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Fix a crash in APInt::lshr when shiftAmt > BitWidth.

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Patch by James Benton <jbenton@vmware.com>.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158213 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier 2012-06-08 18:04:52 +00:00
parent c36d033c08
commit 28dd960cd1
2 changed files with 9 additions and 1 deletions
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2
lib/Support/APInt.cpp
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@ -1135,7 +1135,7 @@ APInt APInt::lshr(unsigned shiftAmt) const {
// If all the bits were shifted out, the result is 0. This avoids issues
// with shifting by the size of the integer type, which produces undefined
// results. We define these "undefined results" to always be 0.
if (shiftAmt == BitWidth)
if (shiftAmt >= BitWidth)
return APInt(BitWidth, 0);
// If none of the bits are shifted out, the result is *this. This avoids

8
test/CodeGen/Generic/2012-06-08-APIntCrash.ll Normal file
View File

@ -0,0 +1,8 @@
; RUN: llc < %s
define <8 x i32> @test1(<8 x i32>* %ptr)
{
%1 = load <8 x i32>* %ptr, align 32
%2 = and <8 x i32> %1, <i32 0, i32 0, i32 0, i32 -1, i32 0, i32 0, i32 0, i32 -1>
ret <8 x i32> %2;
}