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1; REQUIRES: x86_64-linux2; REQUIRES: asserts3; RUN: opt < %s -passes=sample-profile -sample-profile-file=%S/Inputs/non-probe-stale-profile-matching.prof --salvage-stale-profile -S --debug-only=sample-profile,sample-profile-matcher,sample-profile-impl -profile-isfs 2>&1 | FileCheck %s4 5; The profiled source code:6 7; volatile int x = 1;8; __attribute__((noinline)) int bar(int p) {9; return p;10; }11 12; __attribute__((always_inline)) int foo(int i, int p) {13; if (i % 10) return bar(p);14; else return bar(p + 1);15; }16 17; int main() {18; for (int i = 0; i < 1000 * 1000; i++) {19; x += foo(i, x);20; x += bar(x);21; x += foo(i, x);22; x += bar(x);23; }24; }25 26; The source code for the current build:27 28; volatile int x = 1;29; __attribute__((noinline)) int bar(int p) {30; return p;31; }32 33; __attribute__((always_inline)) int foo(int i, int p) {34; if (i % 10) return bar(p);35; else return bar(p + 1);36; }37 38; int main() {39; if (x == 0) // code change40; return 0; // code change41; for (int i = 0; i < 1000 * 1000; i++) {42; x += foo(i, x);43; x += bar(x);44; if (i < 0) // code change45; return 0; // code change46; x += foo(i, x);47; x += bar(x);48; }49; }50 51; CHECK: Run stale profile matching for main52; CHECK: Callsite with callee:foo is matched from 4 to 253; CHECK: Callsite with callee:bar is matched from 5 to 354; CHECK: Callsite with callee:foo is matched from 8 to 455; CHECK: Callsite with callee:bar is matched from 9 to 556 57; CHECK: Run stale profile matching for foo58; CHECK: Callsite with callee:bar is matched from 1.15 to 1.1559; CHECK: Callsite with callee:bar is matched from 2 to 260 61; CHECK: Run stale profile matching for bar62 63target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"64target triple = "x86_64-unknown-linux-gnu"65 66@x = dso_local global i32 1, align 467 68; Function Attrs: noinline nounwind uwtable69define dso_local i32 @bar(i32 noundef %p) #0 !dbg !9 {70entry:71 ret i32 %p, !dbg !1372}73 74; Function Attrs: alwaysinline nounwind uwtable75define dso_local i32 @foo(i32 noundef %i, i32 noundef %p) #1 !dbg !14 {76entry:77 %rem = srem i32 %i, 10, !dbg !1578 %tobool = icmp ne i32 %rem, 0, !dbg !1579 br i1 %tobool, label %if.then, label %if.else, !dbg !1680 81if.then: ; preds = %entry82 %call = call i32 @bar(i32 noundef %p), !dbg !1783 br label %return, !dbg !1984 85if.else: ; preds = %entry86 %add = add nsw i32 %p, 1, !dbg !2087 %call1 = call i32 @bar(i32 noundef %add), !dbg !2188 br label %return, !dbg !2289 90return: ; preds = %if.else, %if.then91 %retval.0 = phi i32 [ %call, %if.then ], [ %call1, %if.else ], !dbg !2392 ret i32 %retval.0, !dbg !2493}94 95; Function Attrs: nounwind uwtable96define dso_local i32 @main() #2 !dbg !25 {97entry:98 %0 = load volatile i32, ptr @x, align 4, !dbg !26, !tbaa !2799 %cmp = icmp eq i32 %0, 0, !dbg !31100 br i1 %cmp, label %if.then, label %if.end, !dbg !26101 102if.then: ; preds = %entry103 br label %for.end, !dbg !32104 105if.end: ; preds = %entry106 br label %for.cond, !dbg !33107 108for.cond: ; preds = %if.end6, %if.end109 %i.0 = phi i32 [ 0, %if.end ], [ %inc, %if.end6 ], !dbg !34110 %cmp1 = icmp slt i32 %i.0, 1000000, !dbg !35111 br i1 %cmp1, label %for.body, label %for.cond.cleanup, !dbg !37112 113for.cond.cleanup: ; preds = %for.cond114 br label %cleanup, !dbg !38115 116for.body: ; preds = %for.cond117 %1 = load volatile i32, ptr @x, align 4, !dbg !40, !tbaa !27118 %call = call i32 @foo(i32 noundef %i.0, i32 noundef %1), !dbg !41119 %2 = load volatile i32, ptr @x, align 4, !dbg !42, !tbaa !27120 %add = add nsw i32 %2, %call, !dbg !42121 store volatile i32 %add, ptr @x, align 4, !dbg !42, !tbaa !27122 %3 = load volatile i32, ptr @x, align 4, !dbg !43, !tbaa !27123 %call2 = call i32 @bar(i32 noundef %3), !dbg !44124 %4 = load volatile i32, ptr @x, align 4, !dbg !45, !tbaa !27125 %add3 = add nsw i32 %4, %call2, !dbg !45126 store volatile i32 %add3, ptr @x, align 4, !dbg !45, !tbaa !27127 br i1 false, label %if.then5, label %if.end6, !dbg !46128 129if.then5: ; preds = %for.body130 br label %cleanup, !dbg !47131 132if.end6: ; preds = %for.body133 %5 = load volatile i32, ptr @x, align 4, !dbg !48, !tbaa !27134 %call7 = call i32 @foo(i32 noundef %i.0, i32 noundef %5), !dbg !49135 %6 = load volatile i32, ptr @x, align 4, !dbg !50, !tbaa !27136 %add8 = add nsw i32 %6, %call7, !dbg !50137 store volatile i32 %add8, ptr @x, align 4, !dbg !50, !tbaa !27138 %7 = load volatile i32, ptr @x, align 4, !dbg !51, !tbaa !27139 %call9 = call i32 @bar(i32 noundef %7), !dbg !52140 %8 = load