GlobalISel: Consolidate load/store legalization

[arsenm]

Summary

The fewerElementsVectors implementation for load/stores
handles the scalar reduction case just as well, so drop
the redundant code in narrowScalar. This also introduces
support for narrowing irregular size breakdowns for scalars.

[arsenm]

Merge related bug fix for scalars

[paquette]

lib/CodeGen/GlobalISel/LegalizerHelper.cpp

582–584

Are these atomic checks still handled somewhere?

[aemerson]

lib/CodeGen/GlobalISel/LegalizerHelper.cpp

582–584

Looks like it's handled in reduceLoadStoreWidth.

[arsenm]

lib/CodeGen/GlobalISel/LegalizerHelper.cpp

582–584

Yes, those were missing from the vector version but I fixed that in r352334, so now both cases are In reduceLoadStoreWidth

[aemerson]

LGTM.

[arsenm]

r353121

include/llvm/CodeGen/GlobalISel/LegalizerHelper.h

private:
 
   LegalizeResult
   fewerElementsVectorCmp(MachineInstr &MI, unsigned TypeIdx, LLT NarrowTy);
 
   LegalizeResult
   fewerElementsVectorSelect(MachineInstr &MI, unsigned TypeIdx, LLT NarrowTy);
 
   LegalizeResult
-  fewerElementsVectorLoadStore(MachineInstr &MI, unsigned TypeIdx, LLT NarrowTy);
+  reduceLoadStoreWidth(MachineInstr &MI, unsigned TypeIdx, LLT NarrowTy);
 
   LegalizeResult narrowScalarMul(MachineInstr &MI, unsigned TypeIdx, LLT Ty);
 
   LegalizeResult lowerBitCount(MachineInstr &MI, unsigned TypeIdx, LLT Ty);
 
   MachineRegisterInfo &MRI;
   const LegalizerInfo &LI;
   /// To keep track of changes made by the LegalizerHelper.

lib/CodeGen/GlobalISel/LegalizerHelper.cpp

case TargetOpcode::G_INSERT: {
     if(MRI.getType(DstReg).isVector())
       MIRBuilder.buildBuildVector(DstReg, DstRegs);
     else
       MIRBuilder.buildMerge(DstReg, DstRegs);
     MI.eraseFromParent();
     return Legalized;
   }
   case TargetOpcode::G_LOAD: {
-    // FIXME: add support for when SizeOp0 isn't an exact multiple of
-    // NarrowSize.
-    if (SizeOp0 % NarrowSize != 0)
-      return UnableToLegalize;
-
     const auto &MMO = **MI.memoperands_begin();
     unsigned DstReg = MI.getOperand(0).getReg();
     LLT DstTy = MRI.getType(DstReg);
+    if (DstTy.isVector())
+      return UnableToLegalize;
 
     if (8 * MMO.getSize() != DstTy.getSizeInBits()) {
       unsigned TmpReg = MRI.createGenericVirtualRegister(NarrowTy);
       auto &MMO = **MI.memoperands_begin();
       MIRBuilder.buildLoad(TmpReg, MI.getOperand(1).getReg(), MMO);
       MIRBuilder.buildAnyExt(DstReg, TmpReg);
       MI.eraseFromParent();
       return Legalized;
     }
 
