| ; Test that misexpect diagnostics handle stripped debug info gracefully |
| |
| ; RUN: llvm-profdata merge %S/Inputs/misexpect-branch.proftext -o %t.profdata |
| |
| ; 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: <unknown>:0:0: 19.98% |
| ; WARNING-NOT: remark: <unknown>:0:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| ; REMARK-NOT: warning: <unknown>:0:0: 19.98% |
| ; REMARK-DAG: remark: <unknown>:0:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| ; BOTH-DAG: warning: <unknown>:0:0: 19.98% |
| ; BOTH-DAG: remark: <unknown>:0:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| ; DISABLED-NOT: warning: <unknown>:0:0: 19.98% |
| ; DISABLED-NOT: remark: <unknown>:0:0: Potential performance regression from use of the llvm.expect intrinsic: Annotation was correct on 19.98% (399668 / 2000000) of profiled executions. |
| |
| |
| ; 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 { |
| entry: |
| %rando = alloca i32, align 4 |
| %x = alloca i32, align 4 |
| call void @llvm.lifetime.start.p0(i64 4, ptr %rando) #4 |
| %call = call i32 (...) @buzz() |
| store i32 %call, ptr %rando, align 4, !tbaa !3 |
| call void @llvm.lifetime.start.p0(i64 4, ptr %x) #4 |
| store i32 0, ptr %x, align 4, !tbaa !3 |
| %0 = load i32, ptr %rando, align 4, !tbaa !3 |
| %rem = srem i32 %0, 200000 |
| %cmp = icmp eq i32 %rem, 0 |
| %lnot = xor i1 %cmp, true |
| %lnot1 = xor i1 %lnot, true |
| %lnot.ext = zext i1 %lnot1 to i32 |
| %conv = sext i32 %lnot.ext to i64 |
| %expval = call i64 @llvm.expect.i64(i64 %conv, i64 1) |
| %tobool = icmp ne i64 %expval, 0 |
| br i1 %tobool, label %if.then, label %if.else |
| |
| if.then: ; preds = %entry |
| %1 = load i32, ptr %rando, align 4, !tbaa !3 |
| %call2 = call i32 @baz(i32 %1) |
| store i32 %call2, ptr %x, align 4, !tbaa !3 |
| br label %if.end |
| |
| if.else: ; preds = %entry |
| %call3 = call i32 @foo(i32 50) |
| store i32 %call3, ptr %x, align 4, !tbaa !3 |
| br label %if.end |
| |
| if.end: ; preds = %if.else, %if.then |
| %2 = load i32, ptr %x, align 4, !tbaa !3 |
| call void @llvm.lifetime.end.p0(i64 4, ptr %x) #4 |
| call void @llvm.lifetime.end.p0(i64 4, ptr %rando) #4 |
| ret i32 %2 |
| } |
| |
| ; Function Attrs: argmemonly nounwind willreturn |
| declare void @llvm.lifetime.start.p0(i64 immarg, ptr 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.p0(i64 immarg, ptr 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.module.flags = !{!0, !1} |
| !llvm.ident = !{!2} |
| |
| !0 = !{i32 2, !"Debug Info Version", i32 3} |
| !1 = !{i32 1, !"wchar_size", i32 4} |
| !2 = !{!"clang version 10.0.0 (trunk c20270bfffc9d6965219de339d66c61e9fe7d82d)"} |
| !3 = !{!4, !4, i64 0} |
| !4 = !{!"int", !5, i64 0} |
| !5 = !{!"omnipotent char", !6, i64 0} |
| !6 = !{!"Simple C/C++ TBAA"} |