volatile i32, ptr @x, align 4, !dbg !53, !tbaa !27141 %add10 = add nsw i32 %8, %call9, !dbg !53142 store volatile i32 %add10, ptr @x, align 4, !dbg !53, !tbaa !27143 %inc = add nsw i32 %i.0, 1, !dbg !54144 br label %for.cond, !dbg !56, !llvm.loop !57145 146cleanup: ; preds = %if.then5, %for.cond.cleanup147 br label %for.end148 149for.end: ; preds = %cleanup, %if.then150 ret i32 0, !dbg !61151}152 153; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)154declare void @llvm.lifetime.start.p0(ptr nocapture) #3155 156; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)157declare void @llvm.lifetime.end.p0(ptr nocapture) #3158 159attributes #0 = { noinline nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }160attributes #1 = { alwaysinline nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }161attributes #2 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "use-sample-profile" }162attributes #3 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }163 164!llvm.dbg.cu = !{!0}165!llvm.module.flags = !{!2, !3, !4, !5, !6, !7}166!llvm.ident = !{!8}167 168!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 19.0.0git", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, splitDebugInlining: false, debugInfoForProfiling: true, nameTableKind: None)169!1 = !DIFile(filename: "test.c", directory: "path")170!2 = !{i32 7, !"Dwarf Version", i32 5}171!3 = !{i32 2, !"Debug Info Version", i32 3}172!4 = !{i32 1, !"wchar_size", i32 4}173!5 = !{i32 8, !"PIC Level", i32 2}174!6 = !{i32 7, !"PIE Level", i32 2}175!7 = !{i32 7, !"uwtable", i32 2}176!8 = !{!"clang version 19.0.0git"}177!9 = distinct !DISubprogram(name: "bar", scope: !10, file: !10, line: 2, type: !11, scopeLine: 2, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)178!10 = !DIFile(filename: "test.c", directory: "path")179!11 = !DISubroutineType(types: !12)180!12 = !{}181!13 = !DILocation(line: 3, column: 3, scope: !9)182!14 = distinct !DISubprogram(name: "foo", scope: !10, file: !10, line: 6, type: !11, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)183!15 = !DILocation(line: 7, column: 9, scope: !14)184!16 = !DILocation(line: 7, column: 7, scope: !14)185!17 = !DILocation(line: 7, column: 23, scope: !18)186!18 = !DILexicalBlockFile(scope: !14, file: !10, discriminator: 15)187!19 = !DILocation(line: 7, column: 15, scope: !18)188!20 = !DILocation(line: 8, column: 21, scope: !14)189!21 = !DILocation(line: 8, column: 15, scope: !14)190!22 = !DILocation(line: 8, column: 8, scope: !14)191!23 = !DILocation(line: 0, scope: !14)192!24 = !DILocation(line: 9, column: 1, scope: !14)193!25 = distinct !DISubprogram(name: "main", scope: !10, file: !10, line: 11, type: !11, scopeLine: 11, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)194!26 = !DILocation(line: 12, column: 7, scope: !25)195!27 = !{!28, !28, i64 0}196!28 = !{!"int", !29, i64 0}197!29 = !{!"omnipotent char", !30, i64 0}198!30 = !{!"Simple C/C++ TBAA"}199!31 = !DILocation(line: 12, column: 9, scope: !25)200!32 = !DILocation(line: 13, column: 5, scope: !25)201!33 = !DILocation(line: 14, column: 8, scope: !25)202!34 = !DILocation(line: 14, scope: !25)203!35 = !DILocation(line: 14, column: 21, scope: !36)204!36 = !DILexicalBlockFile(scope: !25, file: !10, discriminator: 15)205!37 = !DILocation(line: 14, column: 3, scope: !36)206!38 = !DILocation(line: 14, column: 3, scope: !39)207!39 = !DILexicalBlockFile(scope: !25, file: !10, discriminator: 4)208!40 = !DILocation(line: 15, column: 18, scope: !25)209!41 = !DILocation(line: 15, column: 11, scope: !25)210!42 = !DILocation(line: 15, column: 8, scope: !25)211!43 = !DILocation(line: 16, column: 15, scope: !25)212!44 = !DILocation(line: 16, column: 11, scope: !25)213!45 = !DILocation(line: 16, column: 8, scope: !25)214!46 = !DILocation(line: 17, column: 10, scope: !25)215!47 = !DILocation(line: 18, column: 8, scope: !25)216!48 = !DILocation(line: 19, column: 18, scope: !25)217!49 = !DILocation(line: 19, column: 11, scope: !25)218!50 = !DILocation(line: 19, column: 8, scope: !25)219!51 = !DILocation(line: 20, column: 15, scope: !25)220!52 = !DILocation(line: 20, column: 11, scope: !25)221!53 = !DILocation(line: 20, column: 8, scope: !25)222!54 = !DILocation(line: 14, column: 37, scope: !55)223!55 = !DILexicalBlockFile(scope: !25, file: !10, discriminator: 6)224!56 = !DILocation(line: 14, column: 3, scope: !55)225!57 = distinct !{!57, !58, !59, !60}226!58 = !DILocation(line: 14, column: 3, scope: !25)227!59 = !DILocation(line: 21, column: 3, scope: !25)228!60 = !{!"llvm.loop.mustprogress"}229!61 = !DILocation(line: 22, column: 1, scope: !25)230