-    // This implementation doesn't work for atomics. Give up instead of doing
-    // something invalid.
-    if (MMO.getOrdering() != AtomicOrdering::NotAtomic ||
-        MMO.getFailureOrdering() != AtomicOrdering::NotAtomic)
-      return UnableToLegalize;
-
-    int NumParts = SizeOp0 / NarrowSize;
-    LLT OffsetTy = LLT::scalar(
-        MRI.getType(MI.getOperand(1).getReg()).getScalarSizeInBits());
-
-    MachineFunction &MF = MIRBuilder.getMF();
-    SmallVector<unsigned, 2> DstRegs;
-    for (int i = 0; i < NumParts; ++i) {
-      unsigned DstReg = MRI.createGenericVirtualRegister(NarrowTy);
-      unsigned SrcReg = 0;
-      unsigned Offset = i * NarrowSize / 8;
-
-      MachineMemOperand *SplitMMO =
-          MF.getMachineMemOperand(&MMO, Offset, NarrowSize / 8);
-
-      MIRBuilder.materializeGEP(SrcReg, MI.getOperand(1).getReg(), OffsetTy,
-                                Offset);
-
-      MIRBuilder.buildLoad(DstReg, SrcReg, *SplitMMO);
-
-      DstRegs.push_back(DstReg);
-    }
-
-    if (DstTy.isVector())
-      MIRBuilder.buildBuildVector(DstReg, DstRegs);
-    else
-      MIRBuilder.buildMerge(DstReg, DstRegs);
-    MI.eraseFromParent();
-    return Legalized;
+    return reduceLoadStoreWidth(MI, TypeIdx, NarrowTy);
   }
   case TargetOpcode::G_ZEXTLOAD:
   case TargetOpcode::G_SEXTLOAD: {
     bool ZExt = MI.getOpcode() == TargetOpcode::G_ZEXTLOAD;
     unsigned DstReg = MI.getOperand(0).getReg();
     unsigned PtrReg = MI.getOperand(1).getReg();
 
     unsigned TmpReg = MRI.createGenericVirtualRegister(NarrowTy);
if (ZExt)
       MIRBuilder.buildZExt(DstReg, TmpReg);
     else
       MIRBuilder.buildSExt(DstReg, TmpReg);
 
     MI.eraseFromParent();
     return Legalized;
   }
   case TargetOpcode::G_STORE: {
-    // FIXME: add support for when SizeOp0 isn't an exact multiple of
-    // NarrowSize.
-    if (SizeOp0 % NarrowSize != 0)
-      return UnableToLegalize;
-
     const auto &MMO = **MI.memoperands_begin();
 
     unsigned SrcReg = MI.getOperand(0).getReg();
     LLT SrcTy = MRI.getType(SrcReg);
+    if (SrcTy.isVector())
+      return UnableToLegalize;
+
+    int NumParts = SizeOp0 / NarrowSize;
+    unsigned HandledSize = NumParts * NarrowTy.getSizeInBits();
+    unsigned LeftoverBits = SrcTy.getSizeInBits() - HandledSize;
+    if (SrcTy.isVector() && LeftoverBits != 0)
+      return UnableToLegalize;
 
     if (8 * MMO.getSize() != SrcTy.getSizeInBits()) {
       unsigned TmpReg = MRI.createGenericVirtualRegister(NarrowTy);
       auto &MMO = **MI.memoperands_begin();
       MIRBuilder.buildTrunc(TmpReg, SrcReg);
       MIRBuilder.buildStore(TmpReg, MI.getOperand(1).getReg(), MMO);
       MI.eraseFromParent();
       return Legalized;
     }
 
-    // This implementation doesn't work for atomics. Give up instead of doing
-    // something invalid.
-    if (MMO.getOrdering() != AtomicOrdering::NotAtomic ||
-        MMO.getFailureOrdering() != AtomicOrdering::NotAtomic)
-      return UnableToLegalize;
-
-    int NumParts = SizeOp0 / NarrowSize;
-    LLT OffsetTy = LLT::scalar(
-        MRI.getType(MI.getOperand(1).getReg()).getScalarSizeInBits());
-
-    SmallVector<unsigned, 2> SrcRegs;
-    extractParts(MI.getOperand(0).getReg(), NarrowTy, NumParts, SrcRegs);
-
-    MachineFunction &MF = MIRBuilder.getMF();
-    for (int i = 0; i < NumParts; ++i) {
-      unsigned DstReg = 0;
-      unsigned Offset = i * NarrowSize / 8;
-
-      MachineMemOperand *SplitMMO =
-          MF.getMachineMemOperand(&MMO, Offset, NarrowSize / 8);
-
-      MIRBuilder.materializeGEP(DstReg, MI.getOperand(1).getReg(), OffsetTy,
-                                Offset);
-
-      MIRBuilder.buildStore(SrcRegs[i], DstReg, *SplitMMO);
-    }
-    MI.eraseFromParent();
-    return Legalized;
+    return reduceLoadStoreWidth(MI, 0, NarrowTy);
   }
   case TargetOpcode::G_CONSTANT: {
     // FIXME: add support for when SizeOp0 isn't an exact multiple of
     // NarrowSize.
     if (SizeOp0 % NarrowSize != 0)
       return UnableToLegalize;
     int NumParts = SizeOp0 / NarrowSize;
     const APInt &Cst = MI.getOperand(1).getCImm()->getValue();
static int getNarrowTypeBreakDown(LLT OrigTy, LLT NarrowTy, LLT &LeftoverTy) {
   } else {
     LeftoverTy = LLT::scalar(LeftoverSize);
   }
 
