Convert BinadryDoubleOp