def NotifyPatOffsetOnly :
+def NotifyPatOffsetOnly_A32 :
   Pat<(i32 (int_wasm_atomic_notify imm:$off, I32:$count)),
-      (ATOMIC_NOTIFY 0, imm:$off, (CONST_I32 0), I32:$count)>;
+      (ATOMIC_NOTIFY_A32 0, imm:$off, (CONST_I32 0), I32:$count)>;
+def NotifyPatOffsetOnly_A64 :
+  Pat<(i32 (int_wasm_atomic_notify imm:$off, I32:$count)),
+      (ATOMIC_NOTIFY_A64 0, imm:$off, (CONST_I64 0), I32:$count)>;
 
-def NotifyPatGlobalAddrOffOnly :
+def NotifyPatGlobalAddrOffOnly_A32 :
+  Pat<(i32 (int_wasm_atomic_notify (WebAssemblywrapper tglobaladdr:$off),
+                                   I32:$count)),
+      (ATOMIC_NOTIFY_A32 0, tglobaladdr:$off, (CONST_I32 0), I32:$count)>;
+def NotifyPatGlobalAddrOffOnly_A64 :
   Pat<(i32 (int_wasm_atomic_notify (WebAssemblywrapper tglobaladdr:$off),
                                    I32:$count)),
-      (ATOMIC_NOTIFY 0, tglobaladdr:$off, (CONST_I32 0), I32:$count)>;
+      (ATOMIC_NOTIFY_A64 0, tglobaladdr:$off, (CONST_I64 0), I32:$count)>;
 
 // Select waits with no constant offset.
-class WaitPatNoOffset<ValueType ty, Intrinsic kind, NI inst> :
-  Pat<(i32 (kind I32:$addr, ty:$exp, I64:$timeout)),
-      (inst 0, 0, I32:$addr, ty:$exp, I64:$timeout)>;
-def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, ATOMIC_WAIT_I32>;
-def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, ATOMIC_WAIT_I64>;
+class WaitPatNoOffset<ValueType ty, Intrinsic kind, WebAssemblyRegClass rc,
+                      NI inst> :
+  Pat<(i32 (kind rc:$addr, ty:$exp, I64:$timeout)),
+      (inst 0, 0, rc:$addr, ty:$exp, I64:$timeout)>;
+def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I32, ATOMIC_WAIT_I32_A32>;
+def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I32, ATOMIC_WAIT_I64_A32>;
+def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I32, ATOMIC_WAIT_I32_A32>;
+def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I32, ATOMIC_WAIT_I64_A32>;
+def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I64, ATOMIC_WAIT_I32_A64>;
+def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I64, ATOMIC_WAIT_I64_A64>;
+def : WaitPatNoOffset<i32, int_wasm_atomic_wait_i32, I64, ATOMIC_WAIT_I32_A64>;
+def : WaitPatNoOffset<i64, int_wasm_atomic_wait_i64, I64, ATOMIC_WAIT_I64_A64>;
 
 // Select waits with a constant offset.
 
 // Pattern with address + immediate offset
-class WaitPatImmOff<ValueType ty, Intrinsic kind, PatFrag operand, NI inst> :
-  Pat<(i32 (kind (operand I32:$addr, imm:$off), ty:$exp, I64:$timeout)),
-      (inst 0, imm:$off, I32:$addr, ty:$exp, I64:$timeout)>;
-def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, regPlusImm, ATOMIC_WAIT_I32>;
-def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, or_is_add, ATOMIC_WAIT_I32>;
-def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, regPlusImm, ATOMIC_WAIT_I64>;
-def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, or_is_add, ATOMIC_WAIT_I64>;
+class WaitPatImmOff<ValueType ty, Intrinsic kind, PatFrag operand,
+                    WebAssemblyRegClass rc, NI inst> :
+  Pat<(i32 (kind (operand rc:$addr, imm:$off), ty:$exp, I64:$timeout)),
+      (inst 0, imm:$off, rc:$addr, ty:$exp, I64:$timeout)>;
+def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, regPlusImm, I32, ATOMIC_WAIT_I32_A32>;
+def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, or_is_add, I32, ATOMIC_WAIT_I32_A32>;
+def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, regPlusImm, I32, ATOMIC_WAIT_I64_A32>;
+def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, or_is_add, I32, ATOMIC_WAIT_I64_A32>;
+def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, regPlusImm, I64, ATOMIC_WAIT_I32_A64>;
+def : WaitPatImmOff<i32, int_wasm_atomic_wait_i32, or_is_add, I64, ATOMIC_WAIT_I32_A64>;
+def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, regPlusImm, I64, ATOMIC_WAIT_I64_A64>;
+def : WaitPatImmOff<i64, int_wasm_atomic_wait_i64, or_is_add, I64, ATOMIC_WAIT_I64_A64>;
 
-// Select wait_i32, ATOMIC_WAIT_I32s with just a constant offset.
-class WaitPatOffsetOnly<ValueType ty, Intrinsic kind, NI inst> :
+// Select wait_i32, "ATOMIC_WAIT_I32s with just a constant offset.
+class WaitPatOffsetOnly<ValueType ty, Intrinsic kind, NI const_inst, NI inst> :
   Pat<(i32 (kind imm:$off, ty:$exp, I64:$timeout)),
-      (inst 0, imm:$off, (CONST_I32 0), ty:$exp, I64:$timeout)>;
-def : WaitPatOffsetOnly<i32, int_wasm_atomic_wait_i32, ATOMIC_WAIT_I32>;
-def : WaitPatOffsetOnly<i64, int_wasm_atomic_wait_i64, ATOMIC_WAIT_I64>;
+      (inst 0, imm:$off, (const_inst 0), ty:$exp, I64:$timeout)>;
+def : WaitPatOffsetOnly<i32, int_wasm_atomic_wait_i32, CONST_I32, ATOMIC_WAIT_I32_A32>;
+def : WaitPatOffsetOnly<i64, int_wasm_atomic_wait_i64, CONST_I32, ATOMIC_WAIT_I64_A32>;
+def : WaitPatOffsetOnly<i32, int_wasm_atomic_wait_i32, CONST_I64, ATOMIC_WAIT_I32_A64>;
+def : WaitPatOffsetOnly<i64, int_wasm_atomic_wait_i64, CONST_I64, ATOMIC_WAIT_I64_A64>;
 
-class WaitPatGlobalAddrOffOnly<ValueType ty, Intrinsic kind, NI inst> :
+class WaitPatGlobalAddrOffOnly<ValueType ty, Intrinsic kind, NI const_inst,
+                               NI inst> :
   Pat<(i32 (kind (WebAssemblywrapper tglobaladdr:$off), ty:$exp, I64:$timeout)),
-      (inst 0, tglobaladdr:$off, (CONST_I32 0), ty:$exp, I64:$timeout)>;
-def : WaitPatGlobalAddrOffOnly<i32, int_wasm_atomic_wait_i32, ATOMIC_WAIT_I32>;
-def : WaitPatGlobalAddrOffOnly<i64, int_wasm_atomic_wait_i64, ATOMIC_WAIT_I64>;
+      (inst 0, tglobaladdr:$off, (const_inst 0), ty:$exp, I64:$timeout)>;
+def : WaitPatGlobalAddrOffOnly<i32, int_wasm_atomic_wait_i32, CONST_I32, ATOMIC_WAIT_I32_A32>;
+def : WaitPatGlobalAddrOffOnly<i64, int_wasm_atomic_wait_i64, CONST_I32, ATOMIC_WAIT_I64_A32>;
+def : WaitPatGlobalAddrOffOnly<i32, int_wasm_atomic_wait_i32, CONST_I64, ATOMIC_WAIT_I32_A64>;
+def : WaitPatGlobalAddrOffOnly<i64, int_wasm_atomic_wait_i64, CONST_I64, ATOMIC_WAIT_I64_A64>;
 } // Predicates = [HasAtomics]
 
 //===----------------------------------------------------------------------===//
 // Atomic fences
 //===----------------------------------------------------------------------===//
 
 // A compiler fence instruction that prevents reordering of instructions.
 let Defs = [ARGUMENTS] in {
 let isPseudo = 1, hasSideEffects = 1 in
 defm COMPILER_FENCE : ATOMIC_NRI<(outs), (ins), [], "compiler_fence">;
 let hasSideEffects = 1 in
 defm ATOMIC_FENCE : ATOMIC_NRI<(outs), (ins i8imm:$flags), [], "atomic.fence",
                                0x03>;
 } // Defs = [ARGUMENTS]
 
 //===----------------------------------------------------------------------===//
 // Atomic loads
 //===----------------------------------------------------------------------===//
 
 multiclass AtomicLoad<WebAssemblyRegClass rc, string name, int atomic_op> {
-  defm "" : WebAssemblyLoad<rc, name, !or(0xfe00, !and(0xff, atomic_op))>,
-            Requires<[HasAtomics]>;
+  defm "" : WebAssemblyLoad<rc, name, !or(0xfe00, !and(0xff, atomic_op)),
+                            [HasAtomics]>;
 }
 
 defm ATOMIC_LOAD_I32 : AtomicLoad<I32, "i32.atomic.load", 0x10>;
 defm ATOMIC_LOAD_I64 : AtomicLoad<I64, "i64.atomic.load", 0x11>;
 
 // Select loads with no constant offset.
 let Predicates = [HasAtomics] in {
-def : LoadPatNoOffset<i32, atomic_load_32, ATOMIC_LOAD_I32>;
-def : LoadPatNoOffset<i64, atomic_load_64, ATOMIC_LOAD_I64>;
+defm : LoadPatNoOffset<i32, atomic_load_32, "ATOMIC_LOAD_I32">;
+defm : LoadPatNoOffset<i64, atomic_load_64, "ATOMIC_LOAD_I64">;
 
 // Select loads with a constant offset.
 
 // Pattern with address + immediate offset
-def : LoadPatImmOff<i32, atomic_load_32, regPlusImm, ATOMIC_LOAD_I32>;
-def : LoadPatImmOff<i64, atomic_load_64, regPlusImm, ATOMIC_LOAD_I64>;
-def : LoadPatImmOff<i32, atomic_load_32, or_is_add, ATOMIC_LOAD_I32>;
-def : LoadPatImmOff<i64, atomic_load_64, or_is_add, ATOMIC_LOAD_I64>;
+defm : LoadPatImmOff<i32, atomic_load_32, regPlusImm, "ATOMIC_LOAD_I32">;
+defm : LoadPatImmOff<i64, atomic_load_64, regPlusImm, "ATOMIC_LOAD_I64">;
+defm : LoadPatImmOff<i32, atomic_load_32, or_is_add, "ATOMIC_LOAD_I32">;
+defm : LoadPatImmOff<i64, atomic_load_64, or_is_add, "ATOMIC_LOAD_I64">;
 
 // Select loads with just a constant offset.
-def : LoadPatOffsetOnly<i32, atomic_load_32, ATOMIC_LOAD_I32>;
-def : LoadPatOffsetOnly<i64, atomic_load_64, ATOMIC_LOAD_I64>;
+defm : LoadPatOffsetOnly<i32, atomic_load_32, "ATOMIC_LOAD_I32">;
+defm : LoadPatOffsetOnly<i64, atomic_load_64, "ATOMIC_LOAD_I64">;
 
-def : LoadPatGlobalAddrOffOnly<i32, atomic_load_32, ATOMIC_LOAD_I32>;
-def : LoadPatGlobalAddrOffOnly<i64, atomic_load_64, ATOMIC_LOAD_I64>;
+defm : LoadPatGlobalAddrOffOnly<i32, atomic_load_32, "ATOMIC_LOAD_I32">;
+defm : LoadPatGlobalAddrOffOnly<i64, atomic_load_64, "ATOMIC_LOAD_I64">;
 
 } // Predicates = [HasAtomics]
 
 // Extending loads. Note that there are only zero-extending atomic loads, no
 // sign-extending loads.
 defm ATOMIC_LOAD8_U_I32 : AtomicLoad<I32, "i32.atomic.load8_u", 0x12>;
 defm ATOMIC_LOAD16_U_I32 : AtomicLoad<I32, "i32.atomic.load16_u", 0x13>;
 defm ATOMIC_LOAD8_U_I64 : AtomicLoad<I64, "i64.atomic.load8_u", 0x14>;

 // which is selected by itself.
 def sext_aload_8_64 :
   PatFrag<(ops node:$addr), (anyext (i32 (atomic_load_8 node:$addr)))>;
 def sext_aload_16_64 :
   PatFrag<(ops node:$addr), (anyext (i32 (atomic_load_16 node:$addr)))>;
 
 let Predicates = [HasAtomics] in {
 // Select zero-extending loads with no constant offset.
-def : LoadPatNoOffset<i32, zext_aload_8_32, ATOMIC_LOAD8_U_I32>;
-def : LoadPatNoOffset<i32, zext_aload_16_32, ATOMIC_LOAD16_U_I32>;
-def : LoadPatNoOffset<i64, zext_aload_8_64, ATOMIC_LOAD8_U_I64>;
-def : LoadPatNoOffset<i64, zext_aload_16_64, ATOMIC_LOAD16_U_I64>;
-def : LoadPatNoOffset<i64, zext_aload_32_64, ATOMIC_LOAD32_U_I64>;
+defm : LoadPatNoOffset<i32, zext_aload_8_32, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatNoOffset<i32, zext_aload_16_32, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatNoOffset<i64, zext_aload_8_64, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatNoOffset<i64, zext_aload_16_64, "ATOMIC_LOAD16_U_I64">;
+defm : LoadPatNoOffset<i64, zext_aload_32_64, "ATOMIC_LOAD32_U_I64">;
 
 // Select sign-extending loads with no constant offset
-def : LoadPatNoOffset<i32, atomic_load_8, ATOMIC_LOAD8_U_I32>;
-def : LoadPatNoOffset<i32, atomic_load_16, ATOMIC_LOAD16_U_I32>;
-def : LoadPatNoOffset<i64, sext_aload_8_64, ATOMIC_LOAD8_U_I64>;
-def : LoadPatNoOffset<i64, sext_aload_16_64, ATOMIC_LOAD16_U_I64>;
+defm : LoadPatNoOffset<i32, atomic_load_8, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatNoOffset<i32, atomic_load_16, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatNoOffset<i64, sext_aload_8_64, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatNoOffset<i64, sext_aload_16_64, "ATOMIC_LOAD16_U_I64">;
 // 32->64 sext load gets selected as i32.atomic.load, i64.extend_i32_s
 
 // Zero-extending loads with constant offset
-def : LoadPatImmOff<i32, zext_aload_8_32, regPlusImm, ATOMIC_LOAD8_U_I32>;
-def : LoadPatImmOff<i32, zext_aload_16_32, regPlusImm, ATOMIC_LOAD16_U_I32>;
-def : LoadPatImmOff<i32, zext_aload_8_32, or_is_add, ATOMIC_LOAD8_U_I32>;
-def : LoadPatImmOff<i32, zext_aload_16_32, or_is_add, ATOMIC_LOAD16_U_I32>;
-def : LoadPatImmOff<i64, zext_aload_8_64, regPlusImm, ATOMIC_LOAD8_U_I64>;
-def : LoadPatImmOff<i64, zext_aload_16_64, regPlusImm, ATOMIC_LOAD16_U_I64>;
-def : LoadPatImmOff<i64, zext_aload_32_64, regPlusImm, ATOMIC_LOAD32_U_I64>;
-def : LoadPatImmOff<i64, zext_aload_8_64, or_is_add, ATOMIC_LOAD8_U_I64>;
-def : LoadPatImmOff<i64, zext_aload_16_64, or_is_add, ATOMIC_LOAD16_U_I64>;
-def : LoadPatImmOff<i64, zext_aload_32_64, or_is_add, ATOMIC_LOAD32_U_I64>;
+defm : LoadPatImmOff<i32, zext_aload_8_32, regPlusImm, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, zext_aload_16_32, regPlusImm, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatImmOff<i32, zext_aload_8_32, or_is_add, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, zext_aload_16_32, or_is_add, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatImmOff<i64, zext_aload_8_64, regPlusImm, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, zext_aload_16_64, regPlusImm, "ATOMIC_LOAD16_U_I64">;
+defm : LoadPatImmOff<i64, zext_aload_32_64, regPlusImm, "ATOMIC_LOAD32_U_I64">;
+defm : LoadPatImmOff<i64, zext_aload_8_64, or_is_add, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, zext_aload_16_64, or_is_add, "ATOMIC_LOAD16_U_I64">;
+defm : LoadPatImmOff<i64, zext_aload_32_64, or_is_add, "ATOMIC_LOAD32_U_I64">;
 
 // Sign-extending loads with constant offset
-def : LoadPatImmOff<i32, atomic_load_8, regPlusImm, ATOMIC_LOAD8_U_I32>;
-def : LoadPatImmOff<i32, atomic_load_16, regPlusImm, ATOMIC_LOAD16_U_I32>;
-def : LoadPatImmOff<i32, atomic_load_8, or_is_add, ATOMIC_LOAD8_U_I32>;
-def : LoadPatImmOff<i32, atomic_load_16, or_is_add, ATOMIC_LOAD16_U_I32>;
-def : LoadPatImmOff<i64, sext_aload_8_64, regPlusImm, ATOMIC_LOAD8_U_I64>;
-def : LoadPatImmOff<i64, sext_aload_16_64, regPlusImm, ATOMIC_LOAD16_U_I64>;
-def : LoadPatImmOff<i64, sext_aload_8_64, or_is_add, ATOMIC_LOAD8_U_I64>;
-def : LoadPatImmOff<i64, sext_aload_16_64, or_is_add, ATOMIC_LOAD16_U_I64>;
+defm : LoadPatImmOff<i32, atomic_load_8, regPlusImm, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, atomic_load_16, regPlusImm, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatImmOff<i32, atomic_load_8, or_is_add, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, atomic_load_16, or_is_add, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatImmOff<i64, sext_aload_8_64, regPlusImm, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, sext_aload_16_64, regPlusImm, "ATOMIC_LOAD16_U_I64">;
+defm : LoadPatImmOff<i64, sext_aload_8_64, or_is_add, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, sext_aload_16_64, or_is_add, "ATOMIC_LOAD16_U_I64">;
 // No 32->64 patterns, just use i32.atomic.load and i64.extend_s/i64
 
