Run another local value numbering phase after redundancy elimination
llvm-svn: 2625
diff --git a/llvm/tools/gccas/gccas.cpp b/llvm/tools/gccas/gccas.cpp
index c2f7a8c..1a0067e 100644
--- a/llvm/tools/gccas/gccas.cpp
+++ b/llvm/tools/gccas/gccas.cpp
@@ -83,6 +83,10 @@
Passes.add(createLICMPass()); // Hoist loop invariants
Passes.add(createGCSEPass()); // Remove common subexprs
Passes.add(createSCCPPass()); // Constant prop with SCCP
+
+ // Run instcombine after redundancy elimination to exploit opportunities
+ // opened up by them.
+ Passes.add(createInstructionCombiningPass());
Passes.add(createDeadCodeEliminationPass()); // Remove Dead code/vars
}
Passes.add(new WriteBytecodePass(&Out)); // Write bytecode to file...