From: Dan Gohman <gohman@apple.com>
Date: Tue, 13 Jan 2009 23:25:30 +0000 (+0000)
Subject: Don't use a BT instruction if the AND has multiple uses.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=286575c65c096e4d226b8a4c4a29a88d1c846b4f;p=oota-llvm.git

Don't use a BT instruction if the AND has multiple uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62195 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index fe665c351fa..a8bcfeafd39 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -5034,7 +5034,9 @@ SDValue X86TargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) {
   // Lower ((X >>u N) & 1) != 0 to BT.
   // Lower ((X >>s N) & 1) != 0 to BT.
   // FIXME: Is i386 or later or available only on some chips?
-  if (Op0.getOpcode() == ISD::AND && Op1.getOpcode() == ISD::Constant &&
+  if (Op0.getOpcode() == ISD::AND &&
+      Op0.hasOneUse() &&
+      Op1.getOpcode() == ISD::Constant &&
       Op0.getOperand(1).getOpcode() == ISD::Constant &&
       (CC == ISD::SETEQ || CC == ISD::SETNE)) {
     ConstantSDNode *AndRHS = cast<ConstantSDNode>(Op0.getOperand(1));