ccb5b9bbfb
Previoulsy debug-info-for-profiling and pseudo-probe-for-profiling are mutual exclusive because they compete the dwarf discrimnator for callsites on the IR. This changes allows to use the two switches together. The side effect is that callsite discriminators will be taken by pseudo probe, while discriminators for other instructions are still available for AutoFDO use. This is less than ideal, however, it still allows us a chance to smoothly transition from AutoFDO to CSSPGO, by collecting both profiles from a CSSPGO binary. Reviewed By: wenlei, wmi Differential Revision: https://reviews.llvm.org/D107876
72 lines
3.8 KiB
LLVM
72 lines
3.8 KiB
LLVM
; RUN: opt < %s -passes='default<O2>' -new-pm-debug-info-for-profiling -S | FileCheck %s --check-prefix=DEBUG
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; RUN: opt < %s -passes='default<O2>' -new-pm-debug-info-for-profiling -new-pm-pseudo-probe-for-profiling -S | FileCheck %s --check-prefix=PROBE
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; RUN: opt < %s -passes='thinlto-pre-link<O2>' -new-pm-debug-info-for-profiling -new-pm-pseudo-probe-for-profiling -S | FileCheck %s --check-prefix=PROBE
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@a = dso_local global i32 0, align 4
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; Function Attrs: uwtable
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define void @_Z3foov(i32 %x) #0 !dbg !4 {
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bb0:
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%cmp = icmp eq i32 %x, 0, !dbg !10
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br i1 %cmp, label %bb1, label %bb2
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bb1:
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; DEBUG: call void @_Z3barv(), !dbg ![[CALL1:[0-9]+]]
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; PROBE: call void @_Z3barv(), !dbg ![[CALL1:[0-9]+]]
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call void @_Z3barv(), !dbg !10
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; DEBUG: call void @_Z3barv(), !dbg ![[CALL2:[0-9]+]]
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; PROBE: call void @_Z3barv(), !dbg ![[CALL2:[0-9]+]]
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call void @_Z3barv(), !dbg !11
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ret void, !dbg !13
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bb2:
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; DEBUG: store i32 8, i32* @a, align 4, !dbg ![[INST:[0-9]+]]
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; PROBE: store i32 8, i32* @a, align 4, !dbg ![[INST:[0-9]+]]
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store i32 8, i32* @a, align 4, !dbg !12
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br label %bb3
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bb3:
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ret void, !dbg !12
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}
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declare void @_Z3barv() #1
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind argmemonly
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) nounwind argmemonly
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attributes #0 = { uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "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" "frame-pointer"="all" "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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!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: NoDebug, enums: !2)
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!1 = !DIFile(filename: "c.cc", directory: "/tmp")
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!2 = !{}
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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, unit: !0, retainedNodes: !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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; DEBUG: ![[CALL1]] = !DILocation(line: 4, column: 3, scope: ![[CALL1BLOCK:[0-9]+]])
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; DEBUG: ![[CALL1BLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 2)
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; DEBUG: ![[CALL2]] = !DILocation(line: 4, column: 9, scope: ![[CALL2BLOCK:[0-9]+]])
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; DEBUG: ![[CALL2BLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 8)
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; DEBUG: ![[INST]] = !DILocation(line: 4, column: 15, scope: ![[INSTBLOCK:[0-9]+]])
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; DEBUG: ![[INSTBLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 4)
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; PROBE: ![[CALL1]] = !DILocation(line: 4, column: 3, scope: ![[CALL1BLOCK:[0-9]+]])
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; PROBE: ![[CALL1BLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 186646575)
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; PROBE: ![[CALL2]] = !DILocation(line: 4, column: 9, scope: ![[CALL2BLOCK:[0-9]+]])
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; PROBE: ![[CALL2BLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 186646583)
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; PROBE: ![[INST]] = !DILocation(line: 4, column: 15, scope: ![[INSTBLOCK:[0-9]+]])
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; PROBE: ![[INSTBLOCK]] = !DILexicalBlockFile({{.*}} discriminator: 4)
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