[llvm-commits] [llvm] r115099 - /llvm/trunk/include/llvm/Support/StandardPasses.h

[Owen Anderson]

Author: resistor
Date: Wed Sep 29 17:57:02 2010
New Revision: 115099

URL: http://llvm.org/viewvc/llvm-project?rev=115099&view=rev
Log:
Early CFG simplification can fold conditionals down to selects, which is often a good thing, but it can also
hide jump threading opportunities by turning control flow into data flow.  Run an early JumpThreading pass
(adds approximately an additional 1% to optimization time on SPEC), allowing it to get a shot at these cases
first.  Fixes <rdar://problem/8447345>.

Modified:
    llvm/trunk/include/llvm/Support/StandardPasses.h

Modified: llvm/trunk/include/llvm/Support/StandardPasses.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Support/StandardPasses.h?rev=115099&r1=115098&r2=115099&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Support/StandardPasses.h (original)
+++ llvm/trunk/include/llvm/Support/StandardPasses.h Wed Sep 29 17:57:02 2010
@@ -104,6 +104,7 @@
       PM->add(createDeadArgEliminationPass());  // Dead argument elimination
     }
     PM->add(createInstructionCombiningPass());  // Clean up after IPCP & DAE
+    PM->add(createJumpThreadingPass());         // Clean up after IPCP & DAE
     PM->add(createCFGSimplificationPass());     // Clean up after IPCP & DAE
     
     // Start of CallGraph SCC passes.