Enable 'predsimplify' optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30589 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/gccas/gccas.cpp b/tools/gccas/gccas.cpp
index c46b296..8ac8ed4 100644
--- a/tools/gccas/gccas.cpp
+++ b/tools/gccas/gccas.cpp
@@ -103,6 +103,7 @@
   addPass(PM, createCFGSimplificationPass());    // Merge & remove BBs
   addPass(PM, createScalarReplAggregatesPass()); // Break up aggregate allocas
   addPass(PM, createInstructionCombiningPass()); // Combine silly seq's
+  addPass(PM, createPredicateSimplifierPass());  // Canonicalize registers
   addPass(PM, createCondPropagationPass());      // Propagate conditionals
 
   addPass(PM, createTailCallEliminationPass());  // Eliminate tail calls
diff --git a/tools/gccld/GenerateCode.cpp b/tools/gccld/GenerateCode.cpp
index 38b3d41..2e81d38 100644
--- a/tools/gccld/GenerateCode.cpp
+++ b/tools/gccld/GenerateCode.cpp
@@ -248,6 +248,7 @@
 
     // The IPO passes may leave cruft around.  Clean up after them.
     addPass(Passes, createInstructionCombiningPass());
+    addPass(Passes, createPredicateSimplifierPass());
 
     addPass(Passes, createScalarReplAggregatesPass()); // Break up allocas