 // Extending loads with just a constant offset
-def : LoadPatOffsetOnly<i32, zext_aload_8_32, ATOMIC_LOAD8_U_I32>;
-def : LoadPatOffsetOnly<i32, zext_aload_16_32, ATOMIC_LOAD16_U_I32>;
-def : LoadPatOffsetOnly<i64, zext_aload_8_64, ATOMIC_LOAD8_U_I64>;
-def : LoadPatOffsetOnly<i64, zext_aload_16_64, ATOMIC_LOAD16_U_I64>;
-def : LoadPatOffsetOnly<i64, zext_aload_32_64, ATOMIC_LOAD32_U_I64>;
-def : LoadPatOffsetOnly<i32, atomic_load_8, ATOMIC_LOAD8_U_I32>;
-def : LoadPatOffsetOnly<i32, atomic_load_16, ATOMIC_LOAD16_U_I32>;
-def : LoadPatOffsetOnly<i64, sext_aload_8_64, ATOMIC_LOAD8_U_I64>;
-def : LoadPatOffsetOnly<i64, sext_aload_16_64, ATOMIC_LOAD16_U_I64>;
-
-def : LoadPatGlobalAddrOffOnly<i32, zext_aload_8_32, ATOMIC_LOAD8_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i32, zext_aload_16_32, ATOMIC_LOAD16_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i64, zext_aload_8_64, ATOMIC_LOAD8_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, zext_aload_16_64, ATOMIC_LOAD16_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, zext_aload_32_64, ATOMIC_LOAD32_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i32, atomic_load_8, ATOMIC_LOAD8_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i32, atomic_load_16, ATOMIC_LOAD16_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i64, sext_aload_8_64, ATOMIC_LOAD8_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, sext_aload_16_64, ATOMIC_LOAD16_U_I64>;
+defm : LoadPatOffsetOnly<i32, zext_aload_8_32, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatOffsetOnly<i32, zext_aload_16_32, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatOffsetOnly<i64, zext_aload_8_64, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatOffsetOnly<i64, zext_aload_16_64, "ATOMIC_LOAD16_U_I64">;
+defm : LoadPatOffsetOnly<i64, zext_aload_32_64, "ATOMIC_LOAD32_U_I64">;
+defm : LoadPatOffsetOnly<i32, atomic_load_8, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatOffsetOnly<i32, atomic_load_16, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatOffsetOnly<i64, sext_aload_8_64, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatOffsetOnly<i64, sext_aload_16_64, "ATOMIC_LOAD16_U_I64">;
+
+defm : LoadPatGlobalAddrOffOnly<i32, zext_aload_8_32, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i32, zext_aload_16_32, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i64, zext_aload_8_64, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, zext_aload_16_64, "ATOMIC_LOAD16_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, zext_aload_32_64, "ATOMIC_LOAD32_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i32, atomic_load_8, "ATOMIC_LOAD8_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i32, atomic_load_16, "ATOMIC_LOAD16_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i64, sext_aload_8_64, "ATOMIC_LOAD8_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, sext_aload_16_64, "ATOMIC_LOAD16_U_I64">;
 
 } // Predicates = [HasAtomics]
 
 //===----------------------------------------------------------------------===//
 // Atomic stores
 //===----------------------------------------------------------------------===//
 
 multiclass AtomicStore<WebAssemblyRegClass rc, string name, int atomic_op> {
   defm "" : WebAssemblyStore<rc, name, !or(0xfe00, !and(0xff, atomic_op))>,
             Requires<[HasAtomics]>;
 }
 
 defm ATOMIC_STORE_I32 : AtomicStore<I32, "i32.atomic.store", 0x17>;
 defm ATOMIC_STORE_I64 : AtomicStore<I64, "i64.atomic.store", 0x18>;
 
 // We need an 'atomic' version of store patterns because store and atomic_store
 // nodes have different operand orders:
 // store: (store $val, $ptr)
 // atomic_store: (store $ptr, $val)
 
 let Predicates = [HasAtomics] in {
 
 // Select stores with no constant offset.
-class AStorePatNoOffset<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(kind I32:$addr, ty:$val), (inst 0, 0, I32:$addr, ty:$val)>;
-def : AStorePatNoOffset<i32, atomic_store_32, ATOMIC_STORE_I32>;
-def : AStorePatNoOffset<i64, atomic_store_64, ATOMIC_STORE_I64>;
+class AStorePatNoOffset<ValueType ty, PatFrag kind, WebAssemblyRegClass rc, NI inst> :
+  Pat<(kind rc:$addr, ty:$val), (inst 0, 0, rc:$addr, ty:$val)>;
+def : AStorePatNoOffset<i32, atomic_store_32, I32, ATOMIC_STORE_I32_A32>;
+def : AStorePatNoOffset<i64, atomic_store_64, I32, ATOMIC_STORE_I64_A32>;
+def : AStorePatNoOffset<i32, atomic_store_32, I64, ATOMIC_STORE_I32_A64>;
+def : AStorePatNoOffset<i64, atomic_store_64, I64, ATOMIC_STORE_I64_A64>;
 
 // Select stores with a constant offset.
 
 // Pattern with address + immediate offset
-class AStorePatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :
-  Pat<(kind (operand I32:$addr, imm:$off), ty:$val),
-      (inst 0, imm:$off, I32:$addr, ty:$val)>;
-def : AStorePatImmOff<i32, atomic_store_32, regPlusImm, ATOMIC_STORE_I32>;
-def : AStorePatImmOff<i64, atomic_store_64, regPlusImm, ATOMIC_STORE_I64>;
-def : AStorePatImmOff<i32, atomic_store_32, or_is_add, ATOMIC_STORE_I32>;
-def : AStorePatImmOff<i64, atomic_store_64, or_is_add, ATOMIC_STORE_I64>;
+class AStorePatImmOff<ValueType ty, PatFrag kind, PatFrag operand, WebAssemblyRegClass rc, NI inst> :
+  Pat<(kind (operand rc:$addr, imm:$off), ty:$val),
+      (inst 0, imm:$off, rc:$addr, ty:$val)>;
+def : AStorePatImmOff<i32, atomic_store_32, regPlusImm, I32, ATOMIC_STORE_I32_A32>;
+def : AStorePatImmOff<i64, atomic_store_64, regPlusImm, I32, ATOMIC_STORE_I64_A32>;
+def : AStorePatImmOff<i32, atomic_store_32, or_is_add, I64, ATOMIC_STORE_I32_A64>;
+def : AStorePatImmOff<i64, atomic_store_64, or_is_add, I64, ATOMIC_STORE_I64_A64>;
 
 // Select stores with just a constant offset.
-class AStorePatOffsetOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(kind imm:$off, ty:$val), (inst 0, imm:$off, (CONST_I32 0), ty:$val)>;
-def : AStorePatOffsetOnly<i32, atomic_store_32, ATOMIC_STORE_I32>;
-def : AStorePatOffsetOnly<i64, atomic_store_64, ATOMIC_STORE_I64>;
+class AStorePatOffsetOnly<ValueType ty, PatFrag kind, NI const_inst, NI inst> :
+  Pat<(kind imm:$off, ty:$val), (inst 0, imm:$off, (const_inst 0), ty:$val)>;
+def : AStorePatOffsetOnly<i32, atomic_store_32, CONST_I32, ATOMIC_STORE_I32_A32>;
+def : AStorePatOffsetOnly<i64, atomic_store_64, CONST_I32, ATOMIC_STORE_I64_A32>;
+def : AStorePatOffsetOnly<i32, atomic_store_32, CONST_I64, ATOMIC_STORE_I32_A64>;
+def : AStorePatOffsetOnly<i64, atomic_store_64, CONST_I64, ATOMIC_STORE_I64_A64>;
 
-class AStorePatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> :
+class AStorePatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI const_inst, NI inst> :
   Pat<(kind (WebAssemblywrapper tglobaladdr:$off), ty:$val),
-      (inst 0, tglobaladdr:$off, (CONST_I32 0), ty:$val)>;
-def : AStorePatGlobalAddrOffOnly<i32, atomic_store_32, ATOMIC_STORE_I32>;
-def : AStorePatGlobalAddrOffOnly<i64, atomic_store_64, ATOMIC_STORE_I64>;
+      (inst 0, tglobaladdr:$off, (const_inst 0), ty:$val)>;
+def : AStorePatGlobalAddrOffOnly<i32, atomic_store_32, CONST_I32, ATOMIC_STORE_I32_A32>;
+def : AStorePatGlobalAddrOffOnly<i64, atomic_store_64, CONST_I32, ATOMIC_STORE_I64_A32>;
+def : AStorePatGlobalAddrOffOnly<i32, atomic_store_32, CONST_I64, ATOMIC_STORE_I32_A64>;
+def : AStorePatGlobalAddrOffOnly<i64, atomic_store_64, CONST_I64, ATOMIC_STORE_I64_A64>;
 
 } // Predicates = [HasAtomics]
 
 // Truncating stores.
 defm ATOMIC_STORE8_I32 : AtomicStore<I32, "i32.atomic.store8", 0x19>;
 defm ATOMIC_STORE16_I32 : AtomicStore<I32, "i32.atomic.store16", 0x1a>;
 defm ATOMIC_STORE8_I64 : AtomicStore<I64, "i64.atomic.store8", 0x1b>;
 defm ATOMIC_STORE16_I64 : AtomicStore<I64, "i64.atomic.store16", 0x1c>;
PatFrag<(ops node:$addr, node:$val),
           (kind node:$addr, (i32 (trunc (i64 node:$val))))>;
 def trunc_astore_8_64 : trunc_astore_64<atomic_store_8>;
 def trunc_astore_16_64 : trunc_astore_64<atomic_store_16>;
 def trunc_astore_32_64 : trunc_astore_64<atomic_store_32>;
 
 let Predicates = [HasAtomics] in {
 
 // Truncating stores with no constant offset
-def : AStorePatNoOffset<i32, atomic_store_8, ATOMIC_STORE8_I32>;
-def : AStorePatNoOffset<i32, atomic_store_16, ATOMIC_STORE16_I32>;
-def : AStorePatNoOffset<i64, trunc_astore_8_64, ATOMIC_STORE8_I64>;
-def : AStorePatNoOffset<i64, trunc_astore_16_64, ATOMIC_STORE16_I64>;
-def : AStorePatNoOffset<i64, trunc_astore_32_64, ATOMIC_STORE32_I64>;
+def : AStorePatNoOffset<i32, atomic_store_8, I32, ATOMIC_STORE8_I32_A32>;
+def : AStorePatNoOffset<i32, atomic_store_16, I32, ATOMIC_STORE16_I32_A32>;
+def : AStorePatNoOffset<i64, trunc_astore_8_64, I32, ATOMIC_STORE8_I64_A32>;
+def : AStorePatNoOffset<i64, trunc_astore_16_64, I32, ATOMIC_STORE16_I64_A32>;
+def : AStorePatNoOffset<i64, trunc_astore_32_64, I32, ATOMIC_STORE32_I64_A32>;
+def : AStorePatNoOffset<i32, atomic_store_8, I64, ATOMIC_STORE8_I32_A64>;
+def : AStorePatNoOffset<i32, atomic_store_16, I64, ATOMIC_STORE16_I32_A64>;
+def : AStorePatNoOffset<i64, trunc_astore_8_64, I64, ATOMIC_STORE8_I64_A64>;
+def : AStorePatNoOffset<i64, trunc_astore_16_64, I64, ATOMIC_STORE16_I64_A64>;
+def : AStorePatNoOffset<i64, trunc_astore_32_64, I64, ATOMIC_STORE32_I64_A64>;
 
 // Truncating stores with a constant offset
-def : AStorePatImmOff<i32, atomic_store_8, regPlusImm, ATOMIC_STORE8_I32>;
-def : AStorePatImmOff<i32, atomic_store_16, regPlusImm, ATOMIC_STORE16_I32>;
-def : AStorePatImmOff<i64, trunc_astore_8_64, regPlusImm, ATOMIC_STORE8_I64>;
-def : AStorePatImmOff<i64, trunc_astore_16_64, regPlusImm, ATOMIC_STORE16_I64>;
-def : AStorePatImmOff<i64, trunc_astore_32_64, regPlusImm, ATOMIC_STORE32_I64>;
-def : AStorePatImmOff<i32, atomic_store_8, or_is_add, ATOMIC_STORE8_I32>;
-def : AStorePatImmOff<i32, atomic_store_16, or_is_add, ATOMIC_STORE16_I32>;
-def : AStorePatImmOff<i64, trunc_astore_8_64, or_is_add, ATOMIC_STORE8_I64>;
-def : AStorePatImmOff<i64, trunc_astore_16_64, or_is_add, ATOMIC_STORE16_I64>;
-def : AStorePatImmOff<i64, trunc_astore_32_64, or_is_add, ATOMIC_STORE32_I64>;
+def : AStorePatImmOff<i32, atomic_store_8, regPlusImm, I32, ATOMIC_STORE8_I32_A32>;
+def : AStorePatImmOff<i32, atomic_store_16, regPlusImm, I32, ATOMIC_STORE16_I32_A32>;
+def : AStorePatImmOff<i64, trunc_astore_8_64, regPlusImm, I32, ATOMIC_STORE8_I64_A32>;
+def : AStorePatImmOff<i64, trunc_astore_16_64, regPlusImm, I32, ATOMIC_STORE16_I64_A32>;
+def : AStorePatImmOff<i64, trunc_astore_32_64, regPlusImm, I32, ATOMIC_STORE32_I64_A32>;
+def : AStorePatImmOff<i32, atomic_store_8, or_is_add, I32, ATOMIC_STORE8_I32_A32>;
+def : AStorePatImmOff<i32, atomic_store_16, or_is_add, I32, ATOMIC_STORE16_I32_A32>;
+def : AStorePatImmOff<i64, trunc_astore_8_64, or_is_add, I32, ATOMIC_STORE8_I64_A32>;
+def : AStorePatImmOff<i64, trunc_astore_16_64, or_is_add, I32, ATOMIC_STORE16_I64_A32>;
+def : AStorePatImmOff<i64, trunc_astore_32_64, or_is_add, I32, ATOMIC_STORE32_I64_A32>;
+def : AStorePatImmOff<i32, atomic_store_8, regPlusImm, I64, ATOMIC_STORE8_I32_A64>;
+def : AStorePatImmOff<i32, atomic_store_16, regPlusImm, I64, ATOMIC_STORE16_I32_A64>;
+def : AStorePatImmOff<i64, trunc_astore_8_64, regPlusImm, I64, ATOMIC_STORE8_I64_A64>;
+def : AStorePatImmOff<i64, trunc_astore_16_64, regPlusImm, I64, ATOMIC_STORE16_I64_A64>;
+def : AStorePatImmOff<i64, trunc_astore_32_64, regPlusImm, I64, ATOMIC_STORE32_I64_A64>;
+def : AStorePatImmOff<i32, atomic_store_8, or_is_add, I64, ATOMIC_STORE8_I32_A64>;
+def : AStorePatImmOff<i32, atomic_store_16, or_is_add, I64, ATOMIC_STORE16_I32_A64>;
+def : AStorePatImmOff<i64, trunc_astore_8_64, or_is_add, I64, ATOMIC_STORE8_I64_A64>;
+def : AStorePatImmOff<i64, trunc_astore_16_64, or_is_add, I64, ATOMIC_STORE16_I64_A64>;
+def : AStorePatImmOff<i64, trunc_astore_32_64, or_is_add, I64, ATOMIC_STORE32_I64_A64>;
 
 // Truncating stores with just a constant offset
-def : AStorePatOffsetOnly<i32, atomic_store_8, ATOMIC_STORE8_I32>;
-def : AStorePatOffsetOnly<i32, atomic_store_16, ATOMIC_STORE16_I32>;
-def : AStorePatOffsetOnly<i64, trunc_astore_8_64, ATOMIC_STORE8_I64>;
-def : AStorePatOffsetOnly<i64, trunc_astore_16_64, ATOMIC_STORE16_I64>;
-def : AStorePatOffsetOnly<i64, trunc_astore_32_64, ATOMIC_STORE32_I64>;
-
-def : AStorePatGlobalAddrOffOnly<i32, atomic_store_8, ATOMIC_STORE8_I32>;
-def : AStorePatGlobalAddrOffOnly<i32, atomic_store_16, ATOMIC_STORE16_I32>;
-def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_8_64, ATOMIC_STORE8_I64>;
-def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_16_64, ATOMIC_STORE16_I64>;
-def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_32_64, ATOMIC_STORE32_I64>;
+def : AStorePatOffsetOnly<i32, atomic_store_8, CONST_I32, ATOMIC_STORE8_I32_A32>;
+def : AStorePatOffsetOnly<i32, atomic_store_16, CONST_I32, ATOMIC_STORE16_I32_A32>;
+def : AStorePatOffsetOnly<i64, trunc_astore_8_64, CONST_I32, ATOMIC_STORE8_I64_A32>;
+def : AStorePatOffsetOnly<i64, trunc_astore_16_64, CONST_I32, ATOMIC_STORE16_I64_A32>;
+def : AStorePatOffsetOnly<i64, trunc_astore_32_64, CONST_I32, ATOMIC_STORE32_I64_A32>;
+def : AStorePatOffsetOnly<i32, atomic_store_8, CONST_I64, ATOMIC_STORE8_I32_A64>;
+def : AStorePatOffsetOnly<i32, atomic_store_16, CONST_I64, ATOMIC_STORE16_I32_A64>;
+def : AStorePatOffsetOnly<i64, trunc_astore_8_64, CONST_I64, ATOMIC_STORE8_I64_A64>;
+def : AStorePatOffsetOnly<i64, trunc_astore_16_64, CONST_I64, ATOMIC_STORE16_I64_A64>;
+def : AStorePatOffsetOnly<i64, trunc_astore_32_64, CONST_I64, ATOMIC_STORE32_I64_A64>;
+
+def : AStorePatGlobalAddrOffOnly<i32, atomic_store_8, CONST_I32, ATOMIC_STORE8_I32_A32>;
+def : AStorePatGlobalAddrOffOnly<i32, atomic_store_16, CONST_I32, ATOMIC_STORE16_I32_A32>;
+def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_8_64, CONST_I32, ATOMIC_STORE8_I64_A32>;
+def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_16_64, CONST_I32, ATOMIC_STORE16_I64_A32>;
+def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_32_64, CONST_I32, ATOMIC_STORE32_I64_A32>;
+def : AStorePatGlobalAddrOffOnly<i32, atomic_store_8, CONST_I64, ATOMIC_STORE8_I32_A64>;
+def : AStorePatGlobalAddrOffOnly<i32, atomic_store_16, CONST_I64, ATOMIC_STORE16_I32_A64>;
+def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_8_64, CONST_I64, ATOMIC_STORE8_I64_A64>;
+def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_16_64, CONST_I64, ATOMIC_STORE16_I64_A64>;
+def : AStorePatGlobalAddrOffOnly<i64, trunc_astore_32_64, CONST_I64, ATOMIC_STORE32_I64_A64>;
 
 } // Predicates = [HasAtomics]
 
 //===----------------------------------------------------------------------===//
 // Atomic binary read-modify-writes
 //===----------------------------------------------------------------------===//
 
 multiclass WebAssemblyBinRMW<WebAssemblyRegClass rc, string name,
                              int atomic_op> {
-  defm "" :
+  defm "_A32" :
     ATOMIC_I<(outs rc:$dst),
              (ins P2Align:$p2align, offset32_op:$off, I32:$addr, rc:$val),
              (outs), (ins P2Align:$p2align, offset32_op:$off), [],
              !strconcat(name, "\t$dst, ${off}(${addr})${p2align}, $val"),
              !strconcat(name, "\t${off}${p2align}"), atomic_op>;
+  defm "_A64" :
+    ATOMIC_I<(outs rc:$dst),
+             (ins P2Align:$p2align, offset64_op:$off, I64:$addr, rc:$val),
+             (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+             !strconcat(name, "\t$dst, ${off}(${addr})${p2align}, $val"),
+             !strconcat(name, "\t${off}${p2align}"), atomic_op>;
 }
 
 defm ATOMIC_RMW_ADD_I32 : WebAssemblyBinRMW<I32, "i32.atomic.rmw.add", 0x1e>;
 defm ATOMIC_RMW_ADD_I64 : WebAssemblyBinRMW<I64, "i64.atomic.rmw.add", 0x1f>;
 defm ATOMIC_RMW8_U_ADD_I32 :
   WebAssemblyBinRMW<I32, "i32.atomic.rmw8.add_u", 0x20>;
 defm ATOMIC_RMW16_U_ADD_I32 :
   WebAssemblyBinRMW<I32, "i32.atomic.rmw16.add_u", 0x21>;

 defm ATOMIC_RMW8_U_XCHG_I64 :
   WebAssemblyBinRMW<I64, "i64.atomic.rmw8.xchg_u", 0x45>;
 defm ATOMIC_RMW16_U_XCHG_I64 :
   WebAssemblyBinRMW<I64, "i64.atomic.rmw16.xchg_u", 0x46>;
 defm ATOMIC_RMW32_U_XCHG_I64 :
   WebAssemblyBinRMW<I64, "i64.atomic.rmw32.xchg_u", 0x47>;
 
 // Select binary RMWs with no constant offset.
-class BinRMWPatNoOffset<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind I32:$addr, ty:$val)), (inst 0, 0, I32:$addr, ty:$val)>;
+multiclass BinRMWPatNoOffset<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind I32:$addr, ty:$val)), (!cast<NI>(inst#_A32) 0, 0, I32:$addr, ty:$val)>;
+  def : Pat<(ty (kind I64:$addr, ty:$val)), (!cast<NI>(inst#_A64) 0, 0, I64:$addr, ty:$val)>;
+}
 
 // Select binary RMWs with a constant offset.
 