   return NumParts;
 }
 
 LegalizerHelper::LegalizeResult
-LegalizerHelper::fewerElementsVectorLoadStore(MachineInstr &MI, unsigned TypeIdx,
-                                              LLT NarrowTy) {
+LegalizerHelper::reduceLoadStoreWidth(MachineInstr &MI, unsigned TypeIdx,
   // FIXME: Don't know how to handle secondary types yet.
   if (TypeIdx != 0)
     return UnableToLegalize;
 
   MachineMemOperand *MMO = *MI.memoperands_begin();
 
   // This implementation doesn't work for atomics. Give up instead of doing
   // something invalid.
case G_ADDRSPACE_CAST:
     return fewerElementsVectorCasts(MI, TypeIdx, NarrowTy);
   case G_ICMP:
   case G_FCMP:
     return fewerElementsVectorCmp(MI, TypeIdx, NarrowTy);
   case G_SELECT:
     return fewerElementsVectorSelect(MI, TypeIdx, NarrowTy);
   case G_LOAD:
   case G_STORE:
-    return fewerElementsVectorLoadStore(MI, TypeIdx, NarrowTy);
+    return reduceLoadStoreWidth(MI, TypeIdx, NarrowTy);
   default:
     return UnableToLegalize;
   }
 }
 
 LegalizerHelper::LegalizeResult
 LegalizerHelper::narrowScalarMul(MachineInstr &MI, unsigned TypeIdx, LLT NewTy) {
   unsigned DstReg = MI.getOperand(0).getReg();

lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp

.narrowScalarIf([](const LegalityQuery &Query) {
         return (Size > 32 && MemSize < Size);
       },
       [](const LegalityQuery &Query) {
         return std::make_pair(0, LLT::scalar(32));
       })
 
     .fewerElementsIf([=, &ST](const LegalityQuery &Query) {
         unsigned MemSize = Query.MMODescrs[0].SizeInBits;
-        return (MemSize == 96) &&
+        return Query.Types[0].isVector() && (MemSize == 96) &&
                ST.getGeneration() < AMDGPUSubtarget::SEA_ISLANDS;
       },
       [=](const LegalityQuery &Query) {
         return std::make_pair(0, V2S32);
       })
     .legalIf([=, &ST](const LegalityQuery &Query) {
         const LLT &Ty0 = Query.Types[0];
 

test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll

 ; FALLBACK-WITH-REPORT-ERR: warning: Instruction selection used fallback path for nonpow2_load_narrowing
 ; FALLBACK-WITH-REPORT-OUT-LABEL: nonpow2_load_narrowing:
 define void @nonpow2_load_narrowing() {
   %dummy = load i96, i96* undef
   store i96 %dummy, i96* undef
   ret void
 }
 
-; FALLBACK-WITH-REPORT-ERR: remark: <unknown>:0:0: unable to legalize instruction: G_STORE %3:_(s96), %0:_(p0) :: (store 12 into %ir.c, align 16) (in function: nonpow2_store_narrowing
+; FALLBACK-WITH-REPORT-ERR: remark: <unknown>:0:0: unable to legalize instruction: %5:_(s32) = G_EXTRACT %3:_(s96), 64 (in function: nonpow2_store_narrowing)
 ; FALLBACK-WITH-REPORT-ERR: warning: Instruction selection used fallback path for nonpow2_store_narrowing
 ; FALLBACK-WITH-REPORT-OUT-LABEL: nonpow2_store_narrowing:
 define void @nonpow2_store_narrowing(i96* %c) {
   %a = add i128 undef, undef
   %b = trunc i128 %a to i96
   store i96 %b, i96* %c
   ret void
 }
 
