; REQUIRES: x86_64-linux ; REQUIRES: asserts ; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/pseudo-probe-stale-profile-matching.prof --salvage-stale-profile -S --debug-only=sample-profile,sample-profile-impl 2>&1 | FileCheck %s ; The profiled source code: ; volatile int x = 1; ; __attribute__((noinline)) int bar(int p) { ; return p; ; } ; __attribute__((always_inline)) int foo(int i, int p) { ; if (i % 10) return bar(p); ; else return bar(p + 1); ; } ; int main() { ; for (int i = 0; i < 1000 * 1000; i++) { ; x += foo(i, x); ; x += bar(x); ; x += foo(i, x); ; x += bar(x); ; } ; } ; The source code for the current build: ; volatile int x = 1; ; __attribute__((noinline)) int bar(int p) { ; return p; ; } ; __attribute__((always_inline)) int foo(int i, int p) { ; if (i % 10) return bar(p); ; else return bar(p + 1); ; } ; int main() { ; if (x == 0) // code change ; return 0; // code change ; for (int i = 0; i < 1000 * 1000; i++) { ; x += foo(i, x); ; x += bar(x); ; if (i < 0) // code change ; return 0; // code change ; x += foo(i, x); ; x += bar(x); ; } ; } ; CHECK: Run stale profile matching for main ; CHECK: Location is matched from 1 to 1 ; CHECK: Location is matched from 2 to 2 ; CHECK: Location is matched from 3 to 3 ; CHECK: Location is matched from 4 to 4 ; CHECK: Location is matched from 5 to 5 ; CHECK: Location is matched from 6 to 6 ; CHECK: Location is matched from 7 to 7 ; CHECK: Location is matched from 8 to 8 ; CHECK: Location is matched from 9 to 9 ; CHECK: Location is matched from 10 to 10 ; CHECK: Location is matched from 11 to 11 ; CHECK: Callsite with callee:foo is matched from 13 to 6 ; CHECK: Location is rematched backwards from 7 to 0 ; CHECK: Location is rematched backwards from 8 to 1 ; CHECK: Location is rematched backwards from 9 to 2 ; CHECK: Location is rematched backwards from 10 to 3 ; CHECK: Location is rematched backwards from 11 to 4 ; CHECK: Callsite with callee:bar is matched from 14 to 7 ; CHECK: Callsite with callee:foo is matched from 15 to 8 ; CHECK: Callsite with callee:bar is matched from 16 to 9 ; CHECK: 2: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 2, i32 0, i64 -1), !dbg ![[#]] - weight: 112 - factor: 1.00) ; CHECK: 3: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 3, i32 0, i64 -1), !dbg ![[#]] - weight: 112 - factor: 1.00) ; CHECK: 4: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 4, i32 0, i64 -1), !dbg ![[#]] - weight: 116 - factor: 1.00) ; CHECK: 5: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 5, i32 0, i64 -1), !dbg ![[#]] - weight: 0 - factor: 1.00) ; CHECK: 1: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 1, i32 0, i64 -1), !dbg ![[#]] - weight: 112 - factor: 1.00) ; CHECK: 2: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 2, i32 0, i64 -1), !dbg ![[#]] - weight: 101 - factor: 1.00) ; CHECK: 5: %call.i8 = call i32 @bar(i32 noundef %1), !dbg ![[#]] - weight: 101 - factor: 1.00) ; CHECK: 3: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 3, i32 0, i64 -1), !dbg ![[#]] - weight: 13 - factor: 1.00) ; CHECK: 6: %call1.i5 = call i32 @bar(i32 noundef %add.i4), !dbg ![[#]] - weight: 13 - factor: 1.00) ; CHECK: 4: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 4, i32 0, i64 -1), !dbg ![[#]] - weight: 112 - factor: 1.00) ; CHECK: 14: %call2 = call i32 @bar(i32 noundef %3), !dbg ![[#]] - weight: 124 - factor: 1.00) ; CHECK: 8: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 8, i32 0, i64 -1), !dbg ![[#]] - weight: 0 - factor: 1.00) ; CHECK: 1: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 1, i32 0, i64 -1), !dbg ![[#]] - weight: 117 - factor: 1.00) ; CHECK: 2: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 2, i32 0, i64 -1), !dbg ![[#]] - weight: 104 - factor: 1.00) ; CHECK: 5: %call.i = call i32 @bar(i32 noundef %5), !dbg ![[#]] - weight: 104 - factor: 1.00) ; CHECK: 3: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 3, i32 0, i64 -1), !dbg ![[#]] - weight: 13 - factor: 1.00) ; CHECK: 6: %call1.i = call i32 @bar(i32 noundef %add.i), !dbg ![[#]] - weight: 14 - factor: 