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f8ab3ef1eb
FindIDom() can fail in two different ways - it can either return nullptr or the block itself, depending on the circumstances. Some users of FindIDom() check one error condition, while others check the other. Change it to always return nullptr on failure. This fixes PR26004. Differential Revision: http://reviews.llvm.org/D15847 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256955 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
1.1 KiB
LLVM
33 lines
1.1 KiB
LLVM
; RUN: llc %s -o - -enable-shrink-wrap=true | FileCheck %s
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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target triple = "i686-pc-linux"
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@b = global i32 1, align 4
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@a = common global i32 0, align 4
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declare void @fn1() #0
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; CHECK-LABEL: fn2:
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define void @fn2() #0 {
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entry:
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%0 = load i32, i32* @b, align 4
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%tobool = icmp eq i32 %0, 0
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br i1 %tobool, label %if.end, label %lbl
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lbl: ; preds = %if.end, %entry
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store i32 0, i32* @b, align 4
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br label %if.end
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if.end: ; preds = %entry, %lbl
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tail call void @fn1()
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%1 = load i32, i32* @b, align 4
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%tobool1 = icmp eq i32 %1, 0
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br i1 %tobool1, label %if.end3, label %lbl
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if.end3: ; preds = %if.end
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ret void
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}
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attributes #0 = { norecurse nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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