 // Pattern with address + immediate offset
-class BinRMWPatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :
-  Pat<(ty (kind (operand I32:$addr, imm:$off), ty:$val)),
-      (inst 0, imm:$off, I32:$addr, ty:$val)>;
+multiclass BinRMWPatImmOff<ValueType ty, PatFrag kind, PatFrag operand, string inst> {
+  def : Pat<(ty (kind (operand I32:$addr, imm:$off), ty:$val)),
+            (!cast<NI>(inst#_A32) 0, imm:$off, I32:$addr, ty:$val)>;
+  def : Pat<(ty (kind (operand I64:$addr, imm:$off), ty:$val)),
+            (!cast<NI>(inst#_A64) 0, imm:$off, I64:$addr, ty:$val)>;
+}
 
 // Select binary RMWs with just a constant offset.
-class BinRMWPatOffsetOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind imm:$off, ty:$val)),
-      (inst 0, imm:$off, (CONST_I32 0), ty:$val)>;
-
-class BinRMWPatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off), ty:$val)),
-      (inst 0, tglobaladdr:$off, (CONST_I32 0), ty:$val)>;
+multiclass BinRMWPatOffsetOnly<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind imm:$off, ty:$val)),
+            (!cast<NI>(inst#_A32) 0, imm:$off, (CONST_I32 0), ty:$val)>;
+  def : Pat<(ty (kind imm:$off, ty:$val)),
+            (!cast<NI>(inst#_A64) 0, imm:$off, (CONST_I64 0), ty:$val)>;
+}
+
+multiclass BinRMWPatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> {
+  def : Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off), ty:$val)),
+            (!cast<NI>(inst#_A32) 0, tglobaladdr:$off, (CONST_I32 0), ty:$val)>;
+  def : Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off), ty:$val)),
+            (!cast<NI>(inst#_A64) 0, tglobaladdr:$off, (CONST_I64 0), ty:$val)>;
+}
 
 // Patterns for various addressing modes.
-multiclass BinRMWPattern<PatFrag rmw_32, PatFrag rmw_64, NI inst_32,
-                         NI inst_64> {
-  def : BinRMWPatNoOffset<i32, rmw_32, inst_32>;
-  def : BinRMWPatNoOffset<i64, rmw_64, inst_64>;
-
-  def : BinRMWPatImmOff<i32, rmw_32, regPlusImm, inst_32>;
-  def : BinRMWPatImmOff<i64, rmw_64, regPlusImm, inst_64>;
-  def : BinRMWPatImmOff<i32, rmw_32, or_is_add, inst_32>;
-  def : BinRMWPatImmOff<i64, rmw_64, or_is_add, inst_64>;
+multiclass BinRMWPattern<PatFrag rmw_32, PatFrag rmw_64, string inst_32,
+                         string inst_64> {
+  defm : BinRMWPatNoOffset<i32, rmw_32, inst_32>;
+  defm : BinRMWPatNoOffset<i64, rmw_64, inst_64>;
+
+  defm : BinRMWPatImmOff<i32, rmw_32, regPlusImm, inst_32>;
+  defm : BinRMWPatImmOff<i64, rmw_64, regPlusImm, inst_64>;
+  defm : BinRMWPatImmOff<i32, rmw_32, or_is_add, inst_32>;
+  defm : BinRMWPatImmOff<i64, rmw_64, or_is_add, inst_64>;
 
-  def : BinRMWPatOffsetOnly<i32, rmw_32, inst_32>;
-  def : BinRMWPatOffsetOnly<i64, rmw_64, inst_64>;
+  defm : BinRMWPatOffsetOnly<i32, rmw_32, inst_32>;
+  defm : BinRMWPatOffsetOnly<i64, rmw_64, inst_64>;
 
-  def : BinRMWPatGlobalAddrOffOnly<i32, rmw_32, inst_32>;
-  def : BinRMWPatGlobalAddrOffOnly<i64, rmw_64, inst_64>;
+  defm : BinRMWPatGlobalAddrOffOnly<i32, rmw_32, inst_32>;
+  defm : BinRMWPatGlobalAddrOffOnly<i64, rmw_64, inst_64>;
 }
 
 let Predicates = [HasAtomics] in {
-defm : BinRMWPattern<atomic_load_add_32, atomic_load_add_64, ATOMIC_RMW_ADD_I32,
-                     ATOMIC_RMW_ADD_I64>;
-defm : BinRMWPattern<atomic_load_sub_32, atomic_load_sub_64, ATOMIC_RMW_SUB_I32,
-                     ATOMIC_RMW_SUB_I64>;
-defm : BinRMWPattern<atomic_load_and_32, atomic_load_and_64, ATOMIC_RMW_AND_I32,
-                     ATOMIC_RMW_AND_I64>;
-defm : BinRMWPattern<atomic_load_or_32, atomic_load_or_64, ATOMIC_RMW_OR_I32,
-                     ATOMIC_RMW_OR_I64>;
-defm : BinRMWPattern<atomic_load_xor_32, atomic_load_xor_64, ATOMIC_RMW_XOR_I32,
-                     ATOMIC_RMW_XOR_I64>;
-defm : BinRMWPattern<atomic_swap_32, atomic_swap_64, ATOMIC_RMW_XCHG_I32,
-                     ATOMIC_RMW_XCHG_I64>;
+defm : BinRMWPattern<atomic_load_add_32, atomic_load_add_64, "ATOMIC_RMW_ADD_I32",
+                     "ATOMIC_RMW_ADD_I64">;
+defm : BinRMWPattern<atomic_load_sub_32, atomic_load_sub_64, "ATOMIC_RMW_SUB_I32",
+                     "ATOMIC_RMW_SUB_I64">;
+defm : BinRMWPattern<atomic_load_and_32, atomic_load_and_64, "ATOMIC_RMW_AND_I32",
+                     "ATOMIC_RMW_AND_I64">;
+defm : BinRMWPattern<atomic_load_or_32, atomic_load_or_64, "ATOMIC_RMW_OR_I32",
+                     "ATOMIC_RMW_OR_I64">;
+defm : BinRMWPattern<atomic_load_xor_32, atomic_load_xor_64, "ATOMIC_RMW_XOR_I32",
+                     "ATOMIC_RMW_XOR_I64">;
+defm : BinRMWPattern<atomic_swap_32, atomic_swap_64, "ATOMIC_RMW_XCHG_I32",
+                     "ATOMIC_RMW_XCHG_I64">;
 } // Predicates = [HasAtomics]
 
 // Truncating & zero-extending binary RMW patterns.
 // These are combined patterns of truncating store patterns and zero-extending
 // load patterns above.
 class zext_bin_rmw_8_32<PatFrag kind> :
   PatFrag<(ops node:$addr, node:$val),
           (and (i32 (kind node:$addr, node:$val)), 255)>;

 class sext_bin_rmw_16_64<PatFrag kind> : sext_bin_rmw_8_64<kind>;
 // 32->64 sext RMW gets selected as i32.atomic.rmw.***, i64.extend_i32_s
 
 // Patterns for various addressing modes for truncating-extending binary RMWs.
 multiclass BinRMWTruncExtPattern<
   PatFrag rmw_8, PatFrag rmw_16, PatFrag rmw_32, PatFrag rmw_64,
   NI inst8_32, NI inst16_32, NI inst8_64, NI inst16_64, NI inst32_64> {
   // Truncating-extending binary RMWs with no constant offset
-  def : BinRMWPatNoOffset<i32, zext_bin_rmw_8_32<rmw_8>, inst8_32>;
-  def : BinRMWPatNoOffset<i32, zext_bin_rmw_16_32<rmw_16>, inst16_32>;
-  def : BinRMWPatNoOffset<i64, zext_bin_rmw_8_64<rmw_8>, inst8_64>;
-  def : BinRMWPatNoOffset<i64, zext_bin_rmw_16_64<rmw_16>, inst16_64>;
-  def : BinRMWPatNoOffset<i64, zext_bin_rmw_32_64<rmw_32>, inst32_64>;
-
-  def : BinRMWPatNoOffset<i32, sext_bin_rmw_8_32<rmw_8>, inst8_32>;
-  def : BinRMWPatNoOffset<i32, sext_bin_rmw_16_32<rmw_16>, inst16_32>;
-  def : BinRMWPatNoOffset<i64, sext_bin_rmw_8_64<rmw_8>, inst8_64>;
-  def : BinRMWPatNoOffset<i64, sext_bin_rmw_16_64<rmw_16>, inst16_64>;
+  defm : BinRMWPatNoOffset<i32, zext_bin_rmw_8_32<rmw_8>, inst8_32>;
+  defm : BinRMWPatNoOffset<i32, zext_bin_rmw_16_32<rmw_16>, inst16_32>;
+  defm : BinRMWPatNoOffset<i64, zext_bin_rmw_8_64<rmw_8>, inst8_64>;
+  defm : BinRMWPatNoOffset<i64, zext_bin_rmw_16_64<rmw_16>, inst16_64>;
+  defm : BinRMWPatNoOffset<i64, zext_bin_rmw_32_64<rmw_32>, inst32_64>;
+
+  defm : BinRMWPatNoOffset<i32, sext_bin_rmw_8_32<rmw_8>, inst8_32>;
+  defm : BinRMWPatNoOffset<i32, sext_bin_rmw_16_32<rmw_16>, inst16_32>;
+  defm : BinRMWPatNoOffset<i64, sext_bin_rmw_8_64<rmw_8>, inst8_64>;
+  defm : BinRMWPatNoOffset<i64, sext_bin_rmw_16_64<rmw_16>, inst16_64>;
 
   // Truncating-extending binary RMWs with a constant offset
-  def : BinRMWPatImmOff<i32, zext_bin_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
-  def : BinRMWPatImmOff<i32, zext_bin_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
-  def : BinRMWPatImmOff<i64, zext_bin_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
-  def : BinRMWPatImmOff<i64, zext_bin_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
-  def : BinRMWPatImmOff<i64, zext_bin_rmw_32_64<rmw_32>, regPlusImm, inst32_64>;
-  def : BinRMWPatImmOff<i32, zext_bin_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
-  def : BinRMWPatImmOff<i32, zext_bin_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
-  def : BinRMWPatImmOff<i64, zext_bin_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
-  def : BinRMWPatImmOff<i64, zext_bin_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
-  def : BinRMWPatImmOff<i64, zext_bin_rmw_32_64<rmw_32>, or_is_add, inst32_64>;
-
-  def : BinRMWPatImmOff<i32, sext_bin_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
-  def : BinRMWPatImmOff<i32, sext_bin_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
-  def : BinRMWPatImmOff<i64, sext_bin_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
-  def : BinRMWPatImmOff<i64, sext_bin_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
-  def : BinRMWPatImmOff<i32, sext_bin_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
-  def : BinRMWPatImmOff<i32, sext_bin_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
-  def : BinRMWPatImmOff<i64, sext_bin_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
-  def : BinRMWPatImmOff<i64, sext_bin_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
+  defm : BinRMWPatImmOff<i32, zext_bin_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
+  defm : BinRMWPatImmOff<i32, zext_bin_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
+  defm : BinRMWPatImmOff<i64, zext_bin_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
+  defm : BinRMWPatImmOff<i64, zext_bin_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
+  defm : BinRMWPatImmOff<i64, zext_bin_rmw_32_64<rmw_32>, regPlusImm, inst32_64>;
+  defm : BinRMWPatImmOff<i32, zext_bin_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
+  defm : BinRMWPatImmOff<i32, zext_bin_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
+  defm : BinRMWPatImmOff<i64, zext_bin_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
+  defm : BinRMWPatImmOff<i64, zext_bin_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
+  defm : BinRMWPatImmOff<i64, zext_bin_rmw_32_64<rmw_32>, or_is_add, inst32_64>;
+
+  defm : BinRMWPatImmOff<i32, sext_bin_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
+  defm : BinRMWPatImmOff<i32, sext_bin_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
+  defm : BinRMWPatImmOff<i64, sext_bin_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
+  defm : BinRMWPatImmOff<i64, sext_bin_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
+  defm : BinRMWPatImmOff<i32, sext_bin_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
+  defm : BinRMWPatImmOff<i32, sext_bin_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
+  defm : BinRMWPatImmOff<i64, sext_bin_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
+  defm : BinRMWPatImmOff<i64, sext_bin_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
 
   // Truncating-extending binary RMWs with just a constant offset
-  def : BinRMWPatOffsetOnly<i32, zext_bin_rmw_8_32<rmw_8>, inst8_32>;
-  def : BinRMWPatOffsetOnly<i32, zext_bin_rmw_16_32<rmw_16>, inst16_32>;
-  def : BinRMWPatOffsetOnly<i64, zext_bin_rmw_8_64<rmw_8>, inst8_64>;
-  def : BinRMWPatOffsetOnly<i64, zext_bin_rmw_16_64<rmw_16>, inst16_64>;
-  def : BinRMWPatOffsetOnly<i64, zext_bin_rmw_32_64<rmw_32>, inst32_64>;
-
-  def : BinRMWPatOffsetOnly<i32, sext_bin_rmw_8_32<rmw_8>, inst8_32>;
-  def : BinRMWPatOffsetOnly<i32, sext_bin_rmw_16_32<rmw_16>, inst16_32>;
-  def : BinRMWPatOffsetOnly<i64, sext_bin_rmw_8_64<rmw_8>, inst8_64>;
-  def : BinRMWPatOffsetOnly<i64, sext_bin_rmw_16_64<rmw_16>, inst16_64>;
-
-  def : BinRMWPatGlobalAddrOffOnly<i32, zext_bin_rmw_8_32<rmw_8>, inst8_32>;
-  def : BinRMWPatGlobalAddrOffOnly<i32, zext_bin_rmw_16_32<rmw_16>, inst16_32>;
-  def : BinRMWPatGlobalAddrOffOnly<i64, zext_bin_rmw_8_64<rmw_8>, inst8_64>;
-  def : BinRMWPatGlobalAddrOffOnly<i64, zext_bin_rmw_16_64<rmw_16>, inst16_64>;
-  def : BinRMWPatGlobalAddrOffOnly<i64, zext_bin_rmw_32_64<rmw_32>, inst32_64>;
-
-  def : BinRMWPatGlobalAddrOffOnly<i32, sext_bin_rmw_8_32<rmw_8>, inst8_32>;
-  def : BinRMWPatGlobalAddrOffOnly<i32, sext_bin_rmw_16_32<rmw_16>, inst16_32>;
-  def : BinRMWPatGlobalAddrOffOnly<i64, sext_bin_rmw_8_64<rmw_8>, inst8_64>;
-  def : BinRMWPatGlobalAddrOffOnly<i64, sext_bin_rmw_16_64<rmw_16>, inst16_64>;
+  defm : BinRMWPatOffsetOnly<i32, zext_bin_rmw_8_32<rmw_8>, inst8_32>;
+  defm : BinRMWPatOffsetOnly<i32, zext_bin_rmw_16_32<rmw_16>, inst16_32>;
+  defm : BinRMWPatOffsetOnly<i64, zext_bin_rmw_8_64<rmw_8>, inst8_64>;
+  defm : BinRMWPatOffsetOnly<i64, zext_bin_rmw_16_64<rmw_16>, inst16_64>;
+  defm : BinRMWPatOffsetOnly<i64, zext_bin_rmw_32_64<rmw_32>, inst32_64>;
+
+  defm : BinRMWPatOffsetOnly<i32, sext_bin_rmw_8_32<rmw_8>, inst8_32>;
+  defm : BinRMWPatOffsetOnly<i32, sext_bin_rmw_16_32<rmw_16>, inst16_32>;
+  defm : BinRMWPatOffsetOnly<i64, sext_bin_rmw_8_64<rmw_8>, inst8_64>;
+  defm : BinRMWPatOffsetOnly<i64, sext_bin_rmw_16_64<rmw_16>, inst16_64>;
+
+  defm : BinRMWPatGlobalAddrOffOnly<i32, zext_bin_rmw_8_32<rmw_8>, inst8_32>;
+  defm : BinRMWPatGlobalAddrOffOnly<i32, zext_bin_rmw_16_32<rmw_16>, inst16_32>;
+  defm : BinRMWPatGlobalAddrOffOnly<i64, zext_bin_rmw_8_64<rmw_8>, inst8_64>;
+  defm : BinRMWPatGlobalAddrOffOnly<i64, zext_bin_rmw_16_64<rmw_16>, inst16_64>;
+  defm : BinRMWPatGlobalAddrOffOnly<i64, zext_bin_rmw_32_64<rmw_32>, inst32_64>;
+
+  defm : BinRMWPatGlobalAddrOffOnly<i32, sext_bin_rmw_8_32<rmw_8>, inst8_32>;
+  defm : BinRMWPatGlobalAddrOffOnly<i32, sext_bin_rmw_16_32<rmw_16>, inst16_32>;
+  defm : BinRMWPatGlobalAddrOffOnly<i64, sext_bin_rmw_8_64<rmw_8>, inst8_64>;
+  defm : BinRMWPatGlobalAddrOffOnly<i64, sext_bin_rmw_16_64<rmw_16>, inst16_64>;
 }
 
