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d52939585a
The discriminators pass relied on the presence of llvm.dbg.cu to decide whether to add discriminators, but this fails in the case where debug info is only enabled partially when -fprofile-sample-use is active. The reason llvm.dbg.cu is not present in these cases is to prevent codegen from emitting debug info (as it is only used for the sample profile pass). This changes the discriminators pass to also emit discriminators even when debug info is not being emitted. llvm-svn: 252763
53 lines
2.8 KiB
LLVM
53 lines
2.8 KiB
LLVM
; RUN: opt < %s -add-discriminators -S | FileCheck %s
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; Discriminator support for calls that are defined in one line:
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; #1 void bar();
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; #2
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; #3 void foo() {
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; #4 bar();bar()/*discriminator 1*/;bar()/*discriminator 2*/;
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; #5 }
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; Function Attrs: uwtable
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define void @_Z3foov() #0 {
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call void @_Z3barv(), !dbg !10
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; CHECK: call void @_Z3barv(), !dbg ![[CALL0:[0-9]+]]
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call void @_Z3barv(), !dbg !11
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; CHECK: call void @_Z3barv(), !dbg ![[CALL1:[0-9]+]]
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call void @_Z3barv(), !dbg !12
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; CHECK: call void @_Z3barv(), !dbg ![[CALL2:[0-9]+]]
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ret void, !dbg !13
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}
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declare void @_Z3barv() #1
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attributes #0 = { uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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; We should be able to add discriminators even in the absence of llvm.dbg.cu.
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; When using sample profiles, the front end will generate line tables but it
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; does not generate llvm.dbg.cu to prevent codegen from emitting debug info
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; to the final binary.
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; !llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8}
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!llvm.ident = !{!9}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 250915) (llvm/trunk 251830)", isOptimized: false, runtimeVersion: 0, emissionKind: 1, enums: !2, subprograms: !3)
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!1 = !DIFile(filename: "c.cc", directory: "/tmp")
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!2 = !{}
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!3 = !{!4}
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!4 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foov", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null}
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{!"clang version 3.8.0 (trunk 250915) (llvm/trunk 251830)"}
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!10 = !DILocation(line: 4, column: 3, scope: !4)
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!11 = !DILocation(line: 4, column: 9, scope: !4)
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!12 = !DILocation(line: 4, column: 15, scope: !4)
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!13 = !DILocation(line: 5, column: 1, scope: !4)
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; CHECK: ![[CALL1]] = !DILocation(line: 4, column: 9, scope: ![[CALL1BLOCK:[0-9]+]])
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; CHECK: ![[CALL1BLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 1)
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; CHECK: ![[CALL2]] = !DILocation(line: 4, column: 15, scope: ![[CALL2BLOCK:[0-9]+]])
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; CHECK: ![[CALL2BLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 2)
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