-; FALLBACK-WITH-REPORT-ERR: remark: <unknown>:0:0: unable to legalize instruction: G_STORE %0:_(s96), %1:_(p0) :: (store 12 into `i96* undef`, align 16) (in function: nonpow2_constant_narrowing)
+; FALLBACK-WITH-REPORT-ERR: remark: <unknown>:0:0: unable to legalize instruction: %3:_(s32) = G_EXTRACT %0:_(s96), 64 (in function: nonpow2_constant_narrowing)
 ; FALLBACK-WITH-REPORT-ERR: warning: Instruction selection used fallback path for nonpow2_constant_narrowing
 ; FALLBACK-WITH-REPORT-OUT-LABEL: nonpow2_constant_narrowing:
 define void @nonpow2_constant_narrowing() {
   store i96 0, i96* undef
   ret void
 }
 
 ; Currently can't handle vector lengths that aren't an exact multiple of

test/CodeGen/AMDGPU/GlobalISel/legalize-load.mir

bb.0:
     ; VI: [[ANYEXT:%[0-9]+]]:_(s128) = G_ANYEXT [[LOAD]](s32)
     ; VI: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY [[ANYEXT]](s128)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(s128) = G_LOAD %0 :: (load 4, addrspace 1, align 4)
     $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %1
 ...
 