 let Predicates = [HasAtomics] in {
 defm : BinRMWTruncExtPattern<
   atomic_load_add_8, atomic_load_add_16, atomic_load_add_32, atomic_load_add_64,
-  ATOMIC_RMW8_U_ADD_I32, ATOMIC_RMW16_U_ADD_I32,
-  ATOMIC_RMW8_U_ADD_I64, ATOMIC_RMW16_U_ADD_I64, ATOMIC_RMW32_U_ADD_I64>;
+  "ATOMIC_RMW8_U_ADD_I32", "ATOMIC_RMW16_U_ADD_I32",
+  "ATOMIC_RMW8_U_ADD_I64", "ATOMIC_RMW16_U_ADD_I64", "ATOMIC_RMW32_U_ADD_I64">;
 defm : BinRMWTruncExtPattern<
   atomic_load_sub_8, atomic_load_sub_16, atomic_load_sub_32, atomic_load_sub_64,
-  ATOMIC_RMW8_U_SUB_I32, ATOMIC_RMW16_U_SUB_I32,
-  ATOMIC_RMW8_U_SUB_I64, ATOMIC_RMW16_U_SUB_I64, ATOMIC_RMW32_U_SUB_I64>;
+  "ATOMIC_RMW8_U_SUB_I32", "ATOMIC_RMW16_U_SUB_I32",
+  "ATOMIC_RMW8_U_SUB_I64", "ATOMIC_RMW16_U_SUB_I64", "ATOMIC_RMW32_U_SUB_I64">;
 defm : BinRMWTruncExtPattern<
   atomic_load_and_8, atomic_load_and_16, atomic_load_and_32, atomic_load_and_64,
-  ATOMIC_RMW8_U_AND_I32, ATOMIC_RMW16_U_AND_I32,
-  ATOMIC_RMW8_U_AND_I64, ATOMIC_RMW16_U_AND_I64, ATOMIC_RMW32_U_AND_I64>;
+  "ATOMIC_RMW8_U_AND_I32", "ATOMIC_RMW16_U_AND_I32",
+  "ATOMIC_RMW8_U_AND_I64", "ATOMIC_RMW16_U_AND_I64", "ATOMIC_RMW32_U_AND_I64">;
 defm : BinRMWTruncExtPattern<
   atomic_load_or_8, atomic_load_or_16, atomic_load_or_32, atomic_load_or_64,
-  ATOMIC_RMW8_U_OR_I32, ATOMIC_RMW16_U_OR_I32,
-  ATOMIC_RMW8_U_OR_I64, ATOMIC_RMW16_U_OR_I64, ATOMIC_RMW32_U_OR_I64>;
+  "ATOMIC_RMW8_U_OR_I32", "ATOMIC_RMW16_U_OR_I32",
+  "ATOMIC_RMW8_U_OR_I64", "ATOMIC_RMW16_U_OR_I64", "ATOMIC_RMW32_U_OR_I64">;
 defm : BinRMWTruncExtPattern<
   atomic_load_xor_8, atomic_load_xor_16, atomic_load_xor_32, atomic_load_xor_64,
-  ATOMIC_RMW8_U_XOR_I32, ATOMIC_RMW16_U_XOR_I32,
-  ATOMIC_RMW8_U_XOR_I64, ATOMIC_RMW16_U_XOR_I64, ATOMIC_RMW32_U_XOR_I64>;
+  "ATOMIC_RMW8_U_XOR_I32", "ATOMIC_RMW16_U_XOR_I32",
+  "ATOMIC_RMW8_U_XOR_I64", "ATOMIC_RMW16_U_XOR_I64", "ATOMIC_RMW32_U_XOR_I64">;
 defm : BinRMWTruncExtPattern<
   atomic_swap_8, atomic_swap_16, atomic_swap_32, atomic_swap_64,
-  ATOMIC_RMW8_U_XCHG_I32, ATOMIC_RMW16_U_XCHG_I32,
-  ATOMIC_RMW8_U_XCHG_I64, ATOMIC_RMW16_U_XCHG_I64, ATOMIC_RMW32_U_XCHG_I64>;
+  "ATOMIC_RMW8_U_XCHG_I32", "ATOMIC_RMW16_U_XCHG_I32",
+  "ATOMIC_RMW8_U_XCHG_I64", "ATOMIC_RMW16_U_XCHG_I64", "ATOMIC_RMW32_U_XCHG_I64">;
 } // Predicates = [HasAtomics]
 
 //===----------------------------------------------------------------------===//
 // Atomic ternary read-modify-writes
 //===----------------------------------------------------------------------===//
 
 // TODO LLVM IR's cmpxchg instruction returns a pair of {loaded value, success
 // flag}. When we use the success flag or both values, we can't make use of i64
 // truncate/extend versions of instructions for now, which is suboptimal.
 // Consider adding a pass after instruction selection that optimizes this case
 // if it is frequent.
 
 multiclass WebAssemblyTerRMW<WebAssemblyRegClass rc, string name,
                              int atomic_op> {
-  defm "" :
+  defm "_A32" :
     ATOMIC_I<(outs rc:$dst),
              (ins P2Align:$p2align, offset32_op:$off, I32:$addr, rc:$exp,
                   rc:$new_),
              (outs), (ins P2Align:$p2align, offset32_op:$off), [],
              !strconcat(name, "\t$dst, ${off}(${addr})${p2align}, $exp, $new_"),
              !strconcat(name, "\t${off}${p2align}"), atomic_op>;
+  defm "_A64" :
+    ATOMIC_I<(outs rc:$dst),
+             (ins P2Align:$p2align, offset64_op:$off, I64:$addr, rc:$exp,
+                  rc:$new_),
+             (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+             !strconcat(name, "\t$dst, ${off}(${addr})${p2align}, $exp, $new_"),
+             !strconcat(name, "\t${off}${p2align}"), atomic_op>;
 }
 
 defm ATOMIC_RMW_CMPXCHG_I32 :
   WebAssemblyTerRMW<I32, "i32.atomic.rmw.cmpxchg", 0x48>;
 defm ATOMIC_RMW_CMPXCHG_I64 :
   WebAssemblyTerRMW<I64, "i64.atomic.rmw.cmpxchg", 0x49>;
 defm ATOMIC_RMW8_U_CMPXCHG_I32 :
   WebAssemblyTerRMW<I32, "i32.atomic.rmw8.cmpxchg_u", 0x4a>;
 defm ATOMIC_RMW16_U_CMPXCHG_I32 :
   WebAssemblyTerRMW<I32, "i32.atomic.rmw16.cmpxchg_u", 0x4b>;
 defm ATOMIC_RMW8_U_CMPXCHG_I64 :
   WebAssemblyTerRMW<I64, "i64.atomic.rmw8.cmpxchg_u", 0x4c>;
 defm ATOMIC_RMW16_U_CMPXCHG_I64 :
   WebAssemblyTerRMW<I64, "i64.atomic.rmw16.cmpxchg_u", 0x4d>;
 defm ATOMIC_RMW32_U_CMPXCHG_I64 :
   WebAssemblyTerRMW<I64, "i64.atomic.rmw32.cmpxchg_u", 0x4e>;
 
 // Select ternary RMWs with no constant offset.
-class TerRMWPatNoOffset<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind I32:$addr, ty:$exp, ty:$new)),
-      (inst 0, 0, I32:$addr, ty:$exp, ty:$new)>;
+multiclass TerRMWPatNoOffset<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind I32:$addr, ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A32) 0, 0, I32:$addr, ty:$exp, ty:$new)>;
+  def : Pat<(ty (kind I64:$addr, ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A64) 0, 0, I64:$addr, ty:$exp, ty:$new)>;
+}
 
 // Select ternary RMWs with a constant offset.
 
 // Pattern with address + immediate offset
-class TerRMWPatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :
-  Pat<(ty (kind (operand I32:$addr, imm:$off), ty:$exp, ty:$new)),
-      (inst 0, imm:$off, I32:$addr, ty:$exp, ty:$new)>;
+multiclass TerRMWPatImmOff<ValueType ty, PatFrag kind, PatFrag operand, string inst> {
+  def : Pat<(ty (kind (operand I32:$addr, imm:$off), ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A32) 0, imm:$off, I32:$addr, ty:$exp, ty:$new)>;
+  def : Pat<(ty (kind (operand I64:$addr, imm:$off), ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A64) 0, imm:$off, I64:$addr, ty:$exp, ty:$new)>;
+}
 
 // Select ternary RMWs with just a constant offset.
-class TerRMWPatOffsetOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind imm:$off, ty:$exp, ty:$new)),
-      (inst 0, imm:$off, (CONST_I32 0), ty:$exp, ty:$new)>;
-
-class TerRMWPatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off), ty:$exp, ty:$new)),
-      (inst 0, tglobaladdr:$off, (CONST_I32 0), ty:$exp, ty:$new)>;
+multiclass TerRMWPatOffsetOnly<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind imm:$off, ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A32) 0, imm:$off, (CONST_I32 0), ty:$exp, ty:$new)>;
+  def : Pat<(ty (kind imm:$off, ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A64) 0, imm:$off, (CONST_I64 0), ty:$exp, ty:$new)>;
+}
+
+multiclass TerRMWPatGlobalAddrOffOnly<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off), ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A32) 0, tglobaladdr:$off, (CONST_I32 0), ty:$exp, ty:$new)>;
+  def : Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off), ty:$exp, ty:$new)),
+            (!cast<NI>(inst#_A64) 0, tglobaladdr:$off, (CONST_I64 0), ty:$exp, ty:$new)>;
+}
 
 // Patterns for various addressing modes.
-multiclass TerRMWPattern<PatFrag rmw_32, PatFrag rmw_64, NI inst_32,
-                         NI inst_64> {
-  def : TerRMWPatNoOffset<i32, rmw_32, inst_32>;
-  def : TerRMWPatNoOffset<i64, rmw_64, inst_64>;
-
-  def : TerRMWPatImmOff<i32, rmw_32, regPlusImm, inst_32>;
-  def : TerRMWPatImmOff<i64, rmw_64, regPlusImm, inst_64>;
-  def : TerRMWPatImmOff<i32, rmw_32, or_is_add, inst_32>;
-  def : TerRMWPatImmOff<i64, rmw_64, or_is_add, inst_64>;
+multiclass TerRMWPattern<PatFrag rmw_32, PatFrag rmw_64, string inst_32,
+                         string inst_64> {
+  defm : TerRMWPatNoOffset<i32, rmw_32, inst_32>;
+  defm : TerRMWPatNoOffset<i64, rmw_64, inst_64>;
+
+  defm : TerRMWPatImmOff<i32, rmw_32, regPlusImm, inst_32>;
+  defm : TerRMWPatImmOff<i64, rmw_64, regPlusImm, inst_64>;
+  defm : TerRMWPatImmOff<i32, rmw_32, or_is_add, inst_32>;
+  defm : TerRMWPatImmOff<i64, rmw_64, or_is_add, inst_64>;
 
-  def : TerRMWPatOffsetOnly<i32, rmw_32, inst_32>;
-  def : TerRMWPatOffsetOnly<i64, rmw_64, inst_64>;
+  defm : TerRMWPatOffsetOnly<i32, rmw_32, inst_32>;
+  defm : TerRMWPatOffsetOnly<i64, rmw_64, inst_64>;
 
-  def : TerRMWPatGlobalAddrOffOnly<i32, rmw_32, inst_32>;
-  def : TerRMWPatGlobalAddrOffOnly<i64, rmw_64, inst_64>;
+  defm : TerRMWPatGlobalAddrOffOnly<i32, rmw_32, inst_32>;
+  defm : TerRMWPatGlobalAddrOffOnly<i64, rmw_64, inst_64>;
 }
 
 let Predicates = [HasAtomics] in
 defm : TerRMWPattern<atomic_cmp_swap_32, atomic_cmp_swap_64,
-                     ATOMIC_RMW_CMPXCHG_I32, ATOMIC_RMW_CMPXCHG_I64>;
+                     "ATOMIC_RMW_CMPXCHG_I32", "ATOMIC_RMW_CMPXCHG_I64">;
 
 // Truncating & zero-extending ternary RMW patterns.
 // DAG legalization & optimization before instruction selection may introduce
 // additional nodes such as anyext or assertzext depending on operand types.
 class zext_ter_rmw_8_32<PatFrag kind> :
   PatFrag<(ops node:$addr, node:$exp, node:$new),
           (and (i32 (kind node:$addr, node:$exp, node:$new)), 255)>;
 class zext_ter_rmw_16_32<PatFrag kind> :
PatFrag<(ops node:$addr, node:$exp, node:$new),
                   (i32 (trunc (i64 node:$exp))),
                   (i32 (trunc (i64 node:$new))))))))>;
 class sext_ter_rmw_16_64<PatFrag kind> : sext_ter_rmw_8_64<kind>;
 // 32->64 sext RMW gets selected as i32.atomic.rmw.***, i64.extend_i32_s
 
 // Patterns for various addressing modes for truncating-extending ternary RMWs.
 multiclass TerRMWTruncExtPattern<
   PatFrag rmw_8, PatFrag rmw_16, PatFrag rmw_32, PatFrag rmw_64,
-  NI inst8_32, NI inst16_32, NI inst8_64, NI inst16_64, NI inst32_64> {
+  string inst8_32, string inst16_32, string inst8_64, string inst16_64, string inst32_64> {
   // Truncating-extending ternary RMWs with no constant offset
-  def : TerRMWPatNoOffset<i32, zext_ter_rmw_8_32<rmw_8>, inst8_32>;
-  def : TerRMWPatNoOffset<i32, zext_ter_rmw_16_32<rmw_16>, inst16_32>;
-  def : TerRMWPatNoOffset<i64, zext_ter_rmw_8_64<rmw_8>, inst8_64>;
-  def : TerRMWPatNoOffset<i64, zext_ter_rmw_16_64<rmw_16>, inst16_64>;
-  def : TerRMWPatNoOffset<i64, zext_ter_rmw_32_64<rmw_32>, inst32_64>;
-
-  def : TerRMWPatNoOffset<i32, sext_ter_rmw_8_32<rmw_8>, inst8_32>;
-  def : TerRMWPatNoOffset<i32, sext_ter_rmw_16_32<rmw_16>, inst16_32>;
-  def : TerRMWPatNoOffset<i64, sext_ter_rmw_8_64<rmw_8>, inst8_64>;
-  def : TerRMWPatNoOffset<i64, sext_ter_rmw_16_64<rmw_16>, inst16_64>;
+  defm : TerRMWPatNoOffset<i32, zext_ter_rmw_8_32<rmw_8>, inst8_32>;
+  defm : TerRMWPatNoOffset<i32, zext_ter_rmw_16_32<rmw_16>, inst16_32>;
+  defm : TerRMWPatNoOffset<i64, zext_ter_rmw_8_64<rmw_8>, inst8_64>;
+  defm : TerRMWPatNoOffset<i64, zext_ter_rmw_16_64<rmw_16>, inst16_64>;
+  defm : TerRMWPatNoOffset<i64, zext_ter_rmw_32_64<rmw_32>, inst32_64>;
+
+  defm : TerRMWPatNoOffset<i32, sext_ter_rmw_8_32<rmw_8>, inst8_32>;
+  defm : TerRMWPatNoOffset<i32, sext_ter_rmw_16_32<rmw_16>, inst16_32>;
+  defm : TerRMWPatNoOffset<i64, sext_ter_rmw_8_64<rmw_8>, inst8_64>;
+  defm : TerRMWPatNoOffset<i64, sext_ter_rmw_16_64<rmw_16>, inst16_64>;
 
   // Truncating-extending ternary RMWs with a constant offset
-  def : TerRMWPatImmOff<i32, zext_ter_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
-  def : TerRMWPatImmOff<i32, zext_ter_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
-  def : TerRMWPatImmOff<i64, zext_ter_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
-  def : TerRMWPatImmOff<i64, zext_ter_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
-  def : TerRMWPatImmOff<i64, zext_ter_rmw_32_64<rmw_32>, regPlusImm, inst32_64>;
-  def : TerRMWPatImmOff<i32, zext_ter_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
-  def : TerRMWPatImmOff<i32, zext_ter_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
-  def : TerRMWPatImmOff<i64, zext_ter_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
-  def : TerRMWPatImmOff<i64, zext_ter_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
-  def : TerRMWPatImmOff<i64, zext_ter_rmw_32_64<rmw_32>, or_is_add, inst32_64>;
-
-  def : TerRMWPatImmOff<i32, sext_ter_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
-  def : TerRMWPatImmOff<i32, sext_ter_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
-  def : TerRMWPatImmOff<i64, sext_ter_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
-  def : TerRMWPatImmOff<i64, sext_ter_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
-  def : TerRMWPatImmOff<i32, sext_ter_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
-  def : TerRMWPatImmOff<i32, sext_ter_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
-  def : TerRMWPatImmOff<i64, sext_ter_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
-  def : TerRMWPatImmOff<i64, sext_ter_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
+  defm : TerRMWPatImmOff<i32, zext_ter_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
+  defm : TerRMWPatImmOff<i32, zext_ter_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
+  defm : TerRMWPatImmOff<i64, zext_ter_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
+  defm : TerRMWPatImmOff<i64, zext_ter_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
+  defm : TerRMWPatImmOff<i64, zext_ter_rmw_32_64<rmw_32>, regPlusImm, inst32_64>;
+  defm : TerRMWPatImmOff<i32, zext_ter_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
+  defm : TerRMWPatImmOff<i32, zext_ter_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
+  defm : TerRMWPatImmOff<i64, zext_ter_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
+  defm : TerRMWPatImmOff<i64, zext_ter_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
+  defm : TerRMWPatImmOff<i64, zext_ter_rmw_32_64<rmw_32>, or_is_add, inst32_64>;
+
+  defm : TerRMWPatImmOff<i32, sext_ter_rmw_8_32<rmw_8>, regPlusImm, inst8_32>;
+  defm : TerRMWPatImmOff<i32, sext_ter_rmw_16_32<rmw_16>, regPlusImm, inst16_32>;
+  defm : TerRMWPatImmOff<i64, sext_ter_rmw_8_64<rmw_8>, regPlusImm, inst8_64>;
+  defm : TerRMWPatImmOff<i64, sext_ter_rmw_16_64<rmw_16>, regPlusImm, inst16_64>;
+  defm : TerRMWPatImmOff<i32, sext_ter_rmw_8_32<rmw_8>, or_is_add, inst8_32>;
+  defm : TerRMWPatImmOff<i32, sext_ter_rmw_16_32<rmw_16>, or_is_add, inst16_32>;
+  defm : TerRMWPatImmOff<i64, sext_ter_rmw_8_64<rmw_8>, or_is_add, inst8_64>;
+  defm : TerRMWPatImmOff<i64, sext_ter_rmw_16_64<rmw_16>, or_is_add, inst16_64>;
 
