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Appease AArch64ISelLowering.cpp miscompiled by g++-4.7.2.

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I will revert this when 4.7.3 is ready.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232561 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
NAKAMURA Takumi 2015-03-17 22:55:01 +00:00
parent ba5a585242
commit f99fa6d5fd
1 changed files with 6 additions and 0 deletions
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6
lib/Target/AArch64/AArch64ISelLowering.cpp
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@ -7201,6 +7201,12 @@ static SDValue performConcatVectorsCombine(SDNode *N,
(N00VT == MVT::v2i64 || N00VT == MVT::v4i32) &&
N00VT.getScalarSizeInBits() == 4 * VT.getScalarSizeInBits()) {
MVT MidVT = (N00VT == MVT::v2i64 ? MVT::v2i32 : MVT::v4i16);
#if defined(__GNUC__)
#if __GNUC__ == 4 && __GNUC_MINOR__ == 7 && __GNUC_PATCHLEVEL__ == 2
// FIXME: g++-4.7.2 might miscompile PerformDAGCombine().
asm volatile("":::"memory");
#endif
#endif
MVT ConcatMidVT = MVT::getVectorVT(MidVT.getVectorElementType(),
MidVT.getVectorNumElements() * 2);
return DAG.getNode(