 ---
-name: test_load_global_v3s32
+name: test_load_global_s96_align4
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; SI-LABEL: name: test_load_global_v3s32
+    ; SI-LABEL: name: test_load_global_s96_align4
     ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
-    ; SI: [[LOAD:%[0-9]+]]:_(<2 x s32>) = G_LOAD [[COPY]](p1) :: (load 8, align 16, addrspace 1)
+    ; SI: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[COPY]](p1) :: (load 8, align 4, addrspace 1)
     ; SI: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
     ; SI: [[GEP:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C]](s64)
-    ; SI: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[GEP]](p1) :: (load 4, align 8, addrspace 1)
-    ; SI: [[DEF:%[0-9]+]]:_(<3 x s32>) = G_IMPLICIT_DEF
-    ; SI: [[INSERT:%[0-9]+]]:_(<3 x s32>) = G_INSERT [[DEF]], [[LOAD]](<2 x s32>), 0
-    ; SI: [[INSERT1:%[0-9]+]]:_(<3 x s32>) = G_INSERT [[INSERT]], [[LOAD1]](s32), 64
-    ; SI: $vgpr0_vgpr1_vgpr2 = COPY [[INSERT1]](<3 x s32>)
-    ; VI-LABEL: name: test_load_global_v3s32
+    ; SI: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[GEP]](p1) :: (load 4, addrspace 1)
+    ; SI: [[DEF:%[0-9]+]]:_(s96) = G_IMPLICIT_DEF
+    ; SI: [[INSERT:%[0-9]+]]:_(s96) = G_INSERT [[DEF]], [[LOAD]](s64), 0
+    ; SI: [[INSERT1:%[0-9]+]]:_(s96) = G_INSERT [[INSERT]], [[LOAD1]](s32), 64
+    ; SI: $vgpr0_vgpr1_vgpr2 = COPY [[INSERT1]](s96)
+    ; VI-LABEL: name: test_load_global_s96_align4
     ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
-    ; VI: [[LOAD:%[0-9]+]]:_(<3 x s32>) = G_LOAD [[COPY]](p1) :: (load 12, align 16, addrspace 1)
-    ; VI: $vgpr0_vgpr1_vgpr2 = COPY [[LOAD]](<3 x s32>)
+    ; VI: [[LOAD:%[0-9]+]]:_(s96) = G_LOAD [[COPY]](p1) :: (load 12, align 4, addrspace 1)
+    ; VI: $vgpr0_vgpr1_vgpr2 = COPY [[LOAD]](s96)
     %0:_(p1) = COPY $vgpr0_vgpr1
-    %1:_(<3 x s32>) = G_LOAD %0 :: (load 12, addrspace 1, align 16)
+    %1:_(s96) = G_LOAD %0 :: (load 12, addrspace 1, align 4)
     $vgpr0_vgpr1_vgpr2 = COPY %1
 ...
+
+---
+name: test_load_global_s160_align4
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1
+
+    ; SI-LABEL: name: test_load_global_s160_align4
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[COPY]](p1) :: (load 8, align 4, addrspace 1)
+    ; SI: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; SI: [[GEP:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C]](s64)
+    ; SI: [[LOAD1:%[0-9]+]]:_(s64) = G_LOAD [[GEP]](p1) :: (load 8, align 4, addrspace 1)
+    ; SI: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
+    ; SI: [[GEP1:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C1]](s64)
+    ; SI: [[LOAD2:%[0-9]+]]:_(s32) = G_LOAD [[GEP1]](p1) :: (load 4, addrspace 1)
+    ; SI: [[DEF:%[0-9]+]]:_(s160) = G_IMPLICIT_DEF
+    ; SI: [[INSERT:%[0-9]+]]:_(s160) = G_INSERT [[DEF]], [[LOAD]](s64), 0
+    ; SI: [[INSERT1:%[0-9]+]]:_(s160) = G_INSERT [[INSERT]], [[LOAD1]](s64), 64
+    ; SI: [[INSERT2:%[0-9]+]]:_(s160) = G_INSERT [[INSERT1]], [[LOAD2]](s32), 128
+    ; SI: S_NOP 0, implicit [[INSERT2]](s160)
+    ; VI-LABEL: name: test_load_global_s160_align4
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[COPY]](p1) :: (load 8, align 4, addrspace 1)
+    ; VI: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; VI: [[GEP:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C]](s64)
+    ; VI: [[LOAD1:%[0-9]+]]:_(s64) = G_LOAD [[GEP]](p1) :: (load 8, align 4, addrspace 1)
+    ; VI: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
+    ; VI: [[GEP1:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C1]](s64)
+    ; VI: [[LOAD2:%[0-9]+]]:_(s32) = G_LOAD [[GEP1]](p1) :: (load 4, addrspace 1)
