[WebAssembly] Update reloction names to match spec

[sbc100]

Summary

See https://github.com/WebAssembly/tool-conventions/blob/master/Linking.md

llvm/trunk/include/llvm/BinaryFormat/WasmRelocs/WebAssembly.def

 
 #ifndef WASM_RELOC
 #error "WASM_RELOC must be defined"
 #endif
 
 WASM_RELOC(R_WEBASSEMBLY_FUNCTION_INDEX_LEB,   0)
 WASM_RELOC(R_WEBASSEMBLY_TABLE_INDEX_SLEB,     1)
 WASM_RELOC(R_WEBASSEMBLY_TABLE_INDEX_I32,      2)
-WASM_RELOC(R_WEBASSEMBLY_GLOBAL_ADDR_LEB,      3)
-WASM_RELOC(R_WEBASSEMBLY_GLOBAL_ADDR_SLEB,     4)
-WASM_RELOC(R_WEBASSEMBLY_GLOBAL_ADDR_I32,      5)
+WASM_RELOC(R_WEBASSEMBLY_MEMORY_ADDR_LEB,      3)
+WASM_RELOC(R_WEBASSEMBLY_MEMORY_ADDR_SLEB,     4)
+WASM_RELOC(R_WEBASSEMBLY_MEMORY_ADDR_I32,      5)
 WASM_RELOC(R_WEBASSEMBLY_TYPE_INDEX_LEB,       6)
 WASM_RELOC(R_WEBASSEMBLY_GLOBAL_INDEX_LEB,     7)

llvm/trunk/lib/MC/WasmObjectWriter.cpp

struct WasmRelocationEntry {
   WasmRelocationEntry(uint64_t Offset, const MCSymbolWasm *Symbol,
                       int64_t Addend, unsigned Type,
                       const MCSectionWasm *FixupSection)
       : Offset(Offset), Symbol(Symbol), Addend(Addend), Type(Type),
         FixupSection(FixupSection) {}
 
   bool hasAddend() const {
     switch (Type) {
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB:
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB:
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32:
       return true;
     default:
       return false;
     }
   }
 
   void print(raw_ostream &Out) const {
     Out << "Off=" << Offset << ", Sym=" << *Symbol << ", Addend=" << Addend
uint32_t WasmObjectWriter::getRelocationIndexValue(
   case wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB:
   case wasm::R_WEBASSEMBLY_TABLE_INDEX_I32:
     if (!IndirectSymbolIndices.count(RelEntry.Symbol))
       report_fatal_error("symbol not found table index space: " +
                          RelEntry.Symbol->getName());
     return IndirectSymbolIndices[RelEntry.Symbol];
   case wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB:
   case wasm::R_WEBASSEMBLY_GLOBAL_INDEX_LEB:
-  case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB:
-  case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB:
-  case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32:
+  case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB:
+  case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB:
+  case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32:
     if (!SymbolIndices.count(RelEntry.Symbol))
       report_fatal_error("symbol not found function/global index space: " +
                          RelEntry.Symbol->getName());
     return SymbolIndices[RelEntry.Symbol];
   case wasm::R_WEBASSEMBLY_TYPE_INDEX_LEB:
     if (!TypeIndices.count(RelEntry.Symbol))
       report_fatal_error("symbol not found in type index space: " +
                          RelEntry.Symbol->getName());
case wasm::R_WEBASSEMBLY_GLOBAL_INDEX_LEB: {
       WritePatchableSLEB(Stream, Index, Offset);
       break;
     }
     case wasm::R_WEBASSEMBLY_TABLE_INDEX_I32: {
       uint32_t Index = getRelocationIndexValue(RelEntry);
       WriteI32(Stream, Index, Offset);
       break;
     }
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB: {
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB: {
       uint32_t Value = ProvisionalValue(RelEntry);
       WritePatchableSLEB(Stream, Value, Offset);
       break;
     }
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB: {
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB: {
       uint32_t Value = ProvisionalValue(RelEntry);
       WritePatchableLEB(Stream, Value, Offset);
       break;
     }
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32: {
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32: {
       uint32_t Value = ProvisionalValue(RelEntry);
       WriteI32(Stream, Value, Offset);
       break;
     }
     default:
       llvm_unreachable("invalid relocation type");
     }
   }
void WasmObjectWriter::writeObject(MCAssembler &Asm,
   uint32_t DataAlignment = 1;
   uint32_t StackPointerGlobal = 0;
   bool HasStackPointer = false;
 
