forked from OSchip/llvm-project
101 lines
4.2 KiB
LLVM
101 lines
4.2 KiB
LLVM
; RUN: llc < %s -filetype=obj | llvm-dwarfdump -v - --debug-info | FileCheck %s
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;
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; IR module created as follows:
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; clang -emit-llvm -S -O2 foo.cpp -o foo.ll -g
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; clang -emit-llvm -S -O2 bar.cpp -o bar.ll -gmlt
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; llvm-link foo.ll bar.ll -S -o linked.ll
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; opt -std-link-opts linked.ll -S -o opt.ll
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; --- foo.cpp ---
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; void f();
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; void foo(int param) {
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; if (param) f();
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; }
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; --- bar.cpp ---
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; void foo(int);
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; void bar() {
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; foo(0);
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; }
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; ---
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; The point is that bar() is compiled -gmlt and calls foo() with a constant 0.
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; foo() is compiled -g and gets inlined into bar(); foo's body is then
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; optimized away, leaving only a dbg.value call describing the inlined copy
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; of 'param', which should be benign.
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; That is, the compile-unit for bar.cpp should have nothing in it.
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; PR31437.
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; foo.cpp's unit comes first; skip past it, second unit should be empty.
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; CHECK: DW_TAG_compile_unit
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; CHECK-NOT: {{DW_TAG|NULL}}
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; CHECK: DW_AT_name {{.*}} "foo.cpp"
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; CHECK: DW_TAG_compile_unit
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; CHECK-NOT: DW_TAG
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; ModuleID = 'linked.ll'
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source_filename = "llvm-link"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: uwtable
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define void @_Z3fooi(i32 %param) local_unnamed_addr #0 !dbg !8 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 %param, metadata !13, metadata !14), !dbg !15
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%tobool = icmp eq i32 %param, 0, !dbg !16
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br i1 %tobool, label %if.end, label %if.then, !dbg !18
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if.then: ; preds = %entry
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tail call void @_Z1fv(), !dbg !19
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br label %if.end, !dbg !19
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if.end: ; preds = %if.then, %entry
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ret void, !dbg !21
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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declare void @_Z1fv() local_unnamed_addr #2
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; Function Attrs: nounwind readnone uwtable
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define void @_Z3barv() local_unnamed_addr #3 !dbg !22 {
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entry:
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tail call void @llvm.dbg.value(metadata i32 0, metadata !13, metadata !14), !dbg !24
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ret void, !dbg !26
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}
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attributes #0 = { uwtable }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind }
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attributes #3 = { nounwind readnone uwtable }
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!llvm.dbg.cu = !{!0, !3}
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!llvm.ident = !{!5, !5}
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!llvm.module.flags = !{!6, !7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 5.0.0 (trunk 293745)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "foo.cpp", directory: "/home/probinson/projects/scratch/pr31437")
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!2 = !{}
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!3 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !4, producer: "clang version 5.0.0 (trunk 293745)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
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!4 = !DIFile(filename: "bar.cpp", directory: "/home/probinson/projects/scratch/pr31437")
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!5 = !{!"clang version 5.0.0 (trunk 293745)"}
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!6 = !{i32 2, !"Dwarf Version", i32 4}
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!7 = !{i32 2, !"Debug Info Version", i32 3}
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!8 = distinct !DISubprogram(name: "foo", linkageName: "_Z3fooi", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null, !11}
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !{!13}
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!13 = !DILocalVariable(name: "param", arg: 1, scope: !8, file: !1, line: 2, type: !11)
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!14 = !DIExpression()
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!15 = !DILocation(line: 2, column: 14, scope: !8)
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!16 = !DILocation(line: 3, column: 7, scope: !17)
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!17 = distinct !DILexicalBlock(scope: !8, file: !1, line: 3, column: 7)
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!18 = !DILocation(line: 3, column: 7, scope: !8)
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!19 = !DILocation(line: 3, column: 14, scope: !20)
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!20 = !DILexicalBlockFile(scope: !17, file: !1, discriminator: 1)
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!21 = !DILocation(line: 4, column: 1, scope: !8)
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!22 = distinct !DISubprogram(name: "bar", scope: !4, file: !4, line: 2, type: !23, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !3, retainedNodes: !2)
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!23 = !DISubroutineType(types: !2)
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!24 = !DILocation(line: 2, column: 14, scope: !8, inlinedAt: !25)
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!25 = distinct !DILocation(line: 3, column: 3, scope: !22)
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!26 = !DILocation(line: 4, column: 1, scope: !22)
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