Fold the add (ptr, offset) into ptr[offset] only if the offset is small enough. movwi and moviw allow value of 5-bits only (i.e. 32).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73953 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PIC16/PIC16ISelLowering.cpp b/lib/Target/PIC16/PIC16ISelLowering.cpp
index f113a48..122af70 100644
--- a/lib/Target/PIC16/PIC16ISelLowering.cpp
+++ b/lib/Target/PIC16/PIC16ISelLowering.cpp
@@ -702,10 +702,12 @@
if (Ptr.getOpcode() == ISD::ADD) {
SDValue OperLeft = Ptr.getOperand(0);
SDValue OperRight = Ptr.getOperand(1);
- if (OperLeft.getOpcode() == ISD::Constant) {
+ if ((OperLeft.getOpcode() == ISD::Constant) &&
+ (dyn_cast<ConstantSDNode>(OperLeft)->getZExtValue() < 32 )) {
Offset = dyn_cast<ConstantSDNode>(OperLeft)->getZExtValue();
Ptr = OperRight;
- } else if (OperRight.getOpcode() == ISD::Constant) {
+ } else if ((OperRight.getOpcode() == ISD::Constant) &&
+ (dyn_cast<ConstantSDNode>(OperRight)->getZExtValue() < 32 )){
Offset = dyn_cast<ConstantSDNode>(OperRight)->getZExtValue();
Ptr = OperLeft;
}