   // Populate the IsAddressTaken set.
   for (const WasmRelocationEntry &RelEntry : CodeRelocations) {
     switch (RelEntry.Type) {
     case wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB:
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB:
       IsAddressTaken.insert(RelEntry.Symbol);
       break;
     default:
       break;
     }
   }
   for (const WasmRelocationEntry &RelEntry : DataRelocations) {
     switch (RelEntry.Type) {
     case wasm::R_WEBASSEMBLY_TABLE_INDEX_I32:
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32:
       IsAddressTaken.insert(RelEntry.Symbol);
       break;
     default:
       break;
     }
   }
 
   // Populate the Imports set.

llvm/trunk/lib/Object/WasmObjectFile.cpp

while (RelocCount--) {
     Reloc.Index = readVaruint32(Ptr);
     switch (Reloc.Type) {
     case wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB:
     case wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB:
     case wasm::R_WEBASSEMBLY_TABLE_INDEX_I32:
     case wasm::R_WEBASSEMBLY_TYPE_INDEX_LEB:
     case wasm::R_WEBASSEMBLY_GLOBAL_INDEX_LEB:
       break;
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB:
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB:
-    case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB:
+    case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32:
       Reloc.Addend = readVarint32(Ptr);
       break;
     default:
       return make_error<GenericBinaryError>("Bad relocation type: " +
                                                 Twine(Reloc.Type),
                                             object_error::parse_failed);
     }
     Section->Relocations.push_back(Reloc);

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

WebAssemblyWasmObjectWriter::getRelocType(const MCValue &Target,
   bool IsFunction = IsFunctionExpr(Fixup.getValue());
 
   switch (unsigned(Fixup.getKind())) {
   case WebAssembly::fixup_code_global_index:
     return wasm::R_WEBASSEMBLY_GLOBAL_INDEX_LEB;
   case WebAssembly::fixup_code_sleb128_i32:
     if (IsFunction)
       return wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB;
-    return wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB;
+    return wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB;
   case WebAssembly::fixup_code_sleb128_i64:
     llvm_unreachable("fixup_sleb128_i64 not implemented yet");
   case WebAssembly::fixup_code_uleb128_i32:
     if (IsFunctionType(Target))
       return wasm::R_WEBASSEMBLY_TYPE_INDEX_LEB;
     if (IsFunction)
       return wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB;
-    return wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB;
+    return wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB;
   case FK_Data_4:
     if (IsFunction)
       return wasm::R_WEBASSEMBLY_TABLE_INDEX_I32;
-    return wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32;
+    return wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32;
   case FK_Data_8:
     llvm_unreachable("FK_Data_8 not implemented yet");
   default:
     llvm_unreachable("unimplemented fixup kind");
   }
 }
 
 MCObjectWriter *llvm::createWebAssemblyWasmObjectWriter(raw_pwrite_stream &OS,
                                                         bool Is64Bit) {
   MCWasmObjectTargetWriter *MOTW = new WebAssemblyWasmObjectWriter(Is64Bit);
   return createWasmObjectWriter(MOTW, OS);
 }

llvm/trunk/test/MC/WebAssembly/external-data.ll

 ; RUN: llc -mtriple wasm32-unknown-unknown-wasm -filetype=obj %s -o - | obj2yaml | FileCheck %s
 ; Verify relocations are correctly generated for addresses of externals
 ; in the data section.
 
 @myimport = external global i32, align 4
 
 @foo = global i64 7, align 4
 @bar = hidden global i32* @myimport, align 4
 
 ; CHECK:   - Type:            DATA
 ; CHECK:     Relocations:
-; CHECK:       - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+; CHECK:       - Type:            R_WEBASSEMBLY_MEMORY_ADDR_I32
 ; CHECK:         Index:           0
 ; CHECK:         Offset:          0x0000000E
 ; CHECK:     Segments:
 ; CHECK:       - SectionOffset:   6
 ; CHECK:         MemoryIndex:     0
 ; CHECK:         Offset:
 ; CHECK:           Opcode:          I32_CONST
 ; CHECK:           Value:           0
 ; CHECK:         Content:         0700000000000000FFFFFFFF
 

