Index: llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCAsmInfo.cpp =================================================================== --- llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCAsmInfo.cpp +++ llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyMCAsmInfo.cpp @@ -23,7 +23,9 @@ WebAssemblyMCAsmInfo::WebAssemblyMCAsmInfo(const Triple &T, const MCTargetOptions &Options) { - CodePointerSize = CalleeSaveStackSlotSize = T.isArch64Bit() ? 8 : 4; + CalleeSaveStackSlotSize = T.isArch64Bit() ? 8 : 4; + // So far this is used for DWARF DW_AT_low_pc which is always 32-bit in Wasm. + CodePointerSize = 4; // TODO: What should MaxInstLength be? Index: llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp =================================================================== --- llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp +++ llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp @@ -124,6 +124,15 @@ case FK_Data_8: if (SymA.isFunction()) return wasm::R_WASM_TABLE_INDEX_I64; + if (SymA.isGlobal()) + llvm_unreachable("unimplemented R_WASM_GLOBAL_INDEX_I64"); + if (auto Section = static_cast( + getFixupSection(Fixup.getValue()))) { + if (Section->getKind().isText()) + llvm_unreachable("unimplemented R_WASM_FUNCTION_OFFSET_I64"); + else if (!Section->isWasmData()) + llvm_unreachable("unimplemented R_WASM_SECTION_OFFSET_I64"); + } assert(SymA.isData()); return wasm::R_WASM_MEMORY_ADDR_I64; default: Index: llvm/test/MC/WebAssembly/dwarfdump64.ll =================================================================== --- /dev/null +++ llvm/test/MC/WebAssembly/dwarfdump64.ll @@ -0,0 +1,102 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc -filetype=obj %s -o - | llvm-dwarfdump --show-form - | FileCheck %s + +; CHECK: .debug_info contents: +; CHECK-NEXT: 0x00000000: Compile Unit: length = 0x0000006e, format = DWARF32, version = 0x0004, abbr_offset = 0x0000, addr_size = 0x04 (next unit at 0x00000072) + +; CHECK: 0x0000000b: DW_TAG_compile_unit +; CHECK-NEXT: DW_AT_producer [DW_FORM_strp] ("clang version 6.0.0 (trunk 315924) (llvm/trunk 315960)") +; CHECK-NEXT: DW_AT_language [DW_FORM_data2] (DW_LANG_C99) +; CHECK-NEXT: DW_AT_name [DW_FORM_strp] ("test.c") +; CHECK-NEXT: DW_AT_stmt_list [DW_FORM_sec_offset] (0x00000000) +; CHECK-NEXT: DW_AT_comp_dir [DW_FORM_strp] ("/usr/local/google/home/sbc/dev/wasm/simple") +; CHECK-NEXT: DW_AT_GNU_pubnames [DW_FORM_flag_present] (true) +; CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr] (0x00000002) +; CHECK-NEXT: DW_AT_high_pc [DW_FORM_data4] (0x00000002) + +; CHECK: 0x00000026: DW_TAG_variable +; CHECK-NEXT: DW_AT_name [DW_FORM_strp] ("foo") +; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (0x00000037 "int*") +; CHECK-NEXT: DW_AT_external [DW_FORM_flag_present] (true) +; CHECK-NEXT: DW_AT_decl_file [DW_FORM_data1] ("/usr/local/google/home/sbc/dev/wasm/simple\test.c") +; CHECK-NEXT: DW_AT_decl_line [DW_FORM_data1] (4) +; CHECK-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_addr 0x0) + +; CHECK: 0x00000037: DW_TAG_pointer_type +; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (0x0000003c "int") + +; CHECK: 0x0000003c: DW_TAG_base_type +; CHECK-NEXT: DW_AT_name [DW_FORM_strp] ("int") +; CHECK-NEXT: DW_AT_encoding [DW_FORM_data1] (DW_ATE_signed) +; CHECK-NEXT: DW_AT_byte_size [DW_FORM_data1] (0x04) + +; CHECK: 0x00000043: DW_TAG_variable +; CHECK-NEXT: DW_AT_name [DW_FORM_strp] ("ptr2") +; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (0x00000054 "void()*") +; CHECK-NEXT: DW_AT_external [DW_FORM_flag_present] (true) +; CHECK-NEXT: DW_AT_decl_file [DW_FORM_data1] ("/usr/local/google/home/sbc/dev/wasm/simple\test.c") +; CHECK-NEXT: DW_AT_decl_line [DW_FORM_data1] (5) + + + +; TODO: is this correct? + +; CHECK-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_addr 0x8) + +; CHECK: 0x00000054: DW_TAG_pointer_type +; CHECK-NEXT: DW_AT_type [DW_FORM_ref4] (0x00000059 "void()") + +; CHECK: 0x00000059: DW_TAG_subroutine_type +; CHECK-NEXT: DW_AT_prototyped [DW_FORM_flag_present] (true) + +; CHECK: 0x0000005a: DW_TAG_subprogram +; CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr] (0x00000002) +; CHECK-NEXT: DW_AT_high_pc [DW_FORM_data4] (0x00000002) +; CHECK-NEXT: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_WASM_location 0x3 0x0, DW_OP_stack_value) +; CHECK-NEXT: DW_AT_name [DW_FORM_strp] ("f2") +; CHECK-NEXT: DW_AT_decl_file [DW_FORM_data1] ("/usr/local/google/home/sbc/dev/wasm/simple\test.c") +; CHECK-NEXT: DW_AT_decl_line [DW_FORM_data1] (2) +; CHECK-NEXT: DW_AT_prototyped [DW_FORM_flag_present] (true) +; CHECK-NEXT: DW_AT_external [DW_FORM_flag_present] (true) + +; CHECK: 0x00000071: NULL + +target triple = "wasm64-unknown-unknown" + +source_filename = "test.c" + +@myextern = external global i32, align 4 +@foo = hidden global i32* @myextern, align 4, !dbg !0 +@ptr2 = hidden global void ()* @f2, align 4, !dbg !6 + +; Function Attrs: noinline nounwind optnone +define hidden void @f2() #0 !dbg !17 { +entry: + ret void, !dbg !18 +} + +attributes #0 = { noinline nounwind optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "unsafe-fp-math"="false" "use-soft-float"="false" } + +!llvm.dbg.cu = !{!2} +!llvm.module.flags = !{!13, !14, !15} +!llvm.ident = !{!16} + +!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) +!1 = distinct !DIGlobalVariable(name: "foo", scope: !2, file: !3, line: 4, type: !11, isLocal: false, isDefinition: true) +!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 6.0.0 (trunk 315924) (llvm/trunk 315960)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) +!3 = !DIFile(filename: "test.c", directory: "/usr/local/google/home/sbc/dev/wasm/simple") +!4 = !{} +!5 = !{!0, !6} +!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression()) +!7 = distinct !DIGlobalVariable(name: "ptr2", scope: !2, file: !3, line: 5, type: !8, isLocal: false, isDefinition: true) +!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64) +!9 = !DISubroutineType(types: !10) +!10 = !{null} +!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) +!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) +!13 = !{i32 2, !"Dwarf Version", i32 4} +!14 = !{i32 2, !"Debug Info Version", i32 3} +!15 = !{i32 1, !"wchar_size", i32 4} +!16 = !{!"clang version 6.0.0 (trunk 315924) (llvm/trunk 315960)"} +!17 = distinct !DISubprogram(name: "f2", scope: !3, file: !3, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: false, unit: !2, retainedNodes: !4) +!18 = !DILocation(line: 2, column: 16, scope: !17)