commit f50c7981ae9b81f1212d72a06d1c05e20d0559af
author Dan Gohman <gohman@apple.com> Fri Apr 03 20:11:30 2009 +0000
committer Dan Gohman <gohman@apple.com> Fri Apr 03 20:11:30 2009 +0000
tree 5ccb8a1549f1e7a872775012c3b4ee6bdd81fb0b
parent 38f4dd7b5e333aee8f89cee85d1c79378fee0ffc

Fix a TargetLowering optimization so that it doesn't duplicate
loads when an input node has multiple uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68398 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 3f0bf5b..79a48a6 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -1464,6 +1464,7 @@
       // in the same partial word, see if we can shorten the load.
       if (DCI.isBeforeLegalize() &&
           N0.getOpcode() == ISD::AND && C1 == 0 &&
+          N0.getNode()->hasOneUse() &&
           isa<LoadSDNode>(N0.getOperand(0)) &&
           N0.getOperand(0).getNode()->hasOneUse() &&
           isa<ConstantSDNode>(N0.getOperand(1))) {