From 9aaa02a1d26a0969e95b285ea1190920a5bb37db Mon Sep 17 00:00:00 2001 From: Eric Christopher Date: Wed, 1 Jun 2011 19:55:10 +0000 Subject: Allow bitcasts between valid types of the same size and vector types if the vector type is legal. Fixes rdar://9306086 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132420 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp') diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 8edbdf07cc..9a656a7c83 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -282,6 +282,12 @@ static SDValue getCopyFromPartsVector(SelectionDAG &DAG, DebugLoc DL, // Vector/Vector bitcast. return DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); } + + // Trivial bitcast if the types are the same size and the destination + // vector type is legal. + if (PartVT.getSizeInBits() == ValueVT.getSizeInBits() && + TLI.isTypeLegal(ValueVT)) + return DAG.getNode(ISD::BITCAST, DL, ValueVT, Val); assert(ValueVT.getVectorElementType() == PartVT && ValueVT.getVectorNumElements() == 1 && -- cgit v1.2.3-70-g09d2