1.00) ; CHECK: 4: call void @llvm.pseudoprobe(i64 6699318081062747564, i64 4, i32 0, i64 -1), !dbg ![[#]] - weight: 121 - factor: 1.00) ; CHECK: 16: %call9 = call i32 @bar(i32 noundef %7), !dbg ![[#]] - weight: 126 - factor: 1.00) ; CHECK: 9: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 9, i32 0, i64 -1), !dbg ![[#]] - weight: 112 - factor: 1.00) ; CHECK: 10: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 10, i32 0, i64 -1), !dbg ![[#]] - weight: 112 - factor: 1.00) ; CHECK: 11: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 11, i32 0, i64 -1), !dbg ![[#]] - weight: 116 - factor: 1.00) ; CHECK: 1: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 1, i32 0, i64 -1), !dbg ![[#]] - weight: 0 - factor: 1.00) target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" @x = dso_local global i32 1, align 4, !dbg !0 ; Function Attrs: noinline nounwind uwtable define dso_local i32 @bar(i32 noundef %p) #0 !dbg !16 { entry: call void @llvm.dbg.value(metadata i32 %p, metadata !20, metadata !DIExpression()), !dbg !21 call void @llvm.pseudoprobe(i64 -2012135647395072713, i64 1, i32 0, i64 -1), !dbg !22 ret i32 %p, !dbg !23 } ; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 ; Function Attrs: alwaysinline nounwind uwtable define dso_local i32 @foo(i32 noundef %i, i32 noundef %p) #2 !dbg !24 { entry: call void @llvm.dbg.value(metadata i32 %i, metadata !28, metadata !DIExpression()), !dbg !30 call void @llvm.dbg.value(metadata i32 %p, metadata !29, metadata !DIExpression()), !dbg !30 call void @llvm.pseudoprobe(i64 6699318081062747564, i64 1, i32 0, i64 -1), !dbg !31 %rem = srem i32 %i, 10, !dbg !33 %tobool = icmp ne i32 %rem, 0, !dbg !33 br i1 %tobool, label %if.then, label %if.else, !dbg !34 if.then: ; preds = %entry call void @llvm.pseudoprobe(i64 6699318081062747564, i64 2, i32 0, i64 -1), !dbg !35 %call = call i32 @bar(i32 noundef %p), !dbg !36 br label %return, !dbg !38 if.else: ; preds = %entry call void @llvm.pseudoprobe(i64 6699318081062747564, i64 3, i32 0, i64 -1), !dbg !39 %add = add nsw i32 %p, 1, !dbg !40 %call1 = call i32 @bar(i32 noundef %add), !dbg !41 br label %return, !dbg !43 return: ; preds = %if.else, %if.then %retval.0 = phi i32 [ %call, %if.then ], [ %call1, %if.else ], !dbg !44 call void @llvm.pseudoprobe(i64 6699318081062747564, i64 4, i32 0, i64 -1), !dbg !45 ret i32 %retval.0, !dbg !45 } ; Function Attrs: nounwind uwtable define dso_local i32 @main() #3 !dbg !46 { entry: call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 1, i32 0, i64 -1), !dbg !52 %0 = load volatile i32, ptr @x, align 4, !dbg !52, !tbaa !54 %cmp = icmp eq i32 %0, 0, !dbg !58 br i1 %cmp, label %if.then, label %if.end, !dbg !59 if.then: ; preds = %entry call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 2, i32 0, i64 -1), !dbg !60 br label %for.end, !dbg !60 if.end: ; preds = %entry call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 3, i32 0, i64 -1), !dbg !61 call void @llvm.dbg.value(metadata i32 0, metadata !50, metadata !DIExpression()), !dbg !62 br label %for.cond, !dbg !63 for.cond: ; preds = %if.end6, %if.end %i.0 = phi i32 [ 0, %if.end ], [ %inc, %if.end6 ], !dbg !64 call void @llvm.dbg.value(metadata i32 %i.0, metadata !50, metadata !DIExpression()), !dbg !62 call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 4, i32 0, i64 -1), !dbg !65 %cmp1 = icmp slt i32 %i.0, 1000000, !dbg !67 br i1 %cmp1, label %for.body, label %for.cond.cleanup, !dbg !68 for.cond.cleanup: ; preds = %for.cond call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 5, i32 0, i64 -1), !dbg !68 br label %cleanup, !dbg !68 for.body: ; preds = %for.cond call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 6, i32 0, i64 -1), !dbg !69 %1 = load volatile i32, ptr @x, align 4, !dbg !71, !tbaa !54 %call = call i32 @foo(i32 noundef %i.0, i32 noundef %1), !dbg !72 %2 = load volatile i32, ptr @x, align 4, !dbg !74, !tbaa !54 %add = add nsw i32 %2, %call, !dbg !74 store volatile i32 %add, ptr @x, align 4, !dbg !74, !tbaa !54 %3 = load volatile i32, ptr @x, align 4, !dbg !75, !tbaa !54 %call2 = call i32 @bar(i32 noundef %3), !dbg !76 %4 = load volatile i32, ptr @x, align 4, !dbg !78, !tbaa !54 %add3 = add nsw i32 %4, %call2, !dbg !78 store volatile i32 %add3, ptr @x, align 4, !dbg !78, !tbaa !54 br i1 false, label %if.then5, label %if.end6, !dbg !79 if.then5: ; preds = %for.body call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 7, i32 0, i64 -1), !dbg !80 br label %cleanup, !dbg !80 if.end6: ; preds = %for.body call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 8, i32 0, i64 -1), !dbg !82 %5 = load volatile i32, ptr @x, align 4, !dbg !83, !tbaa !54 %call7 = call i32 @foo(i32 noundef %i.0, i32 noundef %5), !dbg !84 %6 = load volatile i32, ptr @x, align 4, !dbg !86, !tbaa !54 %add8 = add nsw i32 %6, %call7, !dbg !86 store volatile i32 %add8, ptr @x, align 4, !dbg !86, !tbaa !54 %7 = load volatile i32, ptr @x, align 4, !dbg !87, !tbaa !54 %call9 = call i32 @bar(i32 noundef %7), !dbg !88 %8 = load volatile i32, ptr @x, align 4, !dbg !90, !tbaa !54 %add10 = add nsw i32 %8, %call9, !dbg !90 store volatile i32 %add10, ptr @x, align 4, !dbg !90, !tbaa !54 call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 9, i32 0, i64 -1), !dbg !91 %inc = add nsw i32 %i.0, 1, !dbg !91 call void @llvm.dbg.value(metadata i32 %inc, metadata !50, metadata !DIExpression()), !dbg !62 br label %for.cond, !dbg !92, !llvm.loop !93 cleanup: ; preds = %if.then5, %for.cond.cleanup call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 10, i32 0, i64 -1), !dbg !96 br label %for.end for.end: ; preds = %cleanup, %if.then call void @llvm.pseudoprobe(i64 -2624081020897602054, i64 11, i32 0, i64 -1), !dbg !97 ret i32 0, !dbg !97 } ; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #4 ; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #4 ; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) #1 ; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: readwrite) declare void @llvm.pseudoprobe(i64, i64, i32, i64) #5 ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) declare void @llvm.dbg.value(metadata, metadata, metadata) #6 attributes #0 = { noinline nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" } attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) } attributes #2 = { alwaysinline nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" } attributes #3 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" } attributes #4 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) } attributes #5 = { mustprogress nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: readwrite) } attributes #6 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } !llvm.dbg.cu = !{!2} !llvm.module.flags = !{!7, !8, !9, !10, !11} !llvm.ident = !{!12} !llvm.pseudo_probe_desc = !{!13, !14, !15} !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) !1 = distinct !DIGlobalVariable(name: "x", scope: !2, file: !3, line: 1, type: !5, isLocal: false, isDefinition: true) !2 = distinct !DICompileUnit(language: DW_LANG_C11, file: !3, producer: "clang version 17.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !4, splitDebugInlining: false, nameTableKind: None) !3 = !DIFile(filename: "test.c", directory: "path") !4 = !{!0} !5 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6) !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) !7 = !{i32 7, !"Dwarf Version", i32 5} !8 = !{i32 2, !"Debug Info Version", i32 3} !9 = !{i32 1, !"wchar_size", i32 4} !10 = !{i32 7, !"uwtable", i32 2} !11 = !{i32 7, !"debug-info-assignment-tracking", i1 true} !12 = !{!"clang version 17.0.0"} !13 = !{i64 -2012135647395072713, i64 4294967295, !"bar"} !14 = !{i64 6699318081062747564, i64 563022570642068, !"foo"} !15 = !{i64 -2624081020897602054, i64 1126158552146340, !"main"} !16 = distinct !DISubprogram(name: "bar", scope: !3, file: !3, line: 2, type: !17, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !19) !17 = !DISubroutineType(types: !18) !18 = !{!6, !6} !19 = !