+    ; VI: [[DEF:%[0-9]+]]:_(s160) = G_IMPLICIT_DEF
+    ; VI: [[INSERT:%[0-9]+]]:_(s160) = G_INSERT [[DEF]], [[LOAD]](s64), 0
+    ; VI: [[INSERT1:%[0-9]+]]:_(s160) = G_INSERT [[INSERT]], [[LOAD1]](s64), 64
+    ; VI: [[INSERT2:%[0-9]+]]:_(s160) = G_INSERT [[INSERT1]], [[LOAD2]](s32), 128
+    ; VI: S_NOP 0, implicit [[INSERT2]](s160)
+    %0:_(p1) = COPY $vgpr0_vgpr1
+    %1:_(s160) = G_LOAD %0 :: (load 20, addrspace 1, align 4)
+    S_NOP 0, implicit %1
+...
+
+---
+name: test_load_global_s224_align4
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1
+
+    ; SI-LABEL: name: test_load_global_s224_align4
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[COPY]](p1) :: (load 8, align 4, addrspace 1)
+    ; SI: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; SI: [[GEP:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C]](s64)
+    ; SI: [[LOAD1:%[0-9]+]]:_(s64) = G_LOAD [[GEP]](p1) :: (load 8, align 4, addrspace 1)
+    ; SI: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
+    ; SI: [[GEP1:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C1]](s64)
+    ; SI: [[LOAD2:%[0-9]+]]:_(s64) = G_LOAD [[GEP1]](p1) :: (load 8, align 4, addrspace 1)
+    ; SI: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 24
+    ; SI: [[GEP2:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C2]](s64)
+    ; SI: [[LOAD3:%[0-9]+]]:_(s32) = G_LOAD [[GEP2]](p1) :: (load 4, addrspace 1)
+    ; SI: [[DEF:%[0-9]+]]:_(s224) = G_IMPLICIT_DEF
+    ; SI: [[INSERT:%[0-9]+]]:_(s224) = G_INSERT [[DEF]], [[LOAD]](s64), 0
+    ; SI: [[INSERT1:%[0-9]+]]:_(s224) = G_INSERT [[INSERT]], [[LOAD1]](s64), 64
+    ; SI: [[INSERT2:%[0-9]+]]:_(s224) = G_INSERT [[INSERT1]], [[LOAD2]](s64), 128
+    ; SI: [[INSERT3:%[0-9]+]]:_(s224) = G_INSERT [[INSERT2]], [[LOAD3]](s32), 192
+    ; SI: [[DEF1:%[0-9]+]]:_(s256) = G_IMPLICIT_DEF
+    ; SI: [[INSERT4:%[0-9]+]]:_(s256) = G_INSERT [[DEF1]], [[INSERT3]](s224), 0
+    ; SI: $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7 = COPY [[INSERT4]](s256)
+    ; VI-LABEL: name: test_load_global_s224_align4
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[COPY]](p1) :: (load 8, align 4, addrspace 1)
+    ; VI: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; VI: [[GEP:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C]](s64)
+    ; VI: [[LOAD1:%[0-9]+]]:_(s64) = G_LOAD [[GEP]](p1) :: (load 8, align 4, addrspace 1)
+    ; VI: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
+    ; VI: [[GEP1:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C1]](s64)
+    ; VI: [[LOAD2:%[0-9]+]]:_(s64) = G_LOAD [[GEP1]](p1) :: (load 8, align 4, addrspace 1)
+    ; VI: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 24
+    ; VI: [[GEP2:%[0-9]+]]:_(p1) = G_GEP [[COPY]], [[C2]](s64)
+    ; VI: [[LOAD3:%[0-9]+]]:_(s32) = G_LOAD [[GEP2]](p1) :: (load 4, addrspace 1)
+    ; VI: [[DEF:%[0-9]+]]:_(s224) = G_IMPLICIT_DEF
+    ; VI: [[INSERT:%[0-9]+]]:_(s224) = G_INSERT [[DEF]], [[LOAD]](s64), 0
+    ; VI: [[INSERT1:%[0-9]+]]:_(s224) = G_INSERT [[INSERT]], [[LOAD1]](s64), 64
+    ; VI: [[INSERT2:%[0-9]+]]:_(s224) = G_INSERT [[INSERT1]], [[LOAD2]](s64), 128
+    ; VI: [[INSERT3:%[0-9]+]]:_(s224) = G_INSERT [[INSERT2]], [[LOAD3]](s32), 192
+    ; VI: [[DEF1:%[0-9]+]]:_(s256) = G_IMPLICIT_DEF
+    ; VI: [[INSERT4:%[0-9]+]]:_(s256) = G_INSERT [[DEF1]], [[INSERT3]](s224), 0
+    ; VI: $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7 = COPY [[INSERT4]](s256)
+    %0:_(p1) = COPY $vgpr0_vgpr1
+    %1:_(s224) = G_LOAD %0 :: (load 28, addrspace 1, align 4)
+
+     %2:_(s256) = G_IMPLICIT_DEF
+     %3:_(s256) = G_INSERT %2, %1, 0
+     $vgpr0_vgpr1_vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7 = COPY %3
+
+...

