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| author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2016-12-03 23:03:26 +0000 |
|---|---|---|
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2016-12-03 23:03:26 +0000 |
| commit | 92fede361fa9881c518fadec89052a47567f4342 (patch) | |
| tree | a439357f7a858f3459be8cb511e7cda96a221bcf /llvm/lib/CodeGen | |
| parent | 66caac5735624f10a90921e43bb8c27eca58bee5 (diff) | |
| download | bcm5719-llvm-92fede361fa9881c518fadec89052a47567f4342.tar.gz bcm5719-llvm-92fede361fa9881c518fadec89052a47567f4342.zip | |
DAG: Fold out out of bounds insert_vector_elt
getNode already prevents formation of out of bounds constant
extract_vector_elts. Do the same for insert_vector_elt.
llvm-svn: 288603
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 71c83ae5c0f..fc0cdeebb63 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -4145,6 +4145,13 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT, break; case ISD::VECTOR_SHUFFLE: llvm_unreachable("should use getVectorShuffle constructor!"); + case ISD::INSERT_VECTOR_ELT: { + ConstantSDNode *N3C = dyn_cast<ConstantSDNode>(N3); + // INSERT_VECTOR_ELT into out-of-bounds element is an UNDEF + if (N3C && N3C->getZExtValue() >= N1.getValueType().getVectorNumElements()) + return getUNDEF(VT); + break; + } case ISD::INSERT_SUBVECTOR: { SDValue Index = N3; if (VT.isSimple() && N1.getValueType().isSimple() |
