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| author | Craig Topper <craig.topper@intel.com> | 2018-03-01 22:32:25 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2018-03-01 22:32:25 +0000 |
| commit | e7ca6f5456a3b5a836a39b3c99e7d1d740883805 (patch) | |
| tree | 0bbc06f836bf0d6d56ee30ef7773902d9ef1bfba /llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | |
| parent | ca552b8d31e12d1068bbd3ac01f8b490712596f0 (diff) | |
| download | bcm5719-llvm-e7ca6f5456a3b5a836a39b3c99e7d1d740883805.tar.gz bcm5719-llvm-e7ca6f5456a3b5a836a39b3c99e7d1d740883805.zip | |
[DAGCombiner] When combining zero_extend of a truncate, only mask before extending for vectors.
Masking first, prevents the extend from being combine with loads. Its also interfering with some vXi1 extraction code.
Differential Revision: https://reviews.llvm.org/D42679
llvm-svn: 326500
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index b3a8eeb7c97..1810904b2c6 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -7832,7 +7832,7 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) { // Try to mask before the extension to avoid having to generate a larger mask, // possibly over several sub-vectors. - if (SrcVT.bitsLT(VT)) { + if (SrcVT.bitsLT(VT) && VT.isVector()) { if (!LegalOperations || (TLI.isOperationLegal(ISD::AND, SrcVT) && TLI.isOperationLegal(ISD::ZERO_EXTEND, VT))) { SDValue Op = N0.getOperand(0); |
