Fix a dagcombine optimization. The optimization attempts to optimize a bitcast of fneg to integers
by xoring the high-bit. This fails if the source operand is a vector because we need to negate
each of the elements in the vector.
Fix rdar://12281066 PR13813.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163802 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index cd0259b..186d09a 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -5441,7 +5441,8 @@
// This often reduces constant pool loads.
if (((N0.getOpcode() == ISD::FNEG && !TLI.isFNegFree(VT)) ||
(N0.getOpcode() == ISD::FABS && !TLI.isFAbsFree(VT))) &&
- N0.getNode()->hasOneUse() && VT.isInteger() && !VT.isVector()) {
+ N0.getNode()->hasOneUse() && VT.isInteger() &&
+ !VT.isVector() && !N0.getValueType().isVector()) {
SDValue NewConv = DAG.getNode(ISD::BITCAST, N0.getDebugLoc(), VT,
N0.getOperand(0));
AddToWorkList(NewConv.getNode());