[llvm-commits] [llvm] r67587 - /llvm/trunk/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp

[Dan Gohman]

Author: djg
Date: Mon Mar 23 19:50:07 2009
New Revision: 67587

URL: http://llvm.org/viewvc/llvm-project?rev=67587&view=rev
Log:
Minor compile-time optimization; don't bother checking
canClobberPhysRegDefs if the successor node doesn't
clobber any physical registers.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp?rev=67587&r1=67586&r2=67587&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp Mon Mar 23 19:50:07 2009
@@ -1392,7 +1392,7 @@
           continue;
         // Don't constrain nodes with physical register defs if the
         // predecessor can clobber them.
-        if (SuccSU->hasPhysRegDefs) {
+        if (SuccSU->hasPhysRegDefs && SU->hasPhysRegClobbers) {
           if (canClobberPhysRegDefs(SuccSU, SU, TII, TRI))
             continue;
         }