test/CodeGen/AMDGPU/GlobalISel/legalize-store.mir

 ...
 
 ---
 name: test_truncstore_global_s128_to_s16
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2_vgpr3_vgpr4_vgpr5
 
+    ; SI-LABEL: name: test_truncstore_global_s128_to_s16
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; SI: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s128)
+    ; SI: G_STORE [[TRUNC]](s32), [[COPY]](p1) :: (store 2, addrspace 1)
+    ; VI-LABEL: name: test_truncstore_global_s128_to_s16
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; VI: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s128)
+    ; VI: G_STORE [[TRUNC]](s32), [[COPY]](p1) :: (store 2, addrspace 1)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
     G_STORE %1, %0 :: (store 2, addrspace 1)
 ...
 
 ---
 name: test_truncstore_global_s128_to_s8
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2_vgpr3_vgpr4_vgpr5
 
+    ; SI-LABEL: name: test_truncstore_global_s128_to_s8
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; SI: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s128)
+    ; SI: G_STORE [[TRUNC]](s32), [[COPY]](p1) :: (store 1, addrspace 1)
+    ; VI-LABEL: name: test_truncstore_global_s128_to_s8
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; VI: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY1]](s128)
+    ; VI: G_STORE [[TRUNC]](s32), [[COPY]](p1) :: (store 1, addrspace 1)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
     G_STORE %1, %0 :: (store 1, addrspace 1)
 ...
 
 name: test_store_global_i1
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2
 
-    ; CHECK-LABEL: name: test_store_global_i1
-    ; CHECK: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr2
-    ; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
-    ; CHECK: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
-    ; CHECK: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C]]
-    ; CHECK: G_STORE [[AND]](s32), [[COPY]](p1) :: (store 1, addrspace 1)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(s32) = COPY $vgpr2
     %2:_(s1) = G_TRUNC %1
     G_STORE %2, %0 :: (store 1, addrspace 1)
 ...
 
 ---
 name: test_store_global_i8
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2
 
-    ; CHECK-LABEL: name: test_store_global_i8
-    ; CHECK: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr2
-    ; CHECK: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
-    ; CHECK: G_STORE [[COPY2]](s32), [[COPY]](p1) :: (store 1, addrspace 1)
+    ; SI-LABEL: name: test_store_global_i8
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; SI: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; SI: G_STORE [[COPY2]](s32), [[COPY]](p1) :: (store 1, addrspace 1)
+    ; VI-LABEL: name: test_store_global_i8
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; VI: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; VI: G_STORE [[COPY2]](s32), [[COPY]](p1) :: (store 1, addrspace 1)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(s32) = COPY $vgpr2
     %2:_(s8) = G_TRUNC %1
     G_STORE %2, %0 :: (store 1, addrspace 1)
 ...
 
 ---
 name: test_store_global_i16
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2
 
-    ; CHECK-LABEL: name: test_store_global_i16
-    ; CHECK: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr2
-    ; CHECK: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
-    ; CHECK: G_STORE [[COPY2]](s32), [[COPY]](p1) :: (store 2, addrspace 1)
+    ; SI-LABEL: name: test_store_global_i16
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; SI: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; SI: G_STORE [[COPY2]](s32), [[COPY]](p1) :: (store 2, addrspace 1)
+    ; VI-LABEL: name: test_store_global_i16
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; VI: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; VI: G_STORE [[COPY2]](s32), [[COPY]](p1) :: (store 2, addrspace 1)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(s32) = COPY $vgpr2
     %2:_(s16) = G_TRUNC %1
     G_STORE %2, %0 :: (store 2, addrspace 1)
 ...
 
 ---
+name: test_store_global_96
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1_vgpr2, $vgpr3_vgpr4
+
+    ; SI-LABEL: name: test_store_global_96
+    ; SI: [[COPY:%[0-9]+]]:_(s96) = COPY $vgpr0_vgpr1_vgpr2
+    ; SI: [[COPY1:%[0-9]+]]:_(p1) = COPY $vgpr3_vgpr4
+    ; SI: [[EXTRACT:%[0-9]+]]:_(s64) = G_EXTRACT [[COPY]](s96), 0
+    ; SI: [[EXTRACT1:%[0-9]+]]:_(s32) = G_EXTRACT [[COPY]](s96), 64
+    ; SI: G_STORE [[EXTRACT]](s64), [[COPY1]](p1) :: (store 8, align 16, addrspace 1)
+    ; SI: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
+    ; SI: [[GEP:%[0-9]+]]:_(p1) = G_GEP [[COPY1]], [[C]](s64)
+    ; SI: G_STORE [[EXTRACT1]](s32), [[GEP]](p1) :: (store 4, align 8, addrspace 1)
+    ; VI-LABEL: name: test_store_global_96
+    ; VI: [[COPY:%[0-9]+]]:_(s96) = COPY $vgpr0_vgpr1_vgpr2
+    ; VI: [[COPY1:%[0-9]+]]:_(p1) = COPY $vgpr3_vgpr4
+    ; VI: G_STORE [[COPY]](s96), [[COPY1]](p1) :: (store 12, align 16, addrspace 1)
+    %0:_(s96) = COPY $vgpr0_vgpr1_vgpr2
+    %1:_(p1) = COPY $vgpr3_vgpr4
+
+    G_STORE %0, %1 :: (store 12, addrspace 1, align 16)
+...
+
+---
 name: test_store_global_i128
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2_vgpr3_vgpr4_vgpr5
 
