Do not create ZEXTLOAD's unless we are before legalize or the operation is
legal.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27402 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index c982e5b..a5925ad 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -1193,7 +1193,8 @@
LoadedVT = N0.getOpcode() == ISD::LOAD ? VT :
cast<VTSDNode>(N0.getOperand(3))->getVT();
- if (EVT != MVT::Other && LoadedVT > EVT) {
+ if (EVT != MVT::Other && LoadedVT > EVT &&
+ (!AfterLegalize || TLI.isOperationLegal(ISD::ZEXTLOAD, EVT))) {
MVT::ValueType PtrType = N0.getOperand(1).getValueType();
// For big endian targets, we need to add an offset to the pointer to load
// the correct bytes. For little endian systems, we merely need to read