[llvm-commits] [llvm] r73953 - /llvm/trunk/lib/Target/PIC16/PIC16ISelLowering.cpp

[Sanjiv Gupta]

Author: sgupta
Date: Tue Jun 23 02:10:19 2009
New Revision: 73953

URL: http://llvm.org/viewvc/llvm-project?rev=73953&view=rev
Log:
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).

Modified:
    llvm/trunk/lib/Target/PIC16/PIC16ISelLowering.cpp

Modified: llvm/trunk/lib/Target/PIC16/PIC16ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PIC16/PIC16ISelLowering.cpp?rev=73953&r1=73952&r2=73953&view=diff

==============================================================================
--- llvm/trunk/lib/Target/PIC16/PIC16ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/PIC16/PIC16ISelLowering.cpp Tue Jun 23 02:10:19 2009
@@ -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;
     }