[llvm-commits] [llvm] r153519 - /llvm/trunk/lib/Target/ARM/ARMLoadStoreOptimizer.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Tue Mar 27 12:33:52 2012
New Revision: 153519

URL: http://llvm.org/viewvc/llvm-project?rev=153519&view=rev
Log:
ARMLoadStoreOptimizer invalidates register liveness.

This pass tries to update kill flags, but there are still many bugs.
Passes after the load/store optimizer don't need accurate liveness, so
don't even try.

<rdar://problem/11101911>

Modified:
    llvm/trunk/lib/Target/ARM/ARMLoadStoreOptimizer.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMLoadStoreOptimizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMLoadStoreOptimizer.cpp?rev=153519&r1=153518&r2=153519&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMLoadStoreOptimizer.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMLoadStoreOptimizer.cpp Tue Mar 27 12:33:52 2012
@@ -1411,6 +1411,10 @@
   }
 
   delete RS;
+
+  // Kill flags aren't updated accurately by this pass.
+  Fn.getRegInfo().invalidateLiveness();
+
   return Modified;
 }