derek.holloway
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78 lines
2.5 KiB
LLVM
78 lines
2.5 KiB
LLVM
; Test misexpect doesn't issue diagnostics when a branch is marked unpredictable
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; RUN: llvm-profdata merge %S/Inputs/misexpect-branch-correct.proftext -o %t.profdata
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; 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
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; CHECK-NOT: warning: {{.*}}
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; CHECK-NOT: remark: {{.*}}
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; ModuleID = 'misexpect-branch-unpredictable.c'
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source_filename = "clang/test/Profile/misexpect-branch-unpredictable.c"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@inner_loop = constant i32 100, align 4
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@outer_loop = constant i32 2000, align 4
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; Function Attrs: nounwind
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define i32 @bar() {
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entry:
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%rando = alloca i32, align 4
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%x = alloca i32, align 4
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call void @llvm.lifetime.start.p0(ptr %rando)
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%call = call i32 (...) @buzz()
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store i32 %call, ptr %rando, align 4, !tbaa !2
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call void @llvm.lifetime.start.p0(ptr %x)
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store i32 0, ptr %x, align 4, !tbaa !2
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%0 = load i32, ptr %rando, align 4, !tbaa !2
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%rem = srem i32 %0, 200000
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%cmp = icmp eq i32 %rem, 0
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%lnot = xor i1 %cmp, true
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%lnot1 = xor i1 %lnot, true
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%lnot.ext = zext i1 %lnot1 to i32
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%conv = sext i32 %lnot.ext to i64
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%tobool = icmp ne i64 %conv, 0
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br i1 %tobool, label %if.then, label %if.else, !unpredictable !6
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if.then: ; preds = %entry
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%1 = load i32, ptr %rando, align 4, !tbaa !2
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%call2 = call i32 @baz(i32 %1)
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store i32 %call2, ptr %x, align 4, !tbaa !2
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br label %if.end
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if.else: ; preds = %entry
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%call3 = call i32 @foo(i32 50)
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store i32 %call3, ptr %x, align 4, !tbaa !2
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%2 = load i32, ptr %x, align 4, !tbaa !2
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call void @llvm.lifetime.end.p0(ptr %x)
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call void @llvm.lifetime.end.p0(ptr %rando)
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ret i32 %2
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}
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.lifetime.start.p0(ptr nocapture)
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declare i32 @buzz(...)
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declare i32 @baz(i32)
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declare i32 @foo(i32)
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.lifetime.end.p0(ptr nocapture)
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!llvm.module.flags = !{!0}
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!llvm.ident = !{!1}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{!"Fuchsia clang version 10.0.0 (153b453014c94291c8c6cf6320b2f46df40f26f3) (based on LLVM 10.0.0svn)"}
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!2 = !{!3, !3, i64 0}
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!3 = !{!"int", !4, i64 0}
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!4 = !{!"omnipotent char", !5, i64 0}
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!5 = !{!"Simple C/C++ TBAA"}
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!6 = !{}
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