commit f178418729d91e2f15a8eb27c0e4787b8ec7a3ce
author Evan Cheng <evan.cheng@apple.com> Tue Nov 15 06:26:51 2011 +0000
committer Evan Cheng <evan.cheng@apple.com> Tue Nov 15 06:26:51 2011 +0000
tree 0bdf4bbf65a5e4fa5ef48468fea9dbf66f9437ff
parent 3273c8937b8c3ebdd1cfc0c67054ce5571f0afc9

Set SeenStore to true to prevent loads from being moved; also eliminates a non-deterministic behavior.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144628 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/TwoAddressInstructionPass.cpp

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 6796312..e2fd007 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -924,7 +924,7 @@
   if (isTwoAddrUse(*KillMI, Reg, DstReg))
     return false;
 
-  bool SeenStore;
+  bool SeenStore = true;
   if (!MI->isSafeToMove(TII, AA, SeenStore))
     return false;
 
@@ -1071,7 +1071,7 @@
   if (isTwoAddrUse(*KillMI, Reg, DstReg))
     return false;
 
-  bool SeenStore;
+  bool SeenStore = true;
   if (!KillMI->isSafeToMove(TII, AA, SeenStore))
     return false;