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1e2fb2b2c4
This change has 2 components: Target-independent: add a method getDwarfFrameBase to TargetFrameLowering. It describes how the Dwarf frame base will be encoded. That can be a register (the default), the CFA (which replaces NVPTX-specific logic in DwarfCompileUnit), or a DW_OP_WASM_location descriptr. WebAssembly: Allow WebAssemblyFunctionInfo::getFrameRegister to return the correct virtual register instead of FP32/SP32 after WebAssemblyReplacePhysRegs has run. Make WebAssemblyExplicitLocals store the local it allocates for the frame register. Use this local information to implement getDwarfFrameBase The result is that the DW_AT_frame_base attribute is correctly encoded for each subprogram, and each param and local variable has a correct DW_AT_location that uses DW_OP_fbreg to refer to the frame base. This is a reland of rG3a05c3969c18 with fixes for the expensive-checks and Windows builds Differential Revision: https://reviews.llvm.org/D71681
97 lines
4.9 KiB
LLVM
97 lines
4.9 KiB
LLVM
; RUN: llc -filetype=obj %s -o - | llvm-dwarfdump - | FileCheck %s
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; CHECK: .debug_info contents:
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; CHECK-NEXT: 0x00000000: Compile Unit: length = 0x0000006b version = 0x0004 abbr_offset = 0x0000 addr_size = 0x04 (next unit at 0x0000006f)
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; CHECK: 0x0000000b: DW_TAG_compile_unit
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; CHECK-NEXT: DW_AT_producer ("clang version 6.0.0 (trunk 315924) (llvm/trunk 315960)")
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; CHECK-NEXT: DW_AT_language (DW_LANG_C99)
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; CHECK-NEXT: DW_AT_name ("test.c")
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; CHECK-NEXT: DW_AT_stmt_list (0x00000000)
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; CHECK-NEXT: DW_AT_comp_dir ("/usr/local/google/home/sbc/dev/wasm/simple")
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; CHECK-NEXT: DW_AT_GNU_pubnames (true)
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; CHECK-NEXT: DW_AT_low_pc (0x0000000000000002)
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; CHECK-NEXT: DW_AT_high_pc (0x0000000000000004)
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; CHECK: 0x00000026: DW_TAG_variable
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; CHECK-NEXT: DW_AT_name ("foo")
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; CHECK-NEXT: DW_AT_type (0x00000037 "int*")
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; CHECK-NEXT: DW_AT_external (true)
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; CHECK-NEXT: DW_AT_decl_file ("/usr/local/google/home/sbc/dev/wasm/simple{{[/\\]}}test.c")
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; CHECK-NEXT: DW_AT_decl_line (4)
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; CHECK-NEXT: DW_AT_location (DW_OP_addr 0x0)
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; CHECK: 0x00000037: DW_TAG_pointer_type
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; CHECK-NEXT: DW_AT_type (0x0000003c "int")
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; CHECK: 0x0000003c: DW_TAG_base_type
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; CHECK-NEXT: DW_AT_name ("int")
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; CHECK-NEXT: DW_AT_encoding (DW_ATE_signed)
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; CHECK-NEXT: DW_AT_byte_size (0x04)
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; CHECK: 0x00000043: DW_TAG_variable
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; CHECK-NEXT: DW_AT_name ("ptr2")
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; CHECK-NEXT: DW_AT_type (0x00000054 "void()*")
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; CHECK-NEXT: DW_AT_external (true)
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; CHECK-NEXT: DW_AT_decl_file ("/usr/local/google/home/sbc/dev/wasm/simple{{[/\\]}}test.c")
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; CHECK-NEXT: DW_AT_decl_line (5)
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; CHECK-NEXT: DW_AT_location (DW_OP_addr 0x4)
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; CHECK: 0x00000054: DW_TAG_pointer_type
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; CHECK-NEXT: DW_AT_type (0x00000059 "void()")
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; CHECK: 0x00000059: DW_TAG_subroutine_type
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; CHECK-NEXT: DW_AT_prototyped (true)
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; CHECK: 0x0000005a: DW_TAG_subprogram
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; CHECK-NEXT: DW_AT_low_pc (0x0000000000000002)
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; CHECK-NEXT: DW_AT_high_pc (0x0000000000000004)
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; CHECK-NEXT: DW_AT_frame_base (DW_OP_WASM_location 0x1 +0, DW_OP_stack_value)
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; CHECK-NEXT: DW_AT_name ("f2")
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; CHECK-NEXT: DW_AT_decl_file ("/usr/local/google/home/sbc/dev/wasm/simple{{[/\\]}}test.c")
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; CHECK-NEXT: DW_AT_decl_line (2)
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; CHECK-NEXT: DW_AT_prototyped (true)
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; CHECK-NEXT: DW_AT_external (true)
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; CHECK: 0x0000006e: NULL
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target triple = "wasm32-unknown-unknown"
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source_filename = "test.c"
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@myextern = external global i32, align 4
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@foo = hidden global i32* @myextern, align 4, !dbg !0
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@ptr2 = hidden global void ()* @f2, align 4, !dbg !6
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; Function Attrs: noinline nounwind optnone
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define hidden void @f2() #0 !dbg !17 {
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entry:
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ret void, !dbg !18
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}
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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" }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!13, !14, !15}
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!llvm.ident = !{!16}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "foo", scope: !2, file: !3, line: 4, type: !11, isLocal: false, isDefinition: true)
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!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)
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!3 = !DIFile(filename: "test.c", directory: "/usr/local/google/home/sbc/dev/wasm/simple")
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!4 = !{}
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!5 = !{!0, !6}
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!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
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!7 = distinct !DIGlobalVariable(name: "ptr2", scope: !2, file: !3, line: 5, type: !8, isLocal: false, isDefinition: true)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null}
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!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 32)
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!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!13 = !{i32 2, !"Dwarf Version", i32 4}
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!14 = !{i32 2, !"Debug Info Version", i32 3}
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!15 = !{i32 1, !"wchar_size", i32 4}
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!16 = !{!"clang version 6.0.0 (trunk 315924) (llvm/trunk 315960)"}
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!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)
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!18 = !DILocation(line: 2, column: 16, scope: !17)
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