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| author | Jim Grosbach <grosbach@apple.com> | 2012-07-25 17:02:47 +0000 |
|---|---|---|
| committer | Jim Grosbach <grosbach@apple.com> | 2012-07-25 17:02:47 +0000 |
| commit | 242204784bae63da503c2f509a38c532085f0eb1 (patch) | |
| tree | b60f26130a733857df37d5dd46b25aaf7da3fbab /lib | |
| parent | eba2bbb58cafcb1ec0fa50d5e8a1c6a8cac2f780 (diff) | |
| download | llvm-242204784bae63da503c2f509a38c532085f0eb1.tar.gz llvm-242204784bae63da503c2f509a38c532085f0eb1.tar.bz2 llvm-242204784bae63da503c2f509a38c532085f0eb1.tar.xz | |
ARM: Don't assume an SDNode is a constant.
Before accessing a node as a ConstandSDNode, make sure it actually is one.
No testcase of non-trivial size.
rdar://11948669
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160735 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 04370c095c..9d8b7dff10 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -4271,6 +4271,10 @@ SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op, // Record this extraction against the appropriate vector if possible... SDValue SourceVec = V.getOperand(0); + // If the element number isn't a constant, we can't effectively + // analyze what's going on. + if (!isa<ConstantSDNode>(V.getOperand(1))) + return SDValue(); unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue(); bool FoundSource = false; for (unsigned j = 0; j < SourceVecs.size(); ++j) { |