{!20} !20 = !DILocalVariable(name: "p", arg: 1, scope: !16, file: !3, line: 2, type: !6) !21 = !DILocation(line: 0, scope: !16) !22 = !DILocation(line: 3, column: 10, scope: !16) !23 = !DILocation(line: 3, column: 3, scope: !16) !24 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 6, type: !25, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !27) !25 = !DISubroutineType(types: !26) !26 = !{!6, !6, !6} !27 = !{!28, !29} !28 = !DILocalVariable(name: "i", arg: 1, scope: !24, file: !3, line: 6, type: !6) !29 = !DILocalVariable(name: "p", arg: 2, scope: !24, file: !3, line: 6, type: !6) !30 = !DILocation(line: 0, scope: !24) !31 = !DILocation(line: 7, column: 6, scope: !32) !32 = distinct !DILexicalBlock(scope: !24, file: !3, line: 7, column: 6) !33 = !DILocation(line: 7, column: 8, scope: !32) !34 = !DILocation(line: 7, column: 6, scope: !24) !35 = !DILocation(line: 7, column: 26, scope: !32) !36 = !DILocation(line: 7, column: 22, scope: !37) !37 = !DILexicalBlockFile(scope: !32, file: !3, discriminator: 186646575) !38 = !DILocation(line: 7, column: 14, scope: !32) !39 = !DILocation(line: 8, column: 19, scope: !32) !40 = !DILocation(line: 8, column: 21, scope: !32) !41 = !DILocation(line: 8, column: 15, scope: !42) !42 = !DILexicalBlockFile(scope: !32, file: !3, discriminator: 186646583) !43 = !DILocation(line: 8, column: 8, scope: !32) !44 = !DILocation(line: 0, scope: !32) !45 = !DILocation(line: 9, column: 1, scope: !24) !46 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 11, type: !47, scopeLine: 11, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !49) !47 = !DISubroutineType(types: !48) !48 = !{!6} !49 = !{!50} !50 = !DILocalVariable(name: "i", scope: !51, file: !3, line: 14, type: !6) !51 = distinct !DILexicalBlock(scope: !46, file: !3, line: 14, column: 3) !52 = !DILocation(line: 12, column: 6, scope: !53) !53 = distinct !DILexicalBlock(scope: !46, file: !3, line: 12, column: 6) !54 = !{!55, !55, i64 0} !55 = !{!"int", !56, i64 0} !56 = !{!"omnipotent char", !57, i64 0} !57 = !{!"Simple C/C++ TBAA"} !58 = !DILocation(line: 12, column: 8, scope: !53) !59 = !DILocation(line: 12, column: 6, scope: !46) !60 = !DILocation(line: 13, column: 5, scope: !53) !61 = !DILocation(line: 14, column: 11, scope: !51) !62 = !DILocation(line: 0, scope: !51) !63 = !DILocation(line: 14, column: 7, scope: !51) !64 = !DILocation(line: 14, scope: !51) !65 = !DILocation(line: 14, column: 18, scope: !66) !66 = distinct !DILexicalBlock(scope: !51, file: !3, line: 14, column: 3) !67 = !DILocation(line: 14, column: 20, scope: !66) !68 = !DILocation(line: 14, column: 3, scope: !51) !69 = !DILocation(line: 15, column: 15, scope: !70) !70 = distinct !DILexicalBlock(scope: !66, file: !3, line: 14, column: 40) !71 = !DILocation(line: 15, column: 18, scope: !70) !72 = !DILocation(line: 15, column: 11, scope: !73) !73 = !DILexicalBlockFile(scope: !70, file: !3, discriminator: 186646639) !74 = !DILocation(line: 15, column: 8, scope: !70) !75 = !DILocation(line: 16, column: 15, scope: !70) !76 = !DILocation(line: 16, column: 11, scope: !77) !77 = !DILexicalBlockFile(scope: !70, file: !3, discriminator: 186646647) !78 = !DILocation(line: 16, column: 8, scope: !70) !79 = !DILocation(line: 17, column: 9, scope: !70) !80 = !DILocation(line: 18, column: 8, scope: !81) !81 = distinct !DILexicalBlock(scope: !70, file: !3, line: 17, column: 9) !82 = !DILocation(line: 19, column: 15, scope: !70) !83 = !DILocation(line: 19, column: 18, scope: !70) !84 = !DILocation(line: 19, column: 11, scope: !85) !85 = !DILexicalBlockFile(scope: !70, file: !3, discriminator: 186646655) !86 = !DILocation(line: 19, column: 8, scope: !70) !87 = !DILocation(line: 20, column: 15, scope: !70) !88 = !DILocation(line: 20, column: 11, scope: !89) !89 = !DILexicalBlockFile(scope: !70, file: !3, discriminator: 186646663) !90 = !DILocation(line: 20, column: 8, scope: !70) !91 = !DILocation(line: 14, column: 36, scope: !66) !92 = !DILocation(line: 14, column: 3, scope: !66) !93 = distinct !{!93, !68, !94, !95} !94 = !DILocation(line: 21, column: 3, scope: !51) !95 = !{!"llvm.loop.mustprogress"} !96 = !DILocation(line: 0, scope: !46) !97 = !DILocation(line: 22, column: 1, scope: !46)