| |
| ; RUN: llvm-profdata merge %S/Inputs/misexpect-branch.proftext -o %t.profdata |
| |
| |
| ; RUN: opt < %s -lower-expect -pgo-instr-use -pgo-test-profile-file=%t.profdata -S -pgo-warn-misexpect 2>&1 | FileCheck %s --check-prefix=WARNING |
| ; RUN: opt < %s -lower-expect -pgo-instr-use -pgo-test-profile-file=%t.profdata -S -pass-remarks=misexpect 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: opt < %s -lower-expect -pgo-instr-use -pgo-test-profile-file=%t.profdata -S -pgo-warn-misexpect -pass-remarks=misexpect 2>&1 | FileCheck %s --check-prefix=BOTH |
| ; RUN: opt < %s -lower-expect -pgo-instr-use -pgo-test-profile-file=%t.profdata -S 2>&1 | FileCheck %s --check-prefix=DISABLED |
| |
| ; New PM |
| ; RUN: opt < %s -passes="function(lower-expect),pgo-instr-use" -pgo-test-profile-file=%t.profdata -pgo-warn-misexpect -S 2>&1 | FileCheck %s --check-prefix=WARNING |
| ; RUN: opt < %s -passes="function(lower-expect),pgo-instr-use" -pgo-test-profile-file=%t.profdata -pass-remarks=misexpect -S 2>&1 | FileCheck %s --check-prefix=REMARK |
| ; RUN: opt < %s -passes="function(lower-expect),pgo-instr-use" -pgo-test-profile-file=%t.profdata -pgo-warn-misexpect -pass-remarks=misexpect -S 2>&1 | FileCheck %s --check-prefix=BOTH |
| ; RUN: opt < %s -passes="function(lower-expect),pgo-instr-use" -pgo-test-profile-file=%t.profdata -S 2>&1 | FileCheck %s --check-prefix=DISABLED |
| |
| |
| |
| ; WARNING-DAG: warning: misexpect-branch.c:22:0: 19.98% |
| ; WARNING-NOT: remark: misexpect-branch.c:22:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| ; REMARK-NOT: warning: misexpect-branch.c:22:0: 19.98% |
| ; REMARK-DAG: remark: misexpect-branch.c:22:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| ; BOTH-DAG: warning: misexpect-branch.c:22:0: 19.98% |
| ; BOTH-DAG: remark: misexpect-branch.c:22:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| ; DISABLED-NOT: warning: misexpect-branch.c:22:0: 19.98% |
| ; DISABLED-NOT: remark: misexpect-branch.c:22:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| ; CHECK-DAG: !{!"misexpect", i64 1, i64 2000, i64 1} |
| |
| |
| |
| ; ModuleID = 'misexpect-branch.c' |
| source_filename = "misexpect-branch.c" |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @inner_loop = constant i32 100, align 4 |
| @outer_loop = constant i32 2000, align 4 |
| |
| ; Function Attrs: nounwind |
| define i32 @bar() #0 !dbg !6 { |
| entry: |
| %rando = alloca i32, align 4 |
| %x = alloca i32, align 4 |
| %0 = bitcast i32* %rando to i8*, !dbg !9 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* %0) #4, !dbg !9 |
| %call = call i32 (...) @buzz(), !dbg !9 |
| store i32 %call, i32* %rando, align 4, !dbg !9, !tbaa !10 |
| %1 = bitcast i32* %x to i8*, !dbg !14 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* %1) #4, !dbg !14 |
| store i32 0, i32* %x, align 4, !dbg !14, !tbaa !10 |
| %2 = load i32, i32* %rando, align 4, !dbg !15, !tbaa !10 |
| %rem = srem i32 %2, 200000, !dbg !15 |
| %cmp = icmp eq i32 %rem, 0, !dbg !15 |
| %lnot = xor i1 %cmp, true, !dbg !15 |
| %lnot1 = xor i1 %lnot, true, !dbg !15 |
| %lnot.ext = zext i1 %lnot1 to i32, !dbg !15 |
| %conv = sext i32 %lnot.ext to i64, !dbg !15 |
| %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1), !dbg !15 |
| %tobool = icmp ne i64 %expval, 0, !dbg !15 |
| br i1 %tobool, label %if.then, label %if.else, !dbg !15 |
| |
| if.then: ; preds = %entry |
| %3 = load i32, i32* %rando, align 4, !dbg !16, !tbaa !10 |
| %call2 = call i32 @baz(i32 %3), !dbg !16 |
| store i32 %call2, i32* %x, align 4, !dbg !16, !tbaa !10 |
| br label %if.end, !dbg !17 |
| |
| if.else: ; preds = %entry |
| %call3 = call i32 @foo(i32 50), !dbg !18 |
| store i32 %call3, i32* %x, align 4, !dbg !18, !tbaa !10 |
| br label %if.end |
| |
| if.end: ; preds = %if.else, %if.then |
| %4 = load i32, i32* %x, align 4, !dbg !19, !tbaa !10 |
| %5 = bitcast i32* %x to i8*, !dbg !20 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* %5) #4, !dbg !20 |
| %6 = bitcast i32* %rando to i8*, !dbg !20 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* %6) #4, !dbg !20 |
| ret i32 %4, !dbg !19 |
| } |
| |
| ; Function Attrs: argmemonly nounwind willreturn |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1 |
| |
| declare i32 @buzz(...) #2 |
| |
| ; Function Attrs: nounwind readnone willreturn |
| declare i64 @llvm.expect.i64(i64, i64) #3 |
| |
| declare i32 @baz(i32) #2 |
| |
| declare i32 @foo(i32) #2 |
| |
| ; Function Attrs: argmemonly nounwind willreturn |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1 |
| |
| attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { argmemonly nounwind willreturn } |
| attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #3 = { nounwind readnone willreturn } |
| attributes #4 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4} |
| !llvm.ident = !{!5} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (trunk c20270bfffc9d6965219de339d66c61e9fe7d82d)", isOptimized: true, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "<stdin>", directory: ".") |
| !2 = !{} |
| !3 = !{i32 2, !"Debug Info Version", i32 3} |
| !4 = !{i32 1, !"wchar_size", i32 4} |
| !5 = !{!"clang version 10.0.0 (trunk c20270bfffc9d6965219de339d66c61e9fe7d82d)"} |
| !6 = distinct !DISubprogram(name: "bar", scope: !7, file: !7, line: 19, type: !8, scopeLine: 19, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) |
| !7 = !DIFile(filename: "misexpect-branch.c", directory: ".") |
| !8 = !DISubroutineType(types: !2) |
| !9 = !DILocation(line: 20, scope: !6) |
| !10 = !{!11, !11, i64 0} |
| !11 = !{!"int", !12, i64 0} |
| !12 = !{!"omnipotent char", !13, i64 0} |
| !13 = !{!"Simple C/C++ TBAA"} |
| !14 = !DILocation(line: 21, scope: !6) |
| !15 = !DILocation(line: 22, scope: !6) |
| !16 = !DILocation(line: 23, scope: !6) |
| !17 = !DILocation(line: 24, scope: !6) |
| !18 = !DILocation(line: 25, scope: !6) |
| !19 = !DILocation(line: 27, scope: !6) |
| !20 = !DILocation(line: 28, scope: !6) |