   // Truncating-extending ternary RMWs with just a constant offset
-  def : TerRMWPatOffsetOnly<i32, zext_ter_rmw_8_32<rmw_8>, inst8_32>;
-  def : TerRMWPatOffsetOnly<i32, zext_ter_rmw_16_32<rmw_16>, inst16_32>;
-  def : TerRMWPatOffsetOnly<i64, zext_ter_rmw_8_64<rmw_8>, inst8_64>;
-  def : TerRMWPatOffsetOnly<i64, zext_ter_rmw_16_64<rmw_16>, inst16_64>;
-  def : TerRMWPatOffsetOnly<i64, zext_ter_rmw_32_64<rmw_32>, inst32_64>;
-
-  def : TerRMWPatOffsetOnly<i32, sext_ter_rmw_8_32<rmw_8>, inst8_32>;
-  def : TerRMWPatOffsetOnly<i32, sext_ter_rmw_16_32<rmw_16>, inst16_32>;
-  def : TerRMWPatOffsetOnly<i64, sext_ter_rmw_8_64<rmw_8>, inst8_64>;
-  def : TerRMWPatOffsetOnly<i64, sext_ter_rmw_16_64<rmw_16>, inst16_64>;
-
-  def : TerRMWPatGlobalAddrOffOnly<i32, zext_ter_rmw_8_32<rmw_8>, inst8_32>;
-  def : TerRMWPatGlobalAddrOffOnly<i32, zext_ter_rmw_16_32<rmw_16>, inst16_32>;
-  def : TerRMWPatGlobalAddrOffOnly<i64, zext_ter_rmw_8_64<rmw_8>, inst8_64>;
-  def : TerRMWPatGlobalAddrOffOnly<i64, zext_ter_rmw_16_64<rmw_16>, inst16_64>;
-  def : TerRMWPatGlobalAddrOffOnly<i64, zext_ter_rmw_32_64<rmw_32>, inst32_64>;
-
-  def : TerRMWPatGlobalAddrOffOnly<i32, sext_ter_rmw_8_32<rmw_8>, inst8_32>;
-  def : TerRMWPatGlobalAddrOffOnly<i32, sext_ter_rmw_16_32<rmw_16>, inst16_32>;
-  def : TerRMWPatGlobalAddrOffOnly<i64, sext_ter_rmw_8_64<rmw_8>, inst8_64>;
-  def : TerRMWPatGlobalAddrOffOnly<i64, sext_ter_rmw_16_64<rmw_16>, inst16_64>;
+  defm : TerRMWPatOffsetOnly<i32, zext_ter_rmw_8_32<rmw_8>, inst8_32>;
+  defm : TerRMWPatOffsetOnly<i32, zext_ter_rmw_16_32<rmw_16>, inst16_32>;
+  defm : TerRMWPatOffsetOnly<i64, zext_ter_rmw_8_64<rmw_8>, inst8_64>;
+  defm : TerRMWPatOffsetOnly<i64, zext_ter_rmw_16_64<rmw_16>, inst16_64>;
+  defm : TerRMWPatOffsetOnly<i64, zext_ter_rmw_32_64<rmw_32>, inst32_64>;
+
+  defm : TerRMWPatOffsetOnly<i32, sext_ter_rmw_8_32<rmw_8>, inst8_32>;
+  defm : TerRMWPatOffsetOnly<i32, sext_ter_rmw_16_32<rmw_16>, inst16_32>;
+  defm : TerRMWPatOffsetOnly<i64, sext_ter_rmw_8_64<rmw_8>, inst8_64>;
+  defm : TerRMWPatOffsetOnly<i64, sext_ter_rmw_16_64<rmw_16>, inst16_64>;
+
+  defm : TerRMWPatGlobalAddrOffOnly<i32, zext_ter_rmw_8_32<rmw_8>, inst8_32>;
+  defm : TerRMWPatGlobalAddrOffOnly<i32, zext_ter_rmw_16_32<rmw_16>, inst16_32>;
+  defm : TerRMWPatGlobalAddrOffOnly<i64, zext_ter_rmw_8_64<rmw_8>, inst8_64>;
+  defm : TerRMWPatGlobalAddrOffOnly<i64, zext_ter_rmw_16_64<rmw_16>, inst16_64>;
+  defm : TerRMWPatGlobalAddrOffOnly<i64, zext_ter_rmw_32_64<rmw_32>, inst32_64>;
+
+  defm : TerRMWPatGlobalAddrOffOnly<i32, sext_ter_rmw_8_32<rmw_8>, inst8_32>;
+  defm : TerRMWPatGlobalAddrOffOnly<i32, sext_ter_rmw_16_32<rmw_16>, inst16_32>;
+  defm : TerRMWPatGlobalAddrOffOnly<i64, sext_ter_rmw_8_64<rmw_8>, inst8_64>;
+  defm : TerRMWPatGlobalAddrOffOnly<i64, sext_ter_rmw_16_64<rmw_16>, inst16_64>;
 }
 
 let Predicates = [HasAtomics] in
 defm : TerRMWTruncExtPattern<
   atomic_cmp_swap_8, atomic_cmp_swap_16, atomic_cmp_swap_32, atomic_cmp_swap_64,
-  ATOMIC_RMW8_U_CMPXCHG_I32, ATOMIC_RMW16_U_CMPXCHG_I32,
-  ATOMIC_RMW8_U_CMPXCHG_I64, ATOMIC_RMW16_U_CMPXCHG_I64,
-  ATOMIC_RMW32_U_CMPXCHG_I64>;
+  "ATOMIC_RMW8_U_CMPXCHG_I32", "ATOMIC_RMW16_U_CMPXCHG_I32",
+  "ATOMIC_RMW8_U_CMPXCHG_I64", "ATOMIC_RMW16_U_CMPXCHG_I64",
+  "ATOMIC_RMW32_U_CMPXCHG_I64">;

llvm/lib/Target/WebAssembly/WebAssemblyInstrInfo.td

 def vec_i64imm_op : Operand<i64>;
 
 let OperandType = "OPERAND_FUNCTION32" in
 def function32_op : Operand<i32>;
 
 let OperandType = "OPERAND_OFFSET32" in
 def offset32_op : Operand<i32>;
 
+let OperandType = "OPERAND_OFFSET64" in
+def offset64_op : Operand<i64>;
+
 let OperandType = "OPERAND_P2ALIGN" in {
 def P2Align : Operand<i32> {
   let PrintMethod = "printWebAssemblyP2AlignOperand";
 }
 
 let OperandType = "OPERAND_EVENT" in
 def event_op : Operand<i32>;
 

llvm/lib/Target/WebAssembly/WebAssemblyInstrMemory.td

 // WebAssemblyInstrMemory.td-WebAssembly Memory codegen support -*- tablegen -*-
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// WebAssembly Memory operand code-gen constructs.
 ///
 //===----------------------------------------------------------------------===//
 
 // TODO:
-//  - HasAddr64
 //  - WebAssemblyTargetLowering having to do with atomics
 //  - Each has optional alignment.
 
 // WebAssembly has i8/i16/i32/i64/f32/f64 memory types, but doesn't have i8/i16
 // local types. These memory-only types instead zero- or sign-extend into local
 // types when loading, and truncate when storing.
 
 // WebAssembly constant offsets are performed as unsigned with infinite
def or_is_add : PatFrag<(ops node:$lhs, node:$rhs), (or node:$lhs, node:$rhs),[{
   KnownBits Known1 = CurDAG->computeKnownBits(N->getOperand(1), 0);
   return (~Known0.Zero & ~Known1.Zero) == 0;
 }]>;
 
 // We don't need a regPlusES because external symbols never have constant
 // offsets folded into them, so we can just use add.
 
 // Defines atomic and non-atomic loads, regular and extending.
-multiclass WebAssemblyLoad<WebAssemblyRegClass rc, string Name, int Opcode> {
-  let mayLoad = 1, UseNamedOperandTable = 1 in
-  defm "": I<(outs rc:$dst),
+multiclass WebAssemblyLoad<WebAssemblyRegClass rc, string Name, int Opcode,
+                           list<Predicate> reqs> {
+  let mayLoad = 1, UseNamedOperandTable = 1 in {
+  defm "_A32": I<(outs rc:$dst),
                  (ins P2Align:$p2align, offset32_op:$off, I32:$addr),
                  (outs), (ins P2Align:$p2align, offset32_op:$off),
                  [], !strconcat(Name, "\t$dst, ${off}(${addr})${p2align}"),
-             !strconcat(Name, "\t${off}${p2align}"), Opcode>;
+                 !strconcat(Name, "\t${off}${p2align}"), Opcode>,
+               Requires<reqs>;
+  defm "_A64": I<(outs rc:$dst),
+                 (ins P2Align:$p2align, offset64_op:$off, I64:$addr),
+                 (outs), (ins P2Align:$p2align, offset64_op:$off),
+                 [], !strconcat(Name, "\t$dst, ${off}(${addr})${p2align}"),
+                 !strconcat(Name, "\t${off}${p2align}"), Opcode>,
+               Requires<!listconcat(reqs, [HasAddr64])>;
+  }
 }
 
 // Basic load.
 // FIXME: When we can break syntax compatibility, reorder the fields in the
 // asmstrings to match the binary encoding.
-defm LOAD_I32 : WebAssemblyLoad<I32, "i32.load", 0x28>;
-defm LOAD_I64 : WebAssemblyLoad<I64, "i64.load", 0x29>;
-defm LOAD_F32 : WebAssemblyLoad<F32, "f32.load", 0x2a>;
-defm LOAD_F64 : WebAssemblyLoad<F64, "f64.load", 0x2b>;
+defm LOAD_I32 : WebAssemblyLoad<I32, "i32.load", 0x28, []>;
+defm LOAD_I64 : WebAssemblyLoad<I64, "i64.load", 0x29, []>;
+defm LOAD_F32 : WebAssemblyLoad<F32, "f32.load", 0x2a, []>;
+defm LOAD_F64 : WebAssemblyLoad<F64, "f64.load", 0x2b, []>;
 
 // Select loads with no constant offset.
-class LoadPatNoOffset<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind I32:$addr)), (inst 0, 0, I32:$addr)>;
-
-def : LoadPatNoOffset<i32, load, LOAD_I32>;
-def : LoadPatNoOffset<i64, load, LOAD_I64>;
-def : LoadPatNoOffset<f32, load, LOAD_F32>;
-def : LoadPatNoOffset<f64, load, LOAD_F64>;
+multiclass LoadPatNoOffset<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind I32:$addr)), (!cast<NI>(inst # "_A32") 0, 0, I32:$addr)>;
+  def : Pat<(ty (kind I64:$addr)), (!cast<NI>(inst # "_A64") 0, 0, I64:$addr)>;
+}
 
+defm : LoadPatNoOffset<i32, load, "LOAD_I32">;
+defm : LoadPatNoOffset<i64, load, "LOAD_I64">;
+defm : LoadPatNoOffset<f32, load, "LOAD_F32">;
+defm : LoadPatNoOffset<f64, load, "LOAD_F64">;
 
 // Select loads with a constant offset.
 
 // Pattern with address + immediate offset
-class LoadPatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :
-  Pat<(ty (kind (operand I32:$addr, imm:$off))), (inst 0, imm:$off, I32:$addr)>;
+multiclass LoadPatImmOff<ValueType ty, PatFrag kind, PatFrag operand,
+                         string inst> {
+  def : Pat<(ty (kind (operand I32:$addr, imm:$off))),
+            (!cast<NI>(inst # "_A32") 0, imm:$off, I32:$addr)>;
+  def : Pat<(ty (kind (operand I64:$addr, imm:$off))),
+            (!cast<NI>(inst # "_A64") 0, imm:$off, I64:$addr)>;
+}
 
-def : LoadPatImmOff<i32, load, regPlusImm, LOAD_I32>;
-def : LoadPatImmOff<i64, load, regPlusImm, LOAD_I64>;
-def : LoadPatImmOff<f32, load, regPlusImm, LOAD_F32>;
-def : LoadPatImmOff<f64, load, regPlusImm, LOAD_F64>;
-def : LoadPatImmOff<i32, load, or_is_add, LOAD_I32>;
-def : LoadPatImmOff<i64, load, or_is_add, LOAD_I64>;
-def : LoadPatImmOff<f32, load, or_is_add, LOAD_F32>;
-def : LoadPatImmOff<f64, load, or_is_add, LOAD_F64>;
+defm : LoadPatImmOff<i32, load, regPlusImm, "LOAD_I32">;
+defm : LoadPatImmOff<i64, load, regPlusImm, "LOAD_I64">;
+defm : LoadPatImmOff<f32, load, regPlusImm, "LOAD_F32">;
+defm : LoadPatImmOff<f64, load, regPlusImm, "LOAD_F64">;
+defm : LoadPatImmOff<i32, load, or_is_add, "LOAD_I32">;
+defm : LoadPatImmOff<i64, load, or_is_add, "LOAD_I64">;
+defm : LoadPatImmOff<f32, load, or_is_add, "LOAD_F32">;
+defm : LoadPatImmOff<f64, load, or_is_add, "LOAD_F64">;
 
 // Select loads with just a constant offset.
-class LoadPatOffsetOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind imm:$off)), (inst 0, imm:$off, (CONST_I32 0))>;
+multiclass LoadPatOffsetOnly<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind imm:$off)),
+            (!cast<NI>(inst # "_A32") 0, imm:$off, (CONST_I32 0))>;
+  def : Pat<(ty (kind imm:$off)),
+            (!cast<NI>(inst # "_A64") 0, imm:$off, (CONST_I64 0))>;
+}
 
-def : LoadPatOffsetOnly<i32, load, LOAD_I32>;
-def : LoadPatOffsetOnly<i64, load, LOAD_I64>;
-def : LoadPatOffsetOnly<f32, load, LOAD_F32>;
-def : LoadPatOffsetOnly<f64, load, LOAD_F64>;
-
-class LoadPatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off))),
-      (inst 0, tglobaladdr:$off, (CONST_I32 0))>, Requires<[IsNotPIC]>;
-
-def : LoadPatGlobalAddrOffOnly<i32, load, LOAD_I32>;
-def : LoadPatGlobalAddrOffOnly<i64, load, LOAD_I64>;
-def : LoadPatGlobalAddrOffOnly<f32, load, LOAD_F32>;
-def : LoadPatGlobalAddrOffOnly<f64, load, LOAD_F64>;
+defm : LoadPatOffsetOnly<i32, load, "LOAD_I32">;
+defm : LoadPatOffsetOnly<i64, load, "LOAD_I64">;
+defm : LoadPatOffsetOnly<f32, load, "LOAD_F32">;
+defm : LoadPatOffsetOnly<f64, load, "LOAD_F64">;
+
+multiclass LoadPatGlobalAddrOffOnly<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off))),
+            (!cast<NI>(inst # "_A32") 0, tglobaladdr:$off, (CONST_I32 0))>,
+        Requires<[IsNotPIC]>;
+  def : Pat<(ty (kind (WebAssemblywrapper tglobaladdr:$off))),
+            (!cast<NI>(inst # "_A64") 0, tglobaladdr:$off, (CONST_I64 0))>,
+        Requires<[IsNotPIC]>;
+}
+
+defm : LoadPatGlobalAddrOffOnly<i32, load, "LOAD_I32">;
+defm : LoadPatGlobalAddrOffOnly<i64, load, "LOAD_I64">;
+defm : LoadPatGlobalAddrOffOnly<f32, load, "LOAD_F32">;
+defm : LoadPatGlobalAddrOffOnly<f64, load, "LOAD_F64">;
 
 // Extending load.
-defm LOAD8_S_I32 : WebAssemblyLoad<I32, "i32.load8_s", 0x2c>;
-defm LOAD8_U_I32 : WebAssemblyLoad<I32, "i32.load8_u", 0x2d>;
-defm LOAD16_S_I32 : WebAssemblyLoad<I32, "i32.load16_s", 0x2e>;
-defm LOAD16_U_I32 : WebAssemblyLoad<I32, "i32.load16_u", 0x2f>;
-defm LOAD8_S_I64 : WebAssemblyLoad<I64, "i64.load8_s", 0x30>;
-defm LOAD8_U_I64 : WebAssemblyLoad<I64, "i64.load8_u", 0x31>;
-defm LOAD16_S_I64 : WebAssemblyLoad<I64, "i64.load16_s", 0x32>;
-defm LOAD16_U_I64 : WebAssemblyLoad<I64, "i64.load16_u", 0x33>;
-defm LOAD32_S_I64 : WebAssemblyLoad<I64, "i64.load32_s", 0x34>;
-defm LOAD32_U_I64 : WebAssemblyLoad<I64, "i64.load32_u", 0x35>;
+defm LOAD8_S_I32 : WebAssemblyLoad<I32, "i32.load8_s", 0x2c, []>;
+defm LOAD8_U_I32 : WebAssemblyLoad<I32, "i32.load8_u", 0x2d, []>;
+defm LOAD16_S_I32 : WebAssemblyLoad<I32, "i32.load16_s", 0x2e, []>;
+defm LOAD16_U_I32 : WebAssemblyLoad<I32, "i32.load16_u", 0x2f, []>;
+defm LOAD8_S_I64 : WebAssemblyLoad<I64, "i64.load8_s", 0x30, []>;
+defm LOAD8_U_I64 : WebAssemblyLoad<I64, "i64.load8_u", 0x31, []>;
+defm LOAD16_S_I64 : WebAssemblyLoad<I64, "i64.load16_s", 0x32, []>;
+defm LOAD16_U_I64 : WebAssemblyLoad<I64, "i64.load16_u", 0x33, []>;
+defm LOAD32_S_I64 : WebAssemblyLoad<I64, "i64.load32_s", 0x34, []>;
+defm LOAD32_U_I64 : WebAssemblyLoad<I64, "i64.load32_u", 0x35, []>;
 
