From 730b45694bd910efe0c5c38897854222f74c92bb Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 15 Apr 2006 23:48:05 +0000 Subject: [PATCH] Fix a crash when faced with a shuffle vector that has an undef in its mask. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27726 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/PPCISelLowering.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp index 8fa5f84db53..826ff4ea819 100644 --- a/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/lib/Target/PowerPC/PPCISelLowering.cpp @@ -1116,7 +1116,11 @@ static SDOperand LowerVECTOR_SHUFFLE(SDOperand Op, SelectionDAG &DAG) { std::vector ResultMask; for (unsigned i = 0, e = PermMask.getNumOperands(); i != e; ++i) { - unsigned SrcElt =cast(PermMask.getOperand(i))->getValue(); + unsigned SrcElt; + if (PermMask.getOperand(i).getOpcode() == ISD::UNDEF) + SrcElt = 0; + else + SrcElt = cast(PermMask.getOperand(i))->getValue(); for (unsigned j = 0; j != BytesPerElement; ++j) ResultMask.push_back(DAG.getConstant(SrcElt*BytesPerElement+j,