diff options
| author | Mon P Wang <wangmp@apple.com> | 2009-01-18 06:43:40 +0000 |
|---|---|---|
| committer | Mon P Wang <wangmp@apple.com> | 2009-01-18 06:43:40 +0000 |
| commit | e3bc6ae92a17c28824fb4b6cf606d8ab07cae974 (patch) | |
| tree | 3414f3f84314a110ededd94efa02182bb3bb237a /lib/CodeGen | |
| parent | b3ec5ba9cd145cfed8546559592879b3758b7866 (diff) | |
| download | external_llvm-e3bc6ae92a17c28824fb4b6cf606d8ab07cae974.zip external_llvm-e3bc6ae92a17c28824fb4b6cf606d8ab07cae974.tar.gz external_llvm-e3bc6ae92a17c28824fb4b6cf606d8ab07cae974.tar.bz2 | |
Simplify extract element based on comments from Duncan Sands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62459 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 230079b..67a419a 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -4880,14 +4880,9 @@ SDValue DAGCombiner::visitINSERT_VECTOR_ELT(SDNode *N) { SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) { // (vextract (scalar_to_vector val, 0) -> val SDValue InVec = N->getOperand(0); - SDValue EltNo = N->getOperand(1); - if (isa<ConstantSDNode>(EltNo)) { - unsigned Elt = cast<ConstantSDNode>(EltNo)->getZExtValue(); - if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR && Elt == 0) { - return InVec.getOperand(0); - } - } + if (InVec.getOpcode() == ISD::SCALAR_TO_VECTOR) + return InVec.getOperand(0); // Perform only after legalization to ensure build_vector / vector_shuffle // optimizations have already been done. @@ -4896,6 +4891,7 @@ SDValue DAGCombiner::visitEXTRACT_VECTOR_ELT(SDNode *N) { // (vextract (v4f32 load $addr), c) -> (f32 load $addr+c*size) // (vextract (v4f32 s2v (f32 load $addr)), c) -> (f32 load $addr+c*size) // (vextract (v4f32 shuffle (load $addr), <1,u,u,u>), 0) -> (f32 load $addr) + SDValue EltNo = N->getOperand(1); if (isa<ConstantSDNode>(EltNo)) { unsigned Elt = cast<ConstantSDNode>(EltNo)->getZExtValue(); |