forked from OSchip/llvm-project
79 lines
3.5 KiB
LLVM
79 lines
3.5 KiB
LLVM
; RUN: llc -mtriple=x86_64-pc-linux-gnu -O2 -filetype=obj < %s | llvm-dwarfdump - | FileCheck %s
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; This reproducer is based on the following C code:
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;
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; typedef struct { int a; int b; } S;
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;
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; extern int ext(int);
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;
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; int foo() {
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; S s = {123, 456};
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; ext(1);
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; s.a = ext(2);
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; ext(3);
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; s.a = 789;
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; return s.b;
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; }
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;
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; and was generated using -O2 -g -fno-inline.
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;
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; As a small note, the third dbg.value's value has been changed from %call1 to
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; undef (it would have become undef either way, but this was done to make the
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; intention of the test a bit more clear).
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; Verify that a location list entry describing s.b is started at the
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; non-overlapping undef debug value.
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; CHECK: DW_AT_location (0x00000000
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; CHECK-NEXT: {{0x[0-9a-f]+}}, [[ADDR1:0x[0-9a-f]+]]): DW_OP_constu 0x7b, DW_OP_stack_value, DW_OP_piece 0x4, DW_OP_constu 0x1c8, DW_OP_stack_value, DW_OP_piece 0x4
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; CHECK-NEXT: [[ADDR1]], [[ADDR2:0x[0-9a-f]+]]): DW_OP_piece 0x4, DW_OP_constu 0x1c8, DW_OP_stack_value, DW_OP_piece 0x4
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; CHECK-NEXT: [[ADDR2]], {{0x[0-9a-f]+}}): DW_OP_constu 0x315, DW_OP_stack_value, DW_OP_piece 0x4, DW_OP_constu 0x1c8, DW_OP_stack_value, DW_OP_piece 0x4)
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; CHECK-NEXT: DW_AT_name ("s")
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; Function Attrs: noinline nounwind uwtable
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define i32 @main() !dbg !7 {
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entry:
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call void @llvm.dbg.value(metadata i32 123, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !18
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call void @llvm.dbg.value(metadata i32 456, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 32, 32)), !dbg !18
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%call = tail call i32 @ext(i32 1), !dbg !19
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%call1 = tail call i32 @ext(i32 2), !dbg !20
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call void @llvm.dbg.value(metadata i32 undef, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !18
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%call2 = tail call i32 @ext(i32 3), !dbg !21
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call void @llvm.dbg.value(metadata i32 789, metadata !12, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32)), !dbg !18
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ret i32 456, !dbg !22
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}
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declare i32 @ext(i32)
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #0
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attributes #0 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "undef.c", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!6 = !{!"clang version 9.0.0"}
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!7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 5, type: !8, scopeLine: 5, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "s", scope: !7, file: !1, line: 6, type: !13)
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!13 = !DIDerivedType(tag: DW_TAG_typedef, name: "S", file: !1, line: 1, baseType: !14)
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!14 = distinct !DICompositeType(tag: DW_TAG_structure_type, file: !1, line: 1, size: 64, elements: !15)
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!15 = !{!16, !17}
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!16 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !14, file: !1, line: 1, baseType: !10, size: 32)
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!17 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !14, file: !1, line: 1, baseType: !10, size: 32, offset: 32)
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!18 = !DILocation(line: 6, scope: !7)
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!19 = !DILocation(line: 7, scope: !7)
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!20 = !DILocation(line: 8, scope: !7)
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!21 = !DILocation(line: 9, scope: !7)
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!22 = !DILocation(line: 11, scope: !7)
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