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9cb3ba300f
ScalarEvolution::getSignedRange uses ComputeNumSignBits from ValueTracking on ashr instructions. ComputeNumSignBits can return zero, but this case was not handled correctly by the code in getSignedRange which was calling: APInt::getSignedMinValue(BitWidth).ashr(NS - 1) with NS = 0, resulting in an assertion failure in APInt::ashr. Now, we just return the conservative result (as with NS == 1). Another bug found by llvm-stress. llvm-svn: 185955
19 lines
545 B
LLVM
19 lines
545 B
LLVM
; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %s
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target triple = "powerpc64-unknown-linux-gnu"
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define void @autogen_SD30723(i32) {
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BB:
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br label %CF80
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CF80: ; preds = %CF80, %BB
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%B = ashr i32 %0, -1
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br i1 undef, label %CF80, label %CF84
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CF84: ; preds = %CF84, %CF80
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%Cmp62 = icmp sge i32 undef, %B
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br i1 %Cmp62, label %CF84, label %CF85
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CF85: ; preds = %CF85, %CF84
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br label %CF85
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}
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