Type feedback for Unary Plus

src/hydrogen-instructions.cc

 // 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:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1418 matching lines @@
 }
 
 
 HValue* HSub::Canonicalize() {
   if (!representation().IsInteger32()) return this;
   if (CheckUsesForFlag(kTruncatingToInt32)) ClearFlag(kCanOverflow);
   return this;
 }
 
 
+HValue* HMul::Canonicalize() {
+  if (left()->IsInteger32Constant() &&
+      HConstant::cast(left())->Integer32Value() == 1 &&
+      right()->representation().IsSpecialization()) {
+    return right();
+  }
+  return this;
+}
+
+
 HValue* HChange::Canonicalize() {
   return (from().Equals(to())) ? value() : this;
 }
 
 
 HValue* HWrapReceiver::Canonicalize() {
   if (HasNoUses()) return NULL;
   if (receiver()->type().IsJSObject()) {
     return receiver();
   }
@@ skipping 2121 matching lines @@
 
 
 void HCheckFunction::Verify() {
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
 #endif
 
 } }  // namespace v8::internal