derek.holloway
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77 lines
3.6 KiB
LLVM
77 lines
3.6 KiB
LLVM
; REQUIRES: asserts && x86-registered-target
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; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-stale-profile-unused-probe-desc.prof --salvage-stale-profile --salvage-unused-profile -S --debug-only=sample-profile,sample-profile-matcher,sample-profile-impl --min-call-count-for-cg-matching=0 --min-func-count-for-cg-matching=0 2>&1 | FileCheck %s
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;; Test scenario (post-link):
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;;
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;; int main() {
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;; // optimized away in pre-link
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;; foo_hot();
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;; if (false)
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;; foo_cold();
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;; return 0;
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;; }
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;;
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;; - Profile: main calls foo_hot, but never calls foo_cold.
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;; - Post-link IR: foo_hot was optimized away in pre-link and its probe descriptor persists
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;; in !llvm.pseudo_probe_desc.
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;; - Expected result: foo_cold is not matched to foo_hot's profile.
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; CHECK: Function foo_cold is not in profile or profile symbol list.
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; CHECK: Run stale profile matching for main
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; CHECK-NOT: Function:foo_cold matches profile:foo_hot
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define dso_local void @foo_cold() #0 !dbg !11 {
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entry:
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call void @llvm.pseudoprobe(i64 5929568435854063828, i64 1, i32 0, i64 -1), !dbg !13
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ret void, !dbg !14
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}
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define dso_local i32 @main() #0 !dbg !15 {
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entry:
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call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 1, i32 0, i64 -1), !dbg !18
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br i1 false, label %if.then, label %if.end, !dbg !23
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if.then:
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call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 2, i32 0, i64 -1), !dbg !24
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call void @foo_cold(), !dbg !19
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br label %if.end
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if.end:
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call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 4, i32 0, i64 -1), !dbg !25
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ret i32 0, !dbg !21
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}
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declare void @llvm.pseudoprobe(i64, i64, i32, i64)
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attributes #0 = { nounwind uwtable "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "use-sample-profile" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.pseudo_probe_desc = !{!6, !7, !8}
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!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp")
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!2 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!3 = !{i32 7, !"Dwarf Version", i32 5}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 7, !"uwtable", i32 2}
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!6 = !{i64 5929568435854063828, i64 844429225099263, !"foo_cold"}
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!7 = !{i64 -2624081020897602054, i64 1126003093360596, !"main"}
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!8 = !{i64 -2908166055299645123, i64 844429225099263, !"foo_hot"}
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!9 = !DISubroutineType(types: !10)
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!10 = !{null}
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!11 = distinct !DISubprogram(name: "foo_cold", scope: !1, file: !1, line: 2, type: !9, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!12 = !DISubroutineType(types: !22)
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!13 = !DILocation(line: 3, column: 1, scope: !11)
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!14 = !DILocation(line: 4, column: 1, scope: !11)
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!15 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 10, type: !12, scopeLine: 10, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!18 = !DILocation(line: 11, column: 1, scope: !15)
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!19 = !DILocation(line: 13, column: 5, scope: !20)
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!20 = !DILexicalBlockFile(scope: !15, file: !1, discriminator: 186646559)
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!21 = !DILocation(line: 16, column: 1, scope: !15)
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!22 = !{!2}
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!23 = !DILocation(line: 12, column: 3, scope: !15)
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!24 = !DILocation(line: 13, column: 3, scope: !15)
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!25 = !DILocation(line: 15, column: 1, scope: !15)
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!26 = distinct !DISubprogram(name: "foo_hot", scope: !1, file: !1, line: 5, type: !9, scopeLine: 5, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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