llvm/trunk/test/MC/WebAssembly/reloc-code.ll

entry:
     ret i32 %tmp2
 }
 
 
 ; CHECK: Format: WASM
 ; CHECK: Relocations [
 ; CHECK-NEXT:   Section (8) CODE {
 ; CHECK-NEXT:     Relocation {
-; CHECK-NEXT:       Type: R_WEBASSEMBLY_GLOBAL_ADDR_LEB (3)
+; CHECK-NEXT:       Type: R_WEBASSEMBLY_MEMORY_ADDR_LEB (3)
 ; CHECK-NEXT:       Offset: 0x9
 ; CHECK-NEXT:       Index: 0x0
 ; CHECK-NEXT:       Addend: 0
 ; CHECK-NEXT:     }
 ; CHECK-NEXT:     Relocation {
-; CHECK-NEXT:       Type: R_WEBASSEMBLY_GLOBAL_ADDR_LEB (3)
+; CHECK-NEXT:       Type: R_WEBASSEMBLY_MEMORY_ADDR_LEB (3)
 ; CHECK-NEXT:       Offset: 0x14
 ; CHECK-NEXT:       Index: 0x1
 ; CHECK-NEXT:       Addend: 0
 ; CHECK-NEXT:     }
 ; CHECK-NEXT:     Relocation {
 ; CHECK-NEXT:       Type: R_WEBASSEMBLY_TYPE_INDEX_LEB (6)
 ; CHECK-NEXT:       Offset: 0x1A
 ; CHECK-NEXT:       Index: 0x1

llvm/trunk/test/MC/WebAssembly/reloc-data.ll

 ; RUN: llc -O0 -mtriple wasm32-unknown-unknown-wasm -filetype=obj %s -o - | llvm-readobj -r -expand-relocs | FileCheck %s
 
 ; foo and bar are external and internal symbols.  a and b are pointers
 ; initialized to these locations offset by 2 and -2 elements respecitively.
 @foo = external global i32, align 4
 @bar = global i64 7, align 4
 @a = global i32* getelementptr (i32, i32* @foo, i32 2), align 8
 @b = global i64* getelementptr (i64, i64* @bar, i64 -2), align 8
 
 ; CHECK: Format: WASM
 ; CHECK: Relocations [
 ; CHECK:   Section (6) DATA {
 ; CHECK:     Relocation {
-; CHECK:       Type: R_WEBASSEMBLY_GLOBAL_ADDR_I32 (5)
+; CHECK:       Type: R_WEBASSEMBLY_MEMORY_ADDR_I32 (5)
 ; CHECK:       Offset: 0xE
 ; CHECK:       Index: 0x0
 ; CHECK:       Addend: 8
 ; CHECK:     }
 ; CHECK:     Relocation {
-; CHECK:       Type: R_WEBASSEMBLY_GLOBAL_ADDR_I32 (5)
+; CHECK:       Type: R_WEBASSEMBLY_MEMORY_ADDR_I32 (5)
 ; CHECK:       Offset: 0x16
 ; CHECK:       Index: 0x1
 ; CHECK:       Addend: -16
 ; CHECK:     }
 ; CHECK:   }
 ; CHECK: ]

llvm/trunk/test/MC/WebAssembly/unnamed-data.ll

 ; CHECK-NEXT:       - Name:            a
 ; CHECK-NEXT:         Kind:            GLOBAL
 ; CHECK-NEXT:         Index:           2
 ; CHECK-NEXT:       - Name:            b
 ; CHECK-NEXT:         Kind:            GLOBAL
 ; CHECK-NEXT:         Index:           3
 ; CHECK-NEXT:   - Type:            DATA
 ; CHECK-NEXT:     Relocations:     
-; CHECK-NEXT:       - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+; CHECK-NEXT:       - Type:            R_WEBASSEMBLY_MEMORY_ADDR_I32
 ; CHECK-NEXT:         Index:           0
 ; CHECK-NEXT:         Offset:          0x00000016
-; CHECK-NEXT:       - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+; CHECK-NEXT:       - Type:            R_WEBASSEMBLY_MEMORY_ADDR_I32
 ; CHECK-NEXT:         Index:           1
 ; CHECK-NEXT:         Offset:          0x0000001E
 ; CHECK-NEXT:     Segments:        
 ; CHECK-NEXT:       - SectionOffset:   6
 ; CHECK-NEXT:         MemoryIndex:     0
 ; CHECK-NEXT:         Offset:          
 ; CHECK-NEXT:           Opcode:          I32_CONST
 ; CHECK-NEXT:           Value:           0
 ; CHECK-NEXT:         Content:         68656C6C6F00776F726C640000000000000000000000000006000000
 ; CHECK-NEXT:   - Type:            CUSTOM
 ; CHECK-NEXT:     Name:            linking
 ; CHECK-NEXT:     DataSize:        28
 ; CHECK-NEXT:     DataAlignment:   8
 ; CHECK-NEXT:     SymbolInfo:      
 ; CHECK-NEXT: ...

