commit 7667c0bac3cb46249fc14bb2f76111fb1625cdd6
author Chris Lattner <sabre@nondot.org> Sat May 19 00:46:51 2007 +0000
committer Chris Lattner <sabre@nondot.org> Sat May 19 00:46:51 2007 +0000
tree ce4b44ca0c2bd35f87f5e5b7c1269db579d0ad01
parent 2ad913b3428b634f46d6606a150c5d180b528197

same patch as the previous one, but the symmetric case


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37249 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/TargetLowering.cpp

diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index e5883f6..0ce8b3f 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -1808,7 +1808,7 @@
         if (DAG.isCommutativeBinOp(N1.getOpcode())) {
           return DAG.getSetCC(VT, N1.getOperand(0),
                           DAG.getConstant(0, N1.getValueType()), Cond);
-        } else {
+        } else if (N1.Val->hasOneUse()) {
           assert(N1.getOpcode() == ISD::SUB && "Unexpected operation!");
           // X == (Z-X)  --> X<<1 == Z
           SDOperand SH = DAG.getNode(ISD::SHL, N1.getValueType(), N0,