commit 8a7f7426eeb18fef58c3471db23fc829b67bc350
author Dan Gohman <gohman@apple.com> Fri Jun 18 01:05:21 2010 +0000
committer Dan Gohman <gohman@apple.com> Fri Jun 18 01:05:21 2010 +0000
tree c09b3eb1b448651efb494764ea9c9a6eeb843ed7
parent 4f46e14b8ab3861a8dbea14ed70cb9527ae24a06

Fold the ShrinkDemandedOps pass into the regular DAGCombiner pass,
which is faster, simpler, and less surprising.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106263 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 9907066..f5e0b22 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -9641,8 +9641,10 @@
   if (ShAmt1.getOpcode() == ISD::SUB) {
     SDValue Sum = ShAmt1.getOperand(0);
     if (ConstantSDNode *SumC = dyn_cast<ConstantSDNode>(Sum)) {
-      if (SumC->getSExtValue() == Bits &&
-          ShAmt1.getOperand(1) == ShAmt0)
+      SDValue ShAmt1Op1 = ShAmt1.getOperand(1);
+      if (ShAmt1Op1.getNode()->getOpcode() == ISD::TRUNCATE)
+        ShAmt1Op1 = ShAmt1Op1.getOperand(0);
+      if (SumC->getSExtValue() == Bits && ShAmt1Op1 == ShAmt0)
         return DAG.getNode(Opc, DL, VT,
                            Op0, Op1,
                            DAG.getNode(ISD::TRUNCATE, DL,