llvm/trunk/test/Object/objdump-relocations.test

 ELF-MIPSEL: R_MIPS_HI16 _gp_disp
 ELF-MIPSEL: R_MIPS_LO16 _gp_disp
 ELF-MIPSEL: R_MIPS_GOT16 $.str
 ELF-MIPSEL: R_MIPS_LO16 $.str
 ELF-MIPSEL: R_MIPS_CALL16 puts
 ELF-MIPSEL: R_MIPS_CALL16 SomeOtherFunction
 
 WASM:      CODE
-WASM-NEXT: R_WEBASSEMBLY_GLOBAL_ADDR_SLEB 0+0
+WASM-NEXT: R_WEBASSEMBLY_MEMORY_ADDR_SLEB 0+0
 WASM-NEXT: R_WEBASSEMBLY_FUNCTION_INDEX_LEB 0+0
 WASM-NEXT: R_WEBASSEMBLY_FUNCTION_INDEX_LEB 1+0
 
 ELF-complex-x86-64: .text
 ELF-complex-x86-64-NEXT: R_X86_64_8 .data-4
 ELF-complex-x86-64-NEXT: R_X86_64_16 .data-4
 ELF-complex-x86-64-NEXT: R_X86_64_32 .data-4
 ELF-complex-x86-64-NEXT: R_X86_64_32S .data-4
 ELF-complex-x86-64-NEXT: R_X86_64_64 .data-4
 ELF-complex-x86-64-NEXT: R_X86_64_PC32 .data-4-P
 ELF-complex-x86-64-NEXT: R_X86_64_32 .data+0
 ELF-complex-x86-64-NEXT: R_X86_64_32 .data+4

llvm/trunk/test/ObjectYAML/wasm/data_section.yaml

 # RUN: yaml2obj %s | obj2yaml | FileCheck %s
 --- !WASM
 FileHeader:
   Version:         0x00000001
 Sections:
   - Type:            MEMORY
     Memories:
       - Initial:         0x00000003
   - Type:            DATA
     Segments:
       - MemoryIndex:      0
         Offset:
           Opcode:          I32_CONST
           Value:           4
         Content:         '10001000'
     Relocations:
-      - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+      - Type:            R_WEBASSEMBLY_MEMORY_ADDR_I32
         Index:           0
         Offset:          0x00000006
         Addend:          8
-      - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+      - Type:            R_WEBASSEMBLY_MEMORY_ADDR_I32
         Index:           0
         Offset:          0x00000006
         Addend:          -6
 ...
 # CHECK: --- !WASM
 # CHECK: FileHeader:
 # CHECK:   Version:           0x00000001
 # CHECK: Sections:
 # CHECK:   - Type:            DATA
 # CHECK-NEXT:     Relocations:
-# CHECK-NEXT:      - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+# CHECK-NEXT:      - Type:            R_WEBASSEMBLY_MEMORY_ADDR_I32
 # CHECK-NEXT:        Index:           0
 # CHECK-NEXT:        Offset:          0x00000006
 # CHECK-NEXT:        Addend:          8
-# CHECK-NEXT:      - Type:            R_WEBASSEMBLY_GLOBAL_ADDR_I32
+# CHECK-NEXT:      - Type:            R_WEBASSEMBLY_MEMORY_ADDR_I32
 # CHECK-NEXT:        Index:           0
 # CHECK-NEXT:        Offset:          0x00000006
 # CHECK-NEXT:        Addend:          -6
 # CHECK-NEXT:     Segments:
 # CHECK-NEXT:       - SectionOffset:   6
 # CHECK-NEXT:         MemoryIndex:     0
 # CHECK-NEXT:         Offset:
 # CHECK-NEXT:           Opcode:          I32_CONST
 # CHECK-NEXT:           Value:           4
 # CHECK-NEXT:         Content:         '10001000'
 # CHECK-NEXT: ...

