commit 0c0996a97b5bd042996c8302943c90e8fe3eb831
author Evan Cheng <evan.cheng@apple.com> Wed May 31 18:03:39 2006 +0000
committer Evan Cheng <evan.cheng@apple.com> Wed May 31 18:03:39 2006 +0000
tree b92048c7d1a3375cfabf5414f6ad43bc5df74da2
parent 5dd0111188e4d4f7fd3d6a6b4fd43e7b77d9c445

commuteInstruction() does not always create a new MI!

llvm-svn: 28592

llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp

diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index d2820d9..1d15401 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -402,8 +402,10 @@
         DEBUG(std::cerr << "Sched: COMMUTING FAILED!\n");
       else {
         DEBUG(std::cerr << "Sched: COMMUTED TO: " << *NewMI);
-        delete MI;
-        MI = NewMI;
+        if (MI != NewMI) {
+          delete MI;
+          MI = NewMI;
+        }
       }
     }