[llvm-commits] [llvm] r157004 - /llvm/trunk/lib/CodeGen/RegisterPressure.cpp

[Andrew Trick]

Author: atrick
Date: Thu May 17 13:35:05 2012
New Revision: 157004

URL: http://llvm.org/viewvc/llvm-project?rev=157004&view=rev
Log:
regpressure: Fix getMaxUpwardPressureDelta.

Modified:
    llvm/trunk/lib/CodeGen/RegisterPressure.cpp

Modified: llvm/trunk/lib/CodeGen/RegisterPressure.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/RegisterPressure.cpp?rev=157004&r1=157003&r2=157004&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/RegisterPressure.cpp (original)
+++ llvm/trunk/lib/CodeGen/RegisterPressure.cpp Thu May 17 13:35:05 2012
@@ -629,13 +629,17 @@
   // Generate liveness for uses.
   for (unsigned i = 0, e = PhysRegOpers.Uses.size(); i < e; ++i) {
     unsigned Reg = PhysRegOpers.Uses[i];
-    if (!hasRegAlias(Reg, LivePhysRegs, TRI)) {
+    if (!hasRegAlias(Reg, LivePhysRegs, TRI)
+        && (findRegAlias(Reg, PhysRegOpers.Defs, TRI)
+            == PhysRegOpers.Defs.end())) {
       increasePhysRegPressure(Reg);
     }
   }
   for (unsigned i = 0, e = VirtRegOpers.Uses.size(); i < e; ++i) {
     unsigned Reg = VirtRegOpers.Uses[i];
-    if (!LiveVirtRegs.count(Reg)) {
+    if (!LiveVirtRegs.count(Reg)
+        && (std::find(VirtRegOpers.Defs.begin(), VirtRegOpers.Defs.end(), Reg)
+            != VirtRegOpers.Defs.end())) {
       increaseVirtRegPressure(Reg);
     }
   }