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Insert a sanity check on the combining of x86 truncing-store nodes. This comes to replace the problematic check that was removed in r139995.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140246 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2011-09-21 08:45:10 +00:00
parent b5b8d20ddd
commit 9c6cdf4c1c
1 changed files with 3 additions and 0 deletions
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lib/Target/X86/X86ISelLowering.cpp
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@ -13563,6 +13563,9 @@ static SDValue PerformSTORECombine(SDNode *N, SelectionDAG &DAG,
// From, To sizes and ElemCount must be pow of two
if (!isPowerOf2_32(NumElems * FromSz * ToSz)) return SDValue();
// We are going to use the original vector elt for storing.
// accumulated smaller vector elements must be a multiple of the store size.
if (0 != (NumElems * FromSz) % ToSz) return SDValue();
unsigned SizeRatio = FromSz / ToSz;