[llvm-commits] match gccas pass ordering change

[Chris Lattner]

Run an instcombine pass after inlining but before scalarrepl.  This  
allows instcombine to clean up the code, which makes more code  
suitable for SRoA.This helps C++ code in particular, e.g. speeding up  
tramp3d by 31%.


Index: llvm-backend.cpp
===================================================================
--- llvm-backend.cpp    (revision 122440)
+++ llvm-backend.cpp    (working copy)
@@ -245,6 +245,7 @@
      }

      PM->add(createTailDuplicationPass());      // Simplify cfg by  
copying code
+    PM->add(createInstructionCombiningPass()); // Cleanup for  
scalarrepl.
      PM->add(createCFGSimplificationPass());    // Merge & remove BBs
      PM->add(createScalarReplAggregatesPass()); // Break up  
aggregate allocas
      PM->add(createInstructionCombiningPass()); // Combine silly seq's