 // Select extending loads with no constant offset.
-def : LoadPatNoOffset<i32, sextloadi8, LOAD8_S_I32>;
-def : LoadPatNoOffset<i32, zextloadi8, LOAD8_U_I32>;
-def : LoadPatNoOffset<i32, sextloadi16, LOAD16_S_I32>;
-def : LoadPatNoOffset<i32, zextloadi16, LOAD16_U_I32>;
-def : LoadPatNoOffset<i64, sextloadi8, LOAD8_S_I64>;
-def : LoadPatNoOffset<i64, zextloadi8, LOAD8_U_I64>;
-def : LoadPatNoOffset<i64, sextloadi16, LOAD16_S_I64>;
-def : LoadPatNoOffset<i64, zextloadi16, LOAD16_U_I64>;
-def : LoadPatNoOffset<i64, sextloadi32, LOAD32_S_I64>;
-def : LoadPatNoOffset<i64, zextloadi32, LOAD32_U_I64>;
+defm : LoadPatNoOffset<i32, sextloadi8, "LOAD8_S_I32">;
+defm : LoadPatNoOffset<i32, zextloadi8, "LOAD8_U_I32">;
+defm : LoadPatNoOffset<i32, sextloadi16, "LOAD16_S_I32">;
+defm : LoadPatNoOffset<i32, zextloadi16, "LOAD16_U_I32">;
+defm : LoadPatNoOffset<i64, sextloadi8, "LOAD8_S_I64">;
+defm : LoadPatNoOffset<i64, zextloadi8, "LOAD8_U_I64">;
+defm : LoadPatNoOffset<i64, sextloadi16, "LOAD16_S_I64">;
+defm : LoadPatNoOffset<i64, zextloadi16, "LOAD16_U_I64">;
+defm : LoadPatNoOffset<i64, sextloadi32, "LOAD32_S_I64">;
+defm : LoadPatNoOffset<i64, zextloadi32, "LOAD32_U_I64">;
 
 // Select extending loads with a constant offset.
-def : LoadPatImmOff<i32, sextloadi8, regPlusImm, LOAD8_S_I32>;
-def : LoadPatImmOff<i32, zextloadi8, regPlusImm, LOAD8_U_I32>;
-def : LoadPatImmOff<i32, sextloadi16, regPlusImm, LOAD16_S_I32>;
-def : LoadPatImmOff<i32, zextloadi16, regPlusImm, LOAD16_U_I32>;
-def : LoadPatImmOff<i64, sextloadi8, regPlusImm, LOAD8_S_I64>;
-def : LoadPatImmOff<i64, zextloadi8, regPlusImm, LOAD8_U_I64>;
-def : LoadPatImmOff<i64, sextloadi16, regPlusImm, LOAD16_S_I64>;
-def : LoadPatImmOff<i64, zextloadi16, regPlusImm, LOAD16_U_I64>;
-def : LoadPatImmOff<i64, sextloadi32, regPlusImm, LOAD32_S_I64>;
-def : LoadPatImmOff<i64, zextloadi32, regPlusImm, LOAD32_U_I64>;
-
-def : LoadPatImmOff<i32, sextloadi8, or_is_add, LOAD8_S_I32>;
-def : LoadPatImmOff<i32, zextloadi8, or_is_add, LOAD8_U_I32>;
-def : LoadPatImmOff<i32, sextloadi16, or_is_add, LOAD16_S_I32>;
-def : LoadPatImmOff<i32, zextloadi16, or_is_add, LOAD16_U_I32>;
-def : LoadPatImmOff<i64, sextloadi8, or_is_add, LOAD8_S_I64>;
-def : LoadPatImmOff<i64, zextloadi8, or_is_add, LOAD8_U_I64>;
-def : LoadPatImmOff<i64, sextloadi16, or_is_add, LOAD16_S_I64>;
-def : LoadPatImmOff<i64, zextloadi16, or_is_add, LOAD16_U_I64>;
-def : LoadPatImmOff<i64, sextloadi32, or_is_add, LOAD32_S_I64>;
-def : LoadPatImmOff<i64, zextloadi32, or_is_add, LOAD32_U_I64>;
+defm : LoadPatImmOff<i32, sextloadi8, regPlusImm, "LOAD8_S_I32">;
+defm : LoadPatImmOff<i32, zextloadi8, regPlusImm, "LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, sextloadi16, regPlusImm, "LOAD16_S_I32">;
+defm : LoadPatImmOff<i32, zextloadi16, regPlusImm, "LOAD16_U_I32">;
+defm : LoadPatImmOff<i64, sextloadi8, regPlusImm, "LOAD8_S_I64">;
+defm : LoadPatImmOff<i64, zextloadi8, regPlusImm, "LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, sextloadi16, regPlusImm, "LOAD16_S_I64">;
+defm : LoadPatImmOff<i64, zextloadi16, regPlusImm, "LOAD16_U_I64">;
+defm : LoadPatImmOff<i64, sextloadi32, regPlusImm, "LOAD32_S_I64">;
+defm : LoadPatImmOff<i64, zextloadi32, regPlusImm, "LOAD32_U_I64">;
+
+defm : LoadPatImmOff<i32, sextloadi8, or_is_add, "LOAD8_S_I32">;
+defm : LoadPatImmOff<i32, zextloadi8, or_is_add, "LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, sextloadi16, or_is_add, "LOAD16_S_I32">;
+defm : LoadPatImmOff<i32, zextloadi16, or_is_add, "LOAD16_U_I32">;
+defm : LoadPatImmOff<i64, sextloadi8, or_is_add, "LOAD8_S_I64">;
+defm : LoadPatImmOff<i64, zextloadi8, or_is_add, "LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, sextloadi16, or_is_add, "LOAD16_S_I64">;
+defm : LoadPatImmOff<i64, zextloadi16, or_is_add, "LOAD16_U_I64">;
+defm : LoadPatImmOff<i64, sextloadi32, or_is_add, "LOAD32_S_I64">;
+defm : LoadPatImmOff<i64, zextloadi32, or_is_add, "LOAD32_U_I64">;
 
 // Select extending loads with just a constant offset.
-def : LoadPatOffsetOnly<i32, sextloadi8, LOAD8_S_I32>;
-def : LoadPatOffsetOnly<i32, zextloadi8, LOAD8_U_I32>;
-def : LoadPatOffsetOnly<i32, sextloadi16, LOAD16_S_I32>;
-def : LoadPatOffsetOnly<i32, zextloadi16, LOAD16_U_I32>;
-
-def : LoadPatOffsetOnly<i64, sextloadi8, LOAD8_S_I64>;
-def : LoadPatOffsetOnly<i64, zextloadi8, LOAD8_U_I64>;
-def : LoadPatOffsetOnly<i64, sextloadi16, LOAD16_S_I64>;
-def : LoadPatOffsetOnly<i64, zextloadi16, LOAD16_U_I64>;
-def : LoadPatOffsetOnly<i64, sextloadi32, LOAD32_S_I64>;
-def : LoadPatOffsetOnly<i64, zextloadi32, LOAD32_U_I64>;
-
-def : LoadPatGlobalAddrOffOnly<i32, sextloadi8, LOAD8_S_I32>;
-def : LoadPatGlobalAddrOffOnly<i32, zextloadi8, LOAD8_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i32, sextloadi16, LOAD16_S_I32>;
-def : LoadPatGlobalAddrOffOnly<i32, zextloadi16, LOAD16_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i64, sextloadi8, LOAD8_S_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, zextloadi8, LOAD8_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, sextloadi16, LOAD16_S_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, zextloadi16, LOAD16_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, sextloadi32, LOAD32_S_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, zextloadi32, LOAD32_U_I64>;
+defm : LoadPatOffsetOnly<i32, sextloadi8, "LOAD8_S_I32">;
+defm : LoadPatOffsetOnly<i32, zextloadi8, "LOAD8_U_I32">;
+defm : LoadPatOffsetOnly<i32, sextloadi16, "LOAD16_S_I32">;
+defm : LoadPatOffsetOnly<i32, zextloadi16, "LOAD16_U_I32">;
+
+defm : LoadPatOffsetOnly<i64, sextloadi8, "LOAD8_S_I64">;
+defm : LoadPatOffsetOnly<i64, zextloadi8, "LOAD8_U_I64">;
+defm : LoadPatOffsetOnly<i64, sextloadi16, "LOAD16_S_I64">;
+defm : LoadPatOffsetOnly<i64, zextloadi16, "LOAD16_U_I64">;
+defm : LoadPatOffsetOnly<i64, sextloadi32, "LOAD32_S_I64">;
+defm : LoadPatOffsetOnly<i64, zextloadi32, "LOAD32_U_I64">;
+
+defm : LoadPatGlobalAddrOffOnly<i32, sextloadi8, "LOAD8_S_I32">;
+defm : LoadPatGlobalAddrOffOnly<i32, zextloadi8, "LOAD8_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i32, sextloadi16, "LOAD16_S_I32">;
+defm : LoadPatGlobalAddrOffOnly<i32, zextloadi16, "LOAD16_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i64, sextloadi8, "LOAD8_S_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, zextloadi8, "LOAD8_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, sextloadi16, "LOAD16_S_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, zextloadi16, "LOAD16_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, sextloadi32, "LOAD32_S_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, zextloadi32, "LOAD32_U_I64">;
 
 // Resolve "don't care" extending loads to zero-extending loads. This is
 // somewhat arbitrary, but zero-extending is conceptually simpler.
 
 // Select "don't care" extending loads with no constant offset.
-def : LoadPatNoOffset<i32, extloadi8, LOAD8_U_I32>;
-def : LoadPatNoOffset<i32, extloadi16, LOAD16_U_I32>;
-def : LoadPatNoOffset<i64, extloadi8, LOAD8_U_I64>;
-def : LoadPatNoOffset<i64, extloadi16, LOAD16_U_I64>;
-def : LoadPatNoOffset<i64, extloadi32, LOAD32_U_I64>;
+defm : LoadPatNoOffset<i32, extloadi8, "LOAD8_U_I32">;
+defm : LoadPatNoOffset<i32, extloadi16, "LOAD16_U_I32">;
+defm : LoadPatNoOffset<i64, extloadi8, "LOAD8_U_I64">;
+defm : LoadPatNoOffset<i64, extloadi16, "LOAD16_U_I64">;
+defm : LoadPatNoOffset<i64, extloadi32, "LOAD32_U_I64">;
 
 // Select "don't care" extending loads with a constant offset.
-def : LoadPatImmOff<i32, extloadi8, regPlusImm, LOAD8_U_I32>;
-def : LoadPatImmOff<i32, extloadi16, regPlusImm, LOAD16_U_I32>;
-def : LoadPatImmOff<i64, extloadi8, regPlusImm, LOAD8_U_I64>;
-def : LoadPatImmOff<i64, extloadi16, regPlusImm, LOAD16_U_I64>;
-def : LoadPatImmOff<i64, extloadi32, regPlusImm, LOAD32_U_I64>;
-def : LoadPatImmOff<i32, extloadi8, or_is_add, LOAD8_U_I32>;
-def : LoadPatImmOff<i32, extloadi16, or_is_add, LOAD16_U_I32>;
-def : LoadPatImmOff<i64, extloadi8, or_is_add, LOAD8_U_I64>;
-def : LoadPatImmOff<i64, extloadi16, or_is_add, LOAD16_U_I64>;
-def : LoadPatImmOff<i64, extloadi32, or_is_add, LOAD32_U_I64>;
+defm : LoadPatImmOff<i32, extloadi8, regPlusImm, "LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, extloadi16, regPlusImm, "LOAD16_U_I32">;
+defm : LoadPatImmOff<i64, extloadi8, regPlusImm, "LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, extloadi16, regPlusImm, "LOAD16_U_I64">;
+defm : LoadPatImmOff<i64, extloadi32, regPlusImm, "LOAD32_U_I64">;
+defm : LoadPatImmOff<i32, extloadi8, or_is_add, "LOAD8_U_I32">;
+defm : LoadPatImmOff<i32, extloadi16, or_is_add, "LOAD16_U_I32">;
+defm : LoadPatImmOff<i64, extloadi8, or_is_add, "LOAD8_U_I64">;
+defm : LoadPatImmOff<i64, extloadi16, or_is_add, "LOAD16_U_I64">;
+defm : LoadPatImmOff<i64, extloadi32, or_is_add, "LOAD32_U_I64">;
 
 // Select "don't care" extending loads with just a constant offset.
-def : LoadPatOffsetOnly<i32, extloadi8, LOAD8_U_I32>;
-def : LoadPatOffsetOnly<i32, extloadi16, LOAD16_U_I32>;
-def : LoadPatOffsetOnly<i64, extloadi8, LOAD8_U_I64>;
-def : LoadPatOffsetOnly<i64, extloadi16, LOAD16_U_I64>;
-def : LoadPatOffsetOnly<i64, extloadi32, LOAD32_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i32, extloadi8, LOAD8_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i32, extloadi16, LOAD16_U_I32>;
-def : LoadPatGlobalAddrOffOnly<i64, extloadi8, LOAD8_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, extloadi16, LOAD16_U_I64>;
-def : LoadPatGlobalAddrOffOnly<i64, extloadi32, LOAD32_U_I64>;
+defm : LoadPatOffsetOnly<i32, extloadi8, "LOAD8_U_I32">;
+defm : LoadPatOffsetOnly<i32, extloadi16, "LOAD16_U_I32">;
+defm : LoadPatOffsetOnly<i64, extloadi8, "LOAD8_U_I64">;
+defm : LoadPatOffsetOnly<i64, extloadi16, "LOAD16_U_I64">;
+defm : LoadPatOffsetOnly<i64, extloadi32, "LOAD32_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i32, extloadi8, "LOAD8_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i32, extloadi16, "LOAD16_U_I32">;
+defm : LoadPatGlobalAddrOffOnly<i64, extloadi8, "LOAD8_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, extloadi16, "LOAD16_U_I64">;
+defm : LoadPatGlobalAddrOffOnly<i64, extloadi32, "LOAD32_U_I64">;
 
 // Defines atomic and non-atomic stores, regular and truncating
 multiclass WebAssemblyStore<WebAssemblyRegClass rc, string Name, int Opcode> {
   let mayStore = 1, UseNamedOperandTable = 1 in
-  defm "" : I<(outs),
+  defm "_A32" : I<(outs),
                   (ins P2Align:$p2align, offset32_op:$off, I32:$addr, rc:$val),
                   (outs),
                   (ins P2Align:$p2align, offset32_op:$off), [],
                   !strconcat(Name, "\t${off}(${addr})${p2align}, $val"),
                   !strconcat(Name, "\t${off}${p2align}"), Opcode>;
+  let mayStore = 1, UseNamedOperandTable = 1 in
+  defm "_A64" : I<(outs),
+                  (ins P2Align:$p2align, offset64_op:$off, I64:$addr, rc:$val),
+                  (outs),
+                  (ins P2Align:$p2align, offset64_op:$off), [],
+                  !strconcat(Name, "\t${off}(${addr})${p2align}, $val"),
+                  !strconcat(Name, "\t${off}${p2align}"), Opcode>;
 }
+
 // Basic store.
 // Note: WebAssembly inverts SelectionDAG's usual operand order.
 defm STORE_I32  : WebAssemblyStore<I32, "i32.store", 0x36>;
 defm STORE_I64  : WebAssemblyStore<I64, "i64.store", 0x37>;
 defm STORE_F32  : WebAssemblyStore<F32, "f32.store", 0x38>;
 defm STORE_F64  : WebAssemblyStore<F64, "f64.store", 0x39>;
 
 // Select stores with no constant offset.
-class StorePatNoOffset<ValueType ty, PatFrag node, NI inst> :
-  Pat<(node ty:$val, I32:$addr), (inst 0, 0, I32:$addr, ty:$val)>;
+multiclass StorePatNoOffset<ValueType ty, PatFrag node, string inst> {
+  def : Pat<(node ty:$val, I32:$addr),
+            (!cast<NI>(inst # "_A32") 0, 0, I32:$addr, ty:$val)>;
+  def : Pat<(node ty:$val, I64:$addr),
+            (!cast<NI>(inst # "_A64") 0, 0, I64:$addr, ty:$val)>;
+}
 
-def : StorePatNoOffset<i32, store, STORE_I32>;
-def : StorePatNoOffset<i64, store, STORE_I64>;
-def : StorePatNoOffset<f32, store, STORE_F32>;
-def : StorePatNoOffset<f64, store, STORE_F64>;
+defm : StorePatNoOffset<i32, store, "STORE_I32">;
+defm : StorePatNoOffset<i64, store, "STORE_I64">;
+defm : StorePatNoOffset<f32, store, "STORE_F32">;
+defm : StorePatNoOffset<f64, store, "STORE_F64">;
 
 // Select stores with a constant offset.
-class StorePatImmOff<ValueType ty, PatFrag kind, PatFrag operand, NI inst> :
-  Pat<(kind ty:$val, (operand I32:$addr, imm:$off)),
-      (inst 0, imm:$off, I32:$addr, ty:$val)>;
-
-def : StorePatImmOff<i32, store, regPlusImm, STORE_I32>;
-def : StorePatImmOff<i64, store, regPlusImm, STORE_I64>;
-def : StorePatImmOff<f32, store, regPlusImm, STORE_F32>;
-def : StorePatImmOff<f64, store, regPlusImm, STORE_F64>;
-def : StorePatImmOff<i32, store, or_is_add, STORE_I32>;
-def : StorePatImmOff<i64, store, or_is_add, STORE_I64>;
-def : StorePatImmOff<f32, store, or_is_add, STORE_F32>;
-def : StorePatImmOff<f64, store, or_is_add, STORE_F64>;
+multiclass StorePatImmOff<ValueType ty, PatFrag kind, PatFrag operand,
+                          string inst> {
+  def : Pat<(kind ty:$val, (operand I32:$addr, imm:$off)),
+            (!cast<NI>(inst # "_A32") 0, imm:$off, I32:$addr, ty:$val)>;
+  def : Pat<(kind ty:$val, (operand I64:$addr, imm:$off)),
+            (!cast<NI>(inst # "_A64") 0, imm:$off, I64:$addr, ty:$val)>;
+}
+
+defm : StorePatImmOff<i32, store, regPlusImm, "STORE_I32">;
+defm : StorePatImmOff<i64, store, regPlusImm, "STORE_I64">;
+defm : StorePatImmOff<f32, store, regPlusImm, "STORE_F32">;
+defm : StorePatImmOff<f64, store, regPlusImm, "STORE_F64">;
+defm : StorePatImmOff<i32, store, or_is_add, "STORE_I32">;
+defm : StorePatImmOff<i64, store, or_is_add, "STORE_I64">;
+defm : StorePatImmOff<f32, store, or_is_add, "STORE_F32">;
+defm : StorePatImmOff<f64, store, or_is_add, "STORE_F64">;
 
