H-BuildIncrement should make use of available type feedback

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/22611009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16353 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ast.h

@@ -1963,7 +1963,7 @@ class CountOperation V8_FINAL : public Expression {
   Expression* expression() const { return expression_; }
   virtual int position() const V8_OVERRIDE { return pos_; }
 
-  void RecordTypeFeedback(TypeFeedbackOracle* oracle, Zone* znoe);
+  void RecordTypeFeedback(TypeFeedbackOracle* oracle, Zone* zone);
   virtual bool IsMonomorphic() V8_OVERRIDE { return is_monomorphic_; }
   virtual SmallMapList* GetReceiverTypes() V8_OVERRIDE {
     return &receiver_types_;

src/hydrogen.cc

@@ -7494,7 +7494,12 @@ HInstruction* HOptimizedGraphBuilder::BuildIncrement(
   HConstant* delta = (expr->op() == Token::INC)
       ? graph()->GetConstant1()
       : graph()->GetConstantMinus1();
-  HInstruction* instr = Add<HAdd>(Top(), delta);
+  HInstruction* instr = AddUncasted<HAdd>(Top(), delta);
+  if (instr->IsAdd()) {
+    HAdd* add = HAdd::cast(instr);
+    add->set_observed_input_representation(1, rep);
+    add->set_observed_input_representation(2, Representation::Smi());
+  }
   instr->SetFlag(HInstruction::kCannotBeTagged);
   instr->ClearAllSideEffects();
   return instr;

src/hydrogen.h

@@ -1058,7 +1058,7 @@ class HGraphBuilder {
 
   template<class I, class P1, class P2>
   I* Add(P1 p1, P2 p2) {
-    return static_cast<I*>(AddUncasted<I>(p1, p2));
+    return I::cast(AddUncasted<I>(p1, p2));
   }
 
   template<class I, class P1, class P2, class P3>

test/mjsunit/compiler/increment-typefeedback.js

+// Copyright 2013 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax
+
+function f(x) {
+  x++;
+  return x;
+}
+
+f(0.5);
+f(0.5);
+%OptimizeFunctionOnNextCall(f);
+f(0.5);
+assertOptimized(f);