Remove unused --peephole-optimization flag.

R=danno@chromium.org
BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9361022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10630 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/flag-definitions.h

@@ -168,8 +168,6 @@ DEFINE_int(loop_weight, 1, "loop weight for representation inference")
 DEFINE_bool(debug_code, false,
             "generate extra code (assertions) for debugging")
 DEFINE_bool(code_comments, false, "emit comments in code disassembly")
-DEFINE_bool(peephole_optimization, true,
-            "perform peephole optimizations in assembly code")
 DEFINE_bool(enable_sse2, true,
             "enable use of SSE2 instructions if available")
 DEFINE_bool(enable_sse3, true,

src/v8.cc

-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -255,9 +255,6 @@ void V8::InitializeOncePerProcess() {
 
   RuntimeProfiler::GlobalSetup();
 
-  // Peephole optimization might interfere with deoptimization.
-  FLAG_peephole_optimization = !use_crankshaft_;
-
   ElementsAccessor::InitializeOncePerProcess();
 
   if (FLAG_stress_compaction) {