 // Select stores with just a constant offset.
-class StorePatOffsetOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(kind ty:$val, imm:$off), (inst 0, imm:$off, (CONST_I32 0), ty:$val)>;
-def : StorePatOffsetOnly<i32, store, STORE_I32>;
-def : StorePatOffsetOnly<i64, store, STORE_I64>;
-def : StorePatOffsetOnly<f32, store, STORE_F32>;
-def : StorePatOffsetOnly<f64, store, STORE_F64>;
-
-class StorePatGlobalAddrOffOnly<ValueType ty, PatFrag kind, NI inst> :
-  Pat<(kind ty:$val, (WebAssemblywrapper tglobaladdr:$off)),
-      (inst 0, tglobaladdr:$off, (CONST_I32 0), ty:$val)>, Requires<[IsNotPIC]>;
-def : StorePatGlobalAddrOffOnly<i32, store, STORE_I32>;
-def : StorePatGlobalAddrOffOnly<i64, store, STORE_I64>;
-def : StorePatGlobalAddrOffOnly<f32, store, STORE_F32>;
-def : StorePatGlobalAddrOffOnly<f64, store, STORE_F64>;
+multiclass StorePatOffsetOnly<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(kind ty:$val, imm:$off),
+            (!cast<NI>(inst # "_A32") 0, imm:$off, (CONST_I32 0), ty:$val)>;
+  def : Pat<(kind ty:$val, imm:$off),
+            (!cast<NI>(inst # "_A64") 0, imm:$off, (CONST_I64 0), ty:$val)>;
+}
+defm : StorePatOffsetOnly<i32, store, "STORE_I32">;
+defm : StorePatOffsetOnly<i64, store, "STORE_I64">;
+defm : StorePatOffsetOnly<f32, store, "STORE_F32">;
+defm : StorePatOffsetOnly<f64, store, "STORE_F64">;
+
+multiclass StorePatGlobalAddrOffOnly<ValueType ty, PatFrag kind, string inst> {
+  def : Pat<(kind ty:$val, (WebAssemblywrapper tglobaladdr:$off)),
+            (!cast<NI>(inst # "_A32") 0, tglobaladdr:$off, (CONST_I32 0),
+             ty:$val)>,
+        Requires<[IsNotPIC]>;
+  def : Pat<(kind ty:$val, (WebAssemblywrapper tglobaladdr:$off)),
+            (!cast<NI>(inst # "_A64") 0, tglobaladdr:$off, (CONST_I64 0),
+             ty:$val)>,
+        Requires<[IsNotPIC]>;
+}
+defm : StorePatGlobalAddrOffOnly<i32, store, "STORE_I32">;
+defm : StorePatGlobalAddrOffOnly<i64, store, "STORE_I64">;
+defm : StorePatGlobalAddrOffOnly<f32, store, "STORE_F32">;
+defm : StorePatGlobalAddrOffOnly<f64, store, "STORE_F64">;
 
 // Truncating store.
 defm STORE8_I32 : WebAssemblyStore<I32, "i32.store8", 0x3a>;
 defm STORE16_I32 : WebAssemblyStore<I32, "i32.store16", 0x3b>;
 defm STORE8_I64 : WebAssemblyStore<I64, "i64.store8", 0x3c>;
 defm STORE16_I64 : WebAssemblyStore<I64, "i64.store16", 0x3d>;
 defm STORE32_I64 : WebAssemblyStore<I64, "i64.store32", 0x3e>;
 
 // Select truncating stores with no constant offset.
-def : StorePatNoOffset<i32, truncstorei8, STORE8_I32>;
-def : StorePatNoOffset<i32, truncstorei16, STORE16_I32>;
-def : StorePatNoOffset<i64, truncstorei8, STORE8_I64>;
-def : StorePatNoOffset<i64, truncstorei16, STORE16_I64>;
-def : StorePatNoOffset<i64, truncstorei32, STORE32_I64>;
+defm : StorePatNoOffset<i32, truncstorei8, "STORE8_I32">;
+defm : StorePatNoOffset<i32, truncstorei16, "STORE16_I32">;
+defm : StorePatNoOffset<i64, truncstorei8, "STORE8_I64">;
+defm : StorePatNoOffset<i64, truncstorei16, "STORE16_I64">;
+defm : StorePatNoOffset<i64, truncstorei32, "STORE32_I64">;
 
 // Select truncating stores with a constant offset.
-def : StorePatImmOff<i32, truncstorei8, regPlusImm, STORE8_I32>;
-def : StorePatImmOff<i32, truncstorei16, regPlusImm, STORE16_I32>;
-def : StorePatImmOff<i64, truncstorei8, regPlusImm, STORE8_I64>;
-def : StorePatImmOff<i64, truncstorei16, regPlusImm, STORE16_I64>;
-def : StorePatImmOff<i64, truncstorei32, regPlusImm, STORE32_I64>;
-def : StorePatImmOff<i32, truncstorei8, or_is_add, STORE8_I32>;
-def : StorePatImmOff<i32, truncstorei16, or_is_add, STORE16_I32>;
-def : StorePatImmOff<i64, truncstorei8, or_is_add, STORE8_I64>;
-def : StorePatImmOff<i64, truncstorei16, or_is_add, STORE16_I64>;
-def : StorePatImmOff<i64, truncstorei32, or_is_add, STORE32_I64>;
+defm : StorePatImmOff<i32, truncstorei8, regPlusImm, "STORE8_I32">;
+defm : StorePatImmOff<i32, truncstorei16, regPlusImm, "STORE16_I32">;
+defm : StorePatImmOff<i64, truncstorei8, regPlusImm, "STORE8_I64">;
+defm : StorePatImmOff<i64, truncstorei16, regPlusImm, "STORE16_I64">;
+defm : StorePatImmOff<i64, truncstorei32, regPlusImm, "STORE32_I64">;
+defm : StorePatImmOff<i32, truncstorei8, or_is_add, "STORE8_I32">;
+defm : StorePatImmOff<i32, truncstorei16, or_is_add, "STORE16_I32">;
+defm : StorePatImmOff<i64, truncstorei8, or_is_add, "STORE8_I64">;
+defm : StorePatImmOff<i64, truncstorei16, or_is_add, "STORE16_I64">;
+defm : StorePatImmOff<i64, truncstorei32, or_is_add, "STORE32_I64">;
 
 // Select truncating stores with just a constant offset.
-def : StorePatOffsetOnly<i32, truncstorei8, STORE8_I32>;
-def : StorePatOffsetOnly<i32, truncstorei16, STORE16_I32>;
-def : StorePatOffsetOnly<i64, truncstorei8, STORE8_I64>;
-def : StorePatOffsetOnly<i64, truncstorei16, STORE16_I64>;
-def : StorePatOffsetOnly<i64, truncstorei32, STORE32_I64>;
-def : StorePatGlobalAddrOffOnly<i32, truncstorei8, STORE8_I32>;
-def : StorePatGlobalAddrOffOnly<i32, truncstorei16, STORE16_I32>;
-def : StorePatGlobalAddrOffOnly<i64, truncstorei8, STORE8_I64>;
-def : StorePatGlobalAddrOffOnly<i64, truncstorei16, STORE16_I64>;
-def : StorePatGlobalAddrOffOnly<i64, truncstorei32, STORE32_I64>;
+defm : StorePatOffsetOnly<i32, truncstorei8, "STORE8_I32">;
+defm : StorePatOffsetOnly<i32, truncstorei16, "STORE16_I32">;
+defm : StorePatOffsetOnly<i64, truncstorei8, "STORE8_I64">;
+defm : StorePatOffsetOnly<i64, truncstorei16, "STORE16_I64">;
+defm : StorePatOffsetOnly<i64, truncstorei32, "STORE32_I64">;
+defm : StorePatGlobalAddrOffOnly<i32, truncstorei8, "STORE8_I32">;
+defm : StorePatGlobalAddrOffOnly<i32, truncstorei16, "STORE16_I32">;
+defm : StorePatGlobalAddrOffOnly<i64, truncstorei8, "STORE8_I64">;
+defm : StorePatGlobalAddrOffOnly<i64, truncstorei16, "STORE16_I64">;
+defm : StorePatGlobalAddrOffOnly<i64, truncstorei32, "STORE32_I64">;
 
 // Current memory size.
 defm MEMORY_SIZE_I32 : I<(outs I32:$dst), (ins i32imm:$flags),
                          (outs), (ins i32imm:$flags),
                          [(set I32:$dst,
                            (int_wasm_memory_size (i32 imm:$flags)))],
                          "memory.size\t$dst, $flags", "memory.size\t$flags",
                          0x3f>,
                        Requires<[HasAddr32]>;
 
 // Grow memory.
 defm MEMORY_GROW_I32 : I<(outs I32:$dst), (ins i32imm:$flags, I32:$delta),
                          (outs), (ins i32imm:$flags),
                          [(set I32:$dst,
                            (int_wasm_memory_grow (i32 imm:$flags),
                              I32:$delta))],
                          "memory.grow\t$dst, $flags, $delta",
                          "memory.grow\t$flags", 0x40>,
                        Requires<[HasAddr32]>;

llvm/lib/Target/WebAssembly/WebAssemblyInstrSIMD.td

 foreach SIZE = [2, 4, 8, 16, 32] in
 def LaneIdx#SIZE : ImmLeaf<i32, "return 0 <= Imm && Imm < "#SIZE#";">;
 
 //===----------------------------------------------------------------------===//
 // Load and store
 //===----------------------------------------------------------------------===//
 
 // Load: v128.load
-let mayLoad = 1, UseNamedOperandTable = 1 in
-defm LOAD_V128 :
+let mayLoad = 1, UseNamedOperandTable = 1 in {
+defm LOAD_V128_A32 :
   SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset32_op:$off, I32:$addr),
          (outs), (ins P2Align:$p2align, offset32_op:$off), [],
          "v128.load\t$dst, ${off}(${addr})$p2align",
          "v128.load\t$off$p2align", 0>;
+defm LOAD_V128_A64 :
+  SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset64_op:$off, I64:$addr),
+         (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+         "v128.load\t$dst, ${off}(${addr})$p2align",
+         "v128.load\t$off$p2align", 0>;
+}
 
 // Def load and store patterns from WebAssemblyInstrMemory.td for vector types
 foreach vec_t = [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64] in {
-def : LoadPatNoOffset<vec_t, load, LOAD_V128>;
-def : LoadPatImmOff<vec_t, load, regPlusImm, LOAD_V128>;
-def : LoadPatImmOff<vec_t, load, or_is_add, LOAD_V128>;
-def : LoadPatOffsetOnly<vec_t, load, LOAD_V128>;
-def : LoadPatGlobalAddrOffOnly<vec_t, load, LOAD_V128>;
+defm : LoadPatNoOffset<vec_t, load, "LOAD_V128">;
+defm : LoadPatImmOff<vec_t, load, regPlusImm, "LOAD_V128">;
+defm : LoadPatImmOff<vec_t, load, or_is_add, "LOAD_V128">;
+defm : LoadPatOffsetOnly<vec_t, load, "LOAD_V128">;
+defm : LoadPatGlobalAddrOffOnly<vec_t, load, "LOAD_V128">;
 }
 
 // vNxM.load_splat
 multiclass SIMDLoadSplat<string vec, bits<32> simdop> {
-  let mayLoad = 1, UseNamedOperandTable = 1 in
-  defm LOAD_SPLAT_#vec :
+  let mayLoad = 1, UseNamedOperandTable = 1 in {
+  defm LOAD_SPLAT_#vec#_A32 :
     SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset32_op:$off, I32:$addr),
            (outs), (ins P2Align:$p2align, offset32_op:$off), [],
            vec#".load_splat\t$dst, ${off}(${addr})$p2align",
            vec#".load_splat\t$off$p2align", simdop>;
+  defm LOAD_SPLAT_#vec#_A64 :
+    SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset64_op:$off, I64:$addr),
+           (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+           vec#".load_splat\t$dst, ${off}(${addr})$p2align",
+           vec#".load_splat\t$off$p2align", simdop>;
+  }
 }
 
 defm "" : SIMDLoadSplat<"v8x16", 7>;
 defm "" : SIMDLoadSplat<"v16x8", 8>;
 defm "" : SIMDLoadSplat<"v32x4", 9>;
 defm "" : SIMDLoadSplat<"v64x2", 10>;
 
 def wasm_load_splat_t : SDTypeProfile<1, 1, [SDTCisPtrTy<1>]>;
 def wasm_load_splat : SDNode<"WebAssemblyISD::LOAD_SPLAT", wasm_load_splat_t,
                              [SDNPHasChain, SDNPMayLoad, SDNPMemOperand]>;
 def load_splat : PatFrag<(ops node:$addr), (wasm_load_splat node:$addr)>;
 
 foreach args = [["v16i8", "v8x16"], ["v8i16", "v16x8"], ["v4i32", "v32x4"],
                 ["v2i64", "v64x2"], ["v4f32", "v32x4"], ["v2f64", "v64x2"]] in {
-def : LoadPatNoOffset<!cast<ValueType>(args[0]),
+defm : LoadPatNoOffset<!cast<ValueType>(args[0]),
                        load_splat,
-                      !cast<NI>("LOAD_SPLAT_"#args[1])>;
-def : LoadPatImmOff<!cast<ValueType>(args[0]),
+                       "LOAD_SPLAT_"#args[1]>;
+defm : LoadPatImmOff<!cast<ValueType>(args[0]),
                      load_splat,
                      regPlusImm,
-                    !cast<NI>("LOAD_SPLAT_"#args[1])>;
-def : LoadPatImmOff<!cast<ValueType>(args[0]),
+                     "LOAD_SPLAT_"#args[1]>;
+defm : LoadPatImmOff<!cast<ValueType>(args[0]),
                      load_splat,
                      or_is_add,
-                    !cast<NI>("LOAD_SPLAT_"#args[1])>;
-def : LoadPatOffsetOnly<!cast<ValueType>(args[0]),
+                     "LOAD_SPLAT_"#args[1]>;
+defm : LoadPatOffsetOnly<!cast<ValueType>(args[0]),
                          load_splat,
-                        !cast<NI>("LOAD_SPLAT_"#args[1])>;
-def : LoadPatGlobalAddrOffOnly<!cast<ValueType>(args[0]),
+                         "LOAD_SPLAT_"#args[1]>;
+defm : LoadPatGlobalAddrOffOnly<!cast<ValueType>(args[0]),
                                 load_splat,
-                               !cast<NI>("LOAD_SPLAT_"#args[1])>;
+                                "LOAD_SPLAT_"#args[1]>;
 }
 
 // Load and extend
 multiclass SIMDLoadExtend<ValueType vec_t, string name, bits<32> simdop> {
   let mayLoad = 1, UseNamedOperandTable = 1 in {
-  defm LOAD_EXTEND_S_#vec_t :
+  defm LOAD_EXTEND_S_#vec_t#_A32 :
     SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset32_op:$off, I32:$addr),
            (outs), (ins P2Align:$p2align, offset32_op:$off), [],
            name#"_s\t$dst, ${off}(${addr})$p2align",
            name#"_s\t$off$p2align", simdop>;
-  defm LOAD_EXTEND_U_#vec_t :
+  defm LOAD_EXTEND_U_#vec_t#_A32 :
     SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset32_op:$off, I32:$addr),
            (outs), (ins P2Align:$p2align, offset32_op:$off), [],
            name#"_u\t$dst, ${off}(${addr})$p2align",
            name#"_u\t$off$p2align", !add(simdop, 1)>;
+  defm LOAD_EXTEND_S_#vec_t#_A64 :
+    SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset64_op:$off, I64:$addr),
+           (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+           name#"_s\t$dst, ${off}(${addr})$p2align",
+           name#"_s\t$off$p2align", simdop>;
+  defm LOAD_EXTEND_U_#vec_t#_A64 :
+    SIMD_I<(outs V128:$dst), (ins P2Align:$p2align, offset64_op:$off, I64:$addr),
+           (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+           name#"_u\t$dst, ${off}(${addr})$p2align",
+           name#"_u\t$off$p2align", !add(simdop, 1)>;
   }
 }
 
 defm "" : SIMDLoadExtend<v8i16, "i16x8.load8x8", 1>;
 defm "" : SIMDLoadExtend<v4i32, "i32x4.load16x4", 3>;
 defm "" : SIMDLoadExtend<v2i64, "i64x2.load32x2", 5>;
 
 foreach types = [[v8i16, i8], [v4i32, i16], [v2i64, i32]] in
 foreach exts = [["sextloadv", "_S"],
                 ["zextloadv", "_U"],
                 ["extloadv", "_U"]] in {
-def : LoadPatNoOffset<types[0], !cast<PatFrag>(exts[0]#types[1]),
-                      !cast<NI>("LOAD_EXTEND"#exts[1]#"_"#types[0])>;
-def : LoadPatImmOff<types[0], !cast<PatFrag>(exts[0]#types[1]), regPlusImm,
-                    !cast<NI>("LOAD_EXTEND"#exts[1]#"_"#types[0])>;
-def : LoadPatImmOff<types[0], !cast<PatFrag>(exts[0]#types[1]), or_is_add,
-                    !cast<NI>("LOAD_EXTEND"#exts[1]#"_"#types[0])>;
-def : LoadPatOffsetOnly<types[0], !cast<PatFrag>(exts[0]#types[1]),
-                        !cast<NI>("LOAD_EXTEND"#exts[1]#"_"#types[0])>;
-def : LoadPatGlobalAddrOffOnly<types[0], !cast<PatFrag>(exts[0]#types[1]),
-                               !cast<NI>("LOAD_EXTEND"#exts[1]#"_"#types[0])>;
+defm : LoadPatNoOffset<types[0], !cast<PatFrag>(exts[0]#types[1]),
+                       "LOAD_EXTEND"#exts[1]#"_"#types[0]>;
+defm : LoadPatImmOff<types[0], !cast<PatFrag>(exts[0]#types[1]), regPlusImm,
+                     "LOAD_EXTEND"#exts[1]#"_"#types[0]>;
+defm : LoadPatImmOff<types[0], !cast<PatFrag>(exts[0]#types[1]), or_is_add,
+                     "LOAD_EXTEND"#exts[1]#"_"#types[0]>;
+defm : LoadPatOffsetOnly<types[0], !cast<PatFrag>(exts[0]#types[1]),
+                         "LOAD_EXTEND"#exts[1]#"_"#types[0]>;
+defm : LoadPatGlobalAddrOffOnly<types[0], !cast<PatFrag>(exts[0]#types[1]),
+                                "LOAD_EXTEND"#exts[1]#"_"#types[0]>;
 }
 
 
 // Store: v128.store
-let mayStore = 1, UseNamedOperandTable = 1 in
-defm STORE_V128 :
+let mayStore = 1, UseNamedOperandTable = 1 in {
+defm STORE_V128_A32 :
   SIMD_I<(outs), (ins P2Align:$p2align, offset32_op:$off, I32:$addr, V128:$vec),
          (outs), (ins P2Align:$p2align, offset32_op:$off), [],
          "v128.store\t${off}(${addr})$p2align, $vec",
          "v128.store\t$off$p2align", 11>;
-
+defm STORE_V128_A64 :
+  SIMD_I<(outs), (ins P2Align:$p2align, offset64_op:$off, I64:$addr, V128:$vec),
+         (outs), (ins P2Align:$p2align, offset64_op:$off), [],
+         "v128.store\t${off}(${addr})$p2align, $vec",
+         "v128.store\t$off$p2align", 11>;
+}
 foreach vec_t = [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64] in {
 // Def load and store patterns from WebAssemblyInstrMemory.td for vector types
-def : StorePatNoOffset<vec_t, store, STORE_V128>;
-def : StorePatImmOff<vec_t, store, regPlusImm, STORE_V128>;
-def : StorePatImmOff<vec_t, store, or_is_add, STORE_V128>;
-def : StorePatOffsetOnly<vec_t, store, STORE_V128>;
-def : StorePatGlobalAddrOffOnly<vec_t, store, STORE_V128>;
+defm : StorePatNoOffset<vec_t, store, "STORE_V128">;
+defm : StorePatImmOff<vec_t, store, regPlusImm, "STORE_V128">;
+defm : StorePatImmOff<vec_t, store, or_is_add, "STORE_V128">;
+defm : StorePatOffsetOnly<vec_t, store, "STORE_V128">;
+defm : StorePatGlobalAddrOffOnly<vec_t, store, "STORE_V128">;
 }
 
 //===----------------------------------------------------------------------===//
 // Constructing SIMD values
 //===----------------------------------------------------------------------===//
 
 // Constant: v128.const
 multiclass ConstVec<ValueType vec_t, dag ops, dag pat, string args> {

llvm/test/CodeGen/WebAssembly/atomic-fence.mir

 ---
 # CHECK-LABEL: name: compiler_fence_test
 name: compiler_fence_test
 liveins:
   - { reg: '$arguments' }
 tracksRegLiveness: true
 body: |
   bb.0:
-    ; CHECK: %[[REG:[0-9]+]]:i32 = ATOMIC_NOTIFY
+    ; CHECK: %[[REG:[0-9]+]]:i32 = ATOMIC_NOTIFY_A32
     ; CHECK: LOCAL_SET_I32 [[LOCAL:[0-9]+]], %[[REG]]
     ; CHECK: COMPILER_FENCE
     ; CHECK: ADD_I32
     ; CHECK: LOCAL_GET_I32 [[LOCAL]]
     ; CHECK: CALL @foo
 
     liveins: $arguments
     %0:i32 = CONST_I32 0, implicit-def $arguments
-    %1:i32 = ATOMIC_NOTIFY 2, 0, %0:i32, %0:i32, implicit-def $arguments
+    %1:i32 = ATOMIC_NOTIFY_A32 2, 0, %0:i32, %0:i32, implicit-def $arguments
     COMPILER_FENCE implicit-def $arguments
     %2:i32 = ADD_I32 %0:i32, %0:i32, implicit-def $arguments
     CALL @foo, %2:i32, %1:i32, implicit-def $arguments
     RETURN implicit-def $arguments
 ...
 
 ---
 # CHECK-LABEL: name: atomic_fence_test
 name: atomic_fence_test
 liveins:
   - { reg: '$arguments' }
 tracksRegLiveness: true
 body: |
   bb.0:
-    ; CHECK: %[[REG:[0-9]+]]:i32 = ATOMIC_NOTIFY
+    ; CHECK: %[[REG:[0-9]+]]:i32 = ATOMIC_NOTIFY_A32
     ; CHECK: LOCAL_SET_I32 [[LOCAL:[0-9]+]], %[[REG]]
     ; CHECK: ATOMIC_FENCE
     ; CHECK: ADD_I32
     ; CHECK: LOCAL_GET_I32 [[LOCAL]]
     ; CHECK: CALL @foo
 
     liveins: $arguments
     %0:i32 = CONST_I32 0, implicit-def $arguments
-    %1:i32 = ATOMIC_NOTIFY 2, 0, %0:i32, %0:i32, implicit-def $arguments
+    %1:i32 = ATOMIC_NOTIFY_A32 2, 0, %0:i32, %0:i32, implicit-def $arguments
     ATOMIC_FENCE 0, implicit-def $arguments
     %2:i32 = ADD_I32 %0:i32, %0:i32, implicit-def $arguments
     CALL @foo, %2:i32, %1:i32, implicit-def $arguments
     RETURN implicit-def $arguments
 ...

llvm/test/CodeGen/WebAssembly/cpus.ll

 ; This tests that llc accepts all valid WebAssembly CPUs.
 
 ; RUN: llc < %s -asm-verbose=false -mtriple=wasm32-unknown-unknown -mcpu=mvp 2>&1 | FileCheck %s
-; RUN: not --crash llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=mvp 2>&1 | FileCheck %s --check-prefix=WASM64
+; RUN: llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=mvp 2>&1 | FileCheck %s
 ; RUN: llc < %s -asm-verbose=false -mtriple=wasm32-unknown-unknown -mcpu=generic 2>&1 | FileCheck %s
-; RUN: not --crash llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=generic 2>&1 | FileCheck %s  --check-prefix=WASM64
+; RUN: llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=generic 2>&1 | FileCheck %s
 ; RUN: llc < %s -asm-verbose=false -mtriple=wasm32-unknown-unknown -mcpu=bleeding-edge 2>&1 | FileCheck %s
-; RUN: not --crash llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=bleeding-edge 2>&1 | FileCheck %s  --check-prefix=WASM64
+; RUN: llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=bleeding-edge 2>&1 | FileCheck %s
 ; RUN: llc < %s -asm-verbose=false -mtriple=wasm32-unknown-unknown -mcpu=invalidcpu 2>&1 | FileCheck %s --check-prefix=INVALID
-; RUN: not --crash llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=invalidcpu 2>&1 | FileCheck %s --check-prefix=WASM64
+; RUN: llc < %s -asm-verbose=false -mtriple=wasm64-unknown-unknown-wasm -mcpu=invalidcpu 2>&1 | FileCheck %s --check-prefix=INVALID
 
 ; CHECK-NOT: is not a recognized processor for this target
 ; INVALID: {{.+}} is not a recognized processor for this target
-; WASM64: 64-bit WebAssembly (wasm64) is not currently supported
 
 define i32 @f(i32 %i_like_the_web) {
   ret i32 %i_like_the_web
 }

llvm/test/CodeGen/WebAssembly/load-ext-atomic.ll

-; RUN: llc < %s -mattr=+atomics,+sign-ext -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -mattr=+atomics,+sign-ext -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -mattr=+atomics,+sign-ext -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK64 %s
 
 ; Test that extending loads are assembled properly.
 
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
 ; CHECK-LABEL: sext_i8_i32:
 ; CHECK: i32.atomic.load8_u $push0=, 0($0){{$}}
 ; CHECK-NEXT: i32.extend8_s $push1=, $pop0{{$}}
 ; CHECK-NEXT: return $pop1{{$}}
 define i32 @sext_i8_i32(i8 *%p) {
   %v = load atomic i8, i8* %p seq_cst, align 1
   %e = sext i8 %v to i32
   ret i32 %e

llvm/test/CodeGen/WebAssembly/load-ext.ll

-; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK64 %s
 
 ; Test that extending loads are assembled properly.
 
 target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
 target triple = "wasm32-unknown-unknown"
 
 ; CHECK-LABEL: sext_i8_i32:
 ; CHECK: i32.load8_s $push0=, 0($0){{$}}
 ; CHECK-NEXT: return $pop0{{$}}
 define i32 @sext_i8_i32(i8 *%p) {
   %v = load i8, i8* %p
   %e = sext i8 %v to i32

llvm/test/CodeGen/WebAssembly/load-store-i1.ll

-; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK64 %s
 
 ; Test that i1 extending loads and truncating stores are assembled properly.
 
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
 ; CHECK-LABEL: load_u_i1_i32:
 ; CHECK:      i32.load8_u $push[[NUM0:[0-9]+]]=, 0($0){{$}}
 ; CHECK-NEXT: return $pop[[NUM0]]{{$}}
 define i32 @load_u_i1_i32(i1* %p) {
   %v = load i1, i1* %p
   %e = zext i1 %v to i32
   ret i32 %e
 }

llvm/test/CodeGen/WebAssembly/load.ll

-; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck %s
-; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers -fast-isel -fast-isel-abort=1 | FileCheck %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers -fast-isel -fast-isel-abort=1 | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK64 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers -fast-isel -fast-isel-abort=1 | FileCheck --check-prefixes CHECK,CHK64 %s
 
 ; Test that basic loads are assembled properly.
 
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
 ; CHECK-LABEL: ldi32:
-; CHECK-NEXT: .functype ldi32 (i32) -> (i32){{$}}
+; CHK32-NEXT: .functype ldi32 (i32) -> (i32){{$}}
+; CHK64-NEXT: .functype ldi32 (i64) -> (i32){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: i32.load $push[[NUM:[0-9]+]]=, 0($pop[[L0]]){{$}}
 ; CHECK-NEXT: return $pop[[NUM]]{{$}}
 define i32 @ldi32(i32 *%p) {
   %v = load i32, i32* %p
   ret i32 %v
 }
 
 ; CHECK-LABEL: ldi64:
-; CHECK-NEXT: .functype ldi64 (i32) -> (i64){{$}}
+; CHK32-NEXT: .functype ldi64 (i32) -> (i64){{$}}
+; CHK64-NEXT: .functype ldi64 (i64) -> (i64){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: i64.load $push[[NUM:[0-9]+]]=, 0($pop[[L0]]){{$}}
 ; CHECK-NEXT: return $pop[[NUM]]{{$}}
 define i64 @ldi64(i64 *%p) {
   %v = load i64, i64* %p
   ret i64 %v
 }
 
 ; CHECK-LABEL: ldf32:
-; CHECK-NEXT: .functype ldf32 (i32) -> (f32){{$}}
+; CHK32-NEXT: .functype ldf32 (i32) -> (f32){{$}}
+; CHK64-NEXT: .functype ldf32 (i64) -> (f32){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: f32.load $push[[NUM:[0-9]+]]=, 0($pop[[L0]]){{$}}
 ; CHECK-NEXT: return $pop[[NUM]]{{$}}
 define float @ldf32(float *%p) {
   %v = load float, float* %p
   ret float %v
 }
 
 ; CHECK-LABEL: ldf64:
-; CHECK-NEXT: .functype ldf64 (i32) -> (f64){{$}}
+; CHK32-NEXT: .functype ldf64 (i32) -> (f64){{$}}
+; CHK64-NEXT: .functype ldf64 (i64) -> (f64){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: f64.load $push[[NUM:[0-9]+]]=, 0($pop[[L0]]){{$}}
 ; CHECK-NEXT: return $pop[[NUM]]{{$}}
 define double @ldf64(double *%p) {
   %v = load double, double* %p
   ret double %v
 }

llvm/test/CodeGen/WebAssembly/store-trunc-atomic.ll

-; RUN: llc < %s -mattr=+atomics,+sign-ext -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -mattr=+atomics,+sign-ext -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -mattr=+atomics,+sign-ext -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK64 %s
 
 ; Test that truncating stores are assembled properly.
 
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
 ; CHECK-LABEL: trunc_i8_i32:
 ; CHECK: i32.atomic.store8 0($0), $1{{$}}
 define void @trunc_i8_i32(i8 *%p, i32 %v) {
   %t = trunc i32 %v to i8
   store atomic i8 %t, i8* %p seq_cst, align 1
   ret void
 }
 

llvm/test/CodeGen/WebAssembly/store-trunc.ll

-; RUN: llc < %s -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -asm-verbose=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK64 %s
 
 ; Test that truncating stores are assembled properly.
 
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
 ; CHECK-LABEL: trunc_i8_i32:
 ; CHECK: i32.store8 0($0), $1{{$}}
 define void @trunc_i8_i32(i8 *%p, i32 %v) {
   %t = trunc i32 %v to i8
   store i8 %t, i8* %p
   ret void
 }
 

llvm/test/CodeGen/WebAssembly/store.ll

-; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck %s
-; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers -fast-isel -fast-isel-abort=1 | FileCheck %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm32-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers -fast-isel -fast-isel-abort=1 | FileCheck --check-prefixes CHECK,CHK32 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers | FileCheck --check-prefixes CHECK,CHK64 %s
+; RUN: llc < %s --mtriple=wasm64-unknown-unknown -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-keep-registers -fast-isel -fast-isel-abort=1 | FileCheck --check-prefixes CHECK,CHK64 %s
 
 ; Test that basic stores are assembled properly.
 
 target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
 target triple = "wasm32-unknown-unknown"
 
 ; CHECK-LABEL: sti32:
-; CHECK-NEXT: .functype sti32 (i32, i32) -> (){{$}}
+; CHK32-NEXT: .functype sti32 (i32, i32) -> (){{$}}
+; CHK64-NEXT: .functype sti32 (i64, i32) -> (){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: local.get $push[[L1:[0-9]+]]=, 1{{$}}
 ; CHECK-NEXT: i32.store 0($pop[[L0]]), $pop[[L1]]{{$}}
 ; CHECK-NEXT: return{{$}}
 define void @sti32(i32 *%p, i32 %v) {
   store i32 %v, i32* %p
   ret void
 }
 
 ; CHECK-LABEL: sti64:
-; CHECK-NEXT: .functype sti64 (i32, i64) -> (){{$}}
+; CHK32-NEXT: .functype sti64 (i32, i64) -> (){{$}}
+; CHK64-NEXT: .functype sti64 (i64, i64) -> (){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: local.get $push[[L1:[0-9]+]]=, 1{{$}}
 ; CHECK-NEXT: i64.store 0($pop[[L0]]), $pop[[L1]]{{$}}
 ; CHECK-NEXT: return{{$}}
 define void @sti64(i64 *%p, i64 %v) {
   store i64 %v, i64* %p
   ret void
 }
 
 ; CHECK-LABEL: stf32:
-; CHECK-NEXT: .functype stf32 (i32, f32) -> (){{$}}
+; CHK32-NEXT: .functype stf32 (i32, f32) -> (){{$}}
+; CHK64-NEXT: .functype stf32 (i64, f32) -> (){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: local.get $push[[L1:[0-9]+]]=, 1{{$}}
 ; CHECK-NEXT: f32.store 0($pop[[L0]]), $pop[[L1]]{{$}}
 ; CHECK-NEXT: return{{$}}
 define void @stf32(float *%p, float %v) {
   store float %v, float* %p
   ret void
 }
 
 ; CHECK-LABEL: stf64:
-; CHECK-NEXT: .functype stf64 (i32, f64) -> (){{$}}
+; CHK32-NEXT: .functype stf64 (i32, f64) -> (){{$}}
+; CHK64-NEXT: .functype stf64 (i64, f64) -> (){{$}}
 ; CHECK-NEXT: local.get $push[[L0:[0-9]+]]=, 0{{$}}
 ; CHECK-NEXT: local.get $push[[L1:[0-9]+]]=, 1{{$}}
 ; CHECK-NEXT: f64.store 0($pop[[L0]]), $pop[[L1]]{{$}}
 ; CHECK-NEXT: return{{$}}
 define void @stf64(double *%p, double %v) {
   store double %v, double* %p
   ret void
 }

llvm/test/MC/WebAssembly/wasm64.s

+# RUN: llvm-mc -triple=wasm64-unknown-unknown -mattr=+atomics,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling < %s | FileCheck %s
+# Check that it converts to .o without errors, but don't check any output:
+# RUN: llvm-mc -triple=wasm64-unknown-unknown -filetype=obj -mattr=+atomics,+unimplemented-simd128,+nontrapping-fptoint,+exception-handling -o %t.o < %s
+
+# Most of our other tests are for wasm32, this one adds some wasm64 specific tests.
+
+test:
+    .functype   test (i64) -> ()
+    .local      i64
+
+    ### basic loads
+
+    i64.const   0         # get i64 from constant.
+    f32.load    0
+    drop
+
+    local.get   0         # get i64 from local.
+    f32.load    0
+    drop
+
+#    i64.const   .L.str    # get i64 relocatable.
+#    f32.load    0
+#    drop
+
+    global.get  myglob64  # get i64 from global
+    f32.load    0
+    drop
+
+    ### basic stores
+
+    f32.const   0.0
+    i64.const   0         # get i64 from constant.
+    f32.store   0
+
+    f32.const   0.0
+    local.get   0         # get i64 from local.
+    f32.store   0
+
+#    f32.const   0.0
+#    i64.const   .L.str    # get i64 relocatable.
+#    f32.store   0
+
+    f32.const   0.0
+    global.get  myglob64  # get i64 from global
+    f32.store   0
+
+    end_function
+
+    .section    .rodata..L.str,"",@
+    .hidden     .L.str
+    .type       .L.str,@object
+.L.str:
+    .asciz      "Hello, World!"
+
+    .globaltype myglob64, i64
+
+
+
+# CHECK:              .functype       test (i64) -> ()
+# CHECK-NEXT:         .local          i64
+
+
+# CHECK:              i64.const       0
+# CHECK-NEXT:         f32.load        0
+# CHECK-NEXT:         drop
+
+# CHECK:              local.get       0
+# CHECK-NEXT:         f32.load        0
+# CHECK-NEXT:         drop
+
+# NCHECK:              i64.const       .L.str
+# NCHECK-NEXT:         f32.load        0
+# NCHECK-NEXT:         drop
+
+# CHECK:              global.get      myglob64
+# CHECK-NEXT:         f32.load        0
+# CHECK-NEXT:         drop
+
+
+# CHECK:              f32.const       0x0p0
+# CHECK-NEXT:         i64.const       0
+# CHECK-NEXT:         f32.store       0
+
+# CHECK:              f32.const       0x0p0
+# CHECK-NEXT:         local.get       0
+# CHECK-NEXT:         f32.store       0
+
+# NCHECK:              f32.const       0x0p0
+# NCHECK-NEXT:         i64.const       .L.str
+# NCHECK-NEXT:         f32.store       0
+
+# CHECK:              f32.const       0x0p0
+# CHECK-NEXT:         global.get      myglob64
+# CHECK-NEXT:         f32.store       0
+
+
+# CHECK:              end_function
+# CHECK-NEXT: .Ltmp0:
+# CHECK-NEXT:         .size   test, .Ltmp0-test
+
+# CHECK:              .section        .rodata..L.str,"",@
+# CHECK-NEXT:         .hidden .L.str
+# CHECK-NEXT: .L.str:
+# CHECK-NEXT:         .asciz  "Hello, World!"
+
+# CHECK:              .globaltype     myglob64, i64