llvm/trunk/test/tools/llvm-objdump/WebAssembly/relocations.test

 ; RUN: llc -mtriple=wasm32-unknown-unknown-wasm -filetype=obj %s -o - | llvm-objdump -r - | FileCheck %s
 
 @foo1 = hidden global i32 1, align 4
 @foo2 = hidden global i32 1, align 4
 @bar = hidden global i32* @foo2, align 4
 
 ; CHECK:      RELOCATION RECORDS FOR [DATA]:
-; CHECK-NEXT: 0000000e R_WEBASSEMBLY_GLOBAL_ADDR_I32 1+0
+; CHECK-NEXT: 0000000e R_WEBASSEMBLY_MEMORY_ADDR_I32 1+0

llvm/trunk/test/tools/llvm-readobj/relocations.test

 MACHO-ARM-NEXT:        Value: 0x4
 MACHO-ARM-NEXT:      }
 MACHO-ARM-NEXT:    }
 MACHO-ARM-NEXT:  ]
 
 WASM:      Relocations [
 WASM-NEXT:   Section (8) CODE {
 WASM-NEXT:     Relocation {
-WASM-NEXT:       Type: R_WEBASSEMBLY_GLOBAL_ADDR_SLEB (4)
+WASM-NEXT:       Type: R_WEBASSEMBLY_MEMORY_ADDR_SLEB (4)
 WASM-NEXT:       Offset: 0x4
 WASM-NEXT:       Index: 0x0
 WASM-NEXT:       Addend: 0
 WASM-NEXT:     }
 WASM-NEXT:     Relocation {
 WASM-NEXT:       Type: R_WEBASSEMBLY_FUNCTION_INDEX_LEB (0)
 WASM-NEXT:       Offset: 0xA
 WASM-NEXT:       Index: 0x0
 WASM-NEXT:     }
 WASM-NEXT:     Relocation {
 WASM-NEXT:       Type: R_WEBASSEMBLY_FUNCTION_INDEX_LEB (0)
 WASM-NEXT:       Offset: 0x11
 WASM-NEXT:       Index: 0x1
 WASM-NEXT:     }
 WASM-NEXT:   }
 WASM-NEXT: ]

llvm/trunk/tools/llvm-readobj/WasmDumper.cpp

void WasmDumper::printRelocation(const SectionRef &Section,
                                  const RelocationRef &Reloc) {
   SmallString<64> RelocTypeName;
   uint64_t RelocType = Reloc.getType();
   Reloc.getTypeName(RelocTypeName);
   const wasm::WasmRelocation &WasmReloc = Obj->getWasmRelocation(Reloc);
 
   bool HasAddend = false;
   switch (RelocType) {
-  case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB:
-  case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB:
-  case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32:
+  case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB:
+  case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB:
+  case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32:
     HasAddend = true;
     break;
   default:
     break;
   }
   if (opts::ExpandRelocs) {
     DictScope Group(W, "Relocation");
     W.printNumber("Type", RelocTypeName, RelocType);

llvm/trunk/tools/yaml2obj/yaml2wasm.cpp

int WasmWriter::writeRelocSection(raw_ostream &OS,
   encodeULEB128(Sec.Type, OS);
   encodeULEB128(Sec.Relocations.size(), OS);
 
   for (auto Reloc: Sec.Relocations) {
     encodeULEB128(Reloc.Type, OS);
     encodeULEB128(Reloc.Offset, OS);
     encodeULEB128(Reloc.Index, OS);
     switch (Reloc.Type) {
-      case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB:
-      case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB:
-      case wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32:
+      case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB:
+      case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB:
+      case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32:
         encodeULEB128(Reloc.Addend, OS);
     }
   }
   return 0;
 }
 
 
 int WasmWriter::writeWasm(raw_ostream &OS) {