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Fix visitTRUNCATE for legal i1 values

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This extract-and-trunc vector optimization cannot work for i1 values as
currently implemented, and so I'm disabling this for now for i1 values. In the
future, this can be fixed properly.

Soon I'll commit support for i1 CR bit tracking in the PowerPC backend, and
this will be covered by one of the existing regression tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202449 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel 2014-02-28 00:26:45 +00:00
parent 64e9de348b
commit 1a13499abf
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -5808,7 +5808,7 @@ SDValue DAGCombiner::visitTRUNCATE(SDNode *N) {
// creates this pattern) and before operation legalization after which
// we need to be more careful about the vector instructions that we generate.
if (N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT &&
LegalTypes && !LegalOperations && N0->hasOneUse()) {
LegalTypes && !LegalOperations && N0->hasOneUse() && VT != MVT::i1) {
EVT VecTy = N0.getOperand(0).getValueType();
EVT ExTy = N0.getValueType();