-    ; CHECK-LABEL: name: test_store_global_i128
-    ; CHECK: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
-    ; CHECK: G_STORE [[COPY1]](s128), [[COPY]](p1) :: (store 16, addrspace 1)
+    ; SI-LABEL: name: test_store_global_i128
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; SI: G_STORE [[COPY1]](s128), [[COPY]](p1) :: (store 16, addrspace 1)
+    ; VI-LABEL: name: test_store_global_i128
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; VI: G_STORE [[COPY1]](s128), [[COPY]](p1) :: (store 16, addrspace 1)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(s128) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
     G_STORE %1, %0 :: (store 16, addrspace 1)
 ...
 
 ---
 name: test_store_global_v2s64
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2_vgpr3_vgpr4_vgpr5
 
-    ; CHECK-LABEL: name: test_store_global_v2s64
-    ; CHECK: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
-    ; CHECK: G_STORE [[COPY1]](<2 x s64>), [[COPY]](p1) :: (store 16, addrspace 1)
+    ; SI-LABEL: name: test_store_global_v2s64
+    ; SI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; SI: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; SI: G_STORE [[COPY1]](<2 x s64>), [[COPY]](p1) :: (store 16, addrspace 1)
+    ; VI-LABEL: name: test_store_global_v2s64
+    ; VI: [[COPY:%[0-9]+]]:_(p1) = COPY $vgpr0_vgpr1
+    ; VI: [[COPY1:%[0-9]+]]:_(<2 x s64>) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
+    ; VI: G_STORE [[COPY1]](<2 x s64>), [[COPY]](p1) :: (store 16, addrspace 1)
     %0:_(p1) = COPY $vgpr0_vgpr1
     %1:_(<2 x s64>) = COPY $vgpr2_vgpr3_vgpr4_vgpr5
     G_STORE %1, %0 :: (store 16, addrspace 1)
 
 ...

test/CodeGen/X86/GlobalISel/x86_64-fallback.ll

 ; RUN: llc -O0 -mtriple=x86_64-linux-gnu -global-isel -global-isel-abort=2 -pass-remarks-missed='gisel*' -verify-machineinstrs %s -o %t.out 2> %t.err
 ; RUN: FileCheck %s --check-prefix=FALLBACK-WITH-REPORT-OUT < %t.out
 ; RUN: FileCheck %s --check-prefix=FALLBACK-WITH-REPORT-ERR < %t.err
 ; This file checks that the fallback path to selection dag works.
 ; The test is fragile in the sense that it must be updated to expose
 ; something that fails with global-isel.
 ; When we cannot produce a test case anymore, that means we can remove
 ; the fallback path.
 
 ; Check that we fallback on invoke translation failures.
-; FALLBACK-WITH-REPORT-ERR: remark: <unknown>:0:0: unable to legalize instruction: G_STORE %1:_(s80), %0:_(p0) :: (store 10 into %ir.ptr, align 16) (in function: test_x86_fp80_dump)
+; FALLBACK-WITH-REPORT-ERR: remark: <unknown>:0:0: unable to legalize instruction: %3:_(s16) = G_EXTRACT %1:_(s80), 64 (in function: test_x86_fp80_dump)
 ; FALLBACK-WITH-REPORT-ERR: warning: Instruction selection used fallback path for test_x86_fp80_dump
 ; FALLBACK-WITH-REPORT-OUT-LABEL: test_x86_fp80_dump:
 define void @test_x86_fp80_dump(x86_fp80* %ptr){
   store x86_fp80 0xK4002A000000000000000, x86_fp80* %ptr, align 16
   ret void
 }
 
 ; Check that we fallback on byVal argument