[llvm-commits] [llvm] r144636 - /llvm/trunk/lib/CodeGen/ExecutionDepsFix.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Tue Nov 15 02:20:43 2011
New Revision: 144636

URL: http://llvm.org/viewvc/llvm-project?rev=144636&view=rev
Log:
Check all overlaps when looking for used registers.

A function using any RC alias is enough to enable the ExeDepsFix pass.

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

Modified: llvm/trunk/lib/CodeGen/ExecutionDepsFix.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/ExecutionDepsFix.cpp?rev=144636&r1=144635&r2=144636&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/ExecutionDepsFix.cpp (original)
+++ llvm/trunk/lib/CodeGen/ExecutionDepsFix.cpp Tue Nov 15 02:20:43 2011
@@ -650,10 +650,11 @@
   bool anyregs = false;
   for (TargetRegisterClass::const_iterator I = RC->begin(), E = RC->end();
        I != E; ++I)
-    if (MF->getRegInfo().isPhysRegUsed(*I)) {
-      anyregs = true;
-      break;
-    }
+    for (const unsigned *AI = TRI->getOverlaps(*I); *AI; ++AI)
+      if (MF->getRegInfo().isPhysRegUsed(*AI)) {
+        anyregs = true;
+        break;
+      }
   if (!anyregs) return false;
 
   // Initialize the AliasMap on the first use.