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| author | Eric Christopher <echristo@apple.com> | 2010-11-03 20:44:42 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@apple.com> | 2010-11-03 20:44:42 +0000 |
| commit | d81f17acb4f2d755759a4d8a83a71a98ade0edd3 (patch) | |
| tree | d13ea2947493e4fcf4e6cdcfa1c645d499deb388 /lib/CodeGen/SelectionDAG/DAGCombiner.cpp | |
| parent | 964bc25e5a03be208427ce2ebadb22a42681ef9c (diff) | |
| download | external_llvm-d81f17acb4f2d755759a4d8a83a71a98ade0edd3.zip external_llvm-d81f17acb4f2d755759a4d8a83a71a98ade0edd3.tar.gz external_llvm-d81f17acb4f2d755759a4d8a83a71a98ade0edd3.tar.bz2 | |
Just return undef for invalid masks or elts, and since we're doing that,
just do it earlier too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118195 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index c31598e..7154d9d 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -6242,6 +6242,10 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) { if (!LN0 || !LN0->hasOneUse() || LN0->isVolatile()) return SDValue(); + // If Idx was -1 above, Elt is going to be -1, so just return undef. + if (Elt == -1) + return DAG.getUNDEF(LN0->getBasePtr().getValueType()); + unsigned Align = LN0->getAlignment(); if (NewLoad) { // Check the resultant load doesn't need a higher alignment than the @@ -6257,11 +6261,8 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) { SDValue NewPtr = LN0->getBasePtr(); unsigned PtrOff = 0; - // If Idx was -1 above, Elt is going to be -1, so just use undef as our - // new pointer. - if (Elt == -1) { - NewPtr = DAG.getUNDEF(NewPtr.getValueType()); - } else if (Elt) { + + if (Elt) { PtrOff = LVT.getSizeInBits() * Elt / 8; EVT PtrType = NewPtr.getValueType(); if (TLI.isBigEndian()) |