Don't create SEXTLOAD/ZEXTLOAD instructions that the target doesn't support
if after legalize. This fixes IA64 failures.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24725 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 031bf61..ddd8549 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -1550,7 +1550,8 @@
return DAG.getNode(ISD::SIGN_EXTEND_INREG, VT, N0.getOperand(0),
DAG.getValueType(N0.getValueType()));
// fold (sext (load x)) -> (sext (truncate (sextload x)))
- if (N0.getOpcode() == ISD::LOAD && N0.hasOneUse()) {
+ if (N0.getOpcode() == ISD::LOAD && N0.hasOneUse() &&
+ (!AfterLegalize||TLI.isOperationLegal(ISD::SEXTLOAD, N0.getValueType()))){
SDOperand ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, N0.getOperand(0),
N0.getOperand(1), N0.getOperand(2),
N0.getValueType());
@@ -1592,7 +1593,8 @@
(!AfterLegalize || TLI.isOperationLegal(ISD::AND, N0.getValueType())))
return DAG.getZeroExtendInReg(N0.getOperand(0), N0.getValueType());
// fold (zext (load x)) -> (zext (truncate (zextload x)))
- if (N0.getOpcode() == ISD::LOAD && N0.hasOneUse()) {
+ if (N0.getOpcode() == ISD::LOAD && N0.hasOneUse() &&
+ (!AfterLegalize||TLI.isOperationLegal(ISD::ZEXTLOAD, N0.getValueType()))){
SDOperand ExtLoad = DAG.getExtLoad(ISD::ZEXTLOAD, VT, N0.getOperand(0),
N0.getOperand(1), N0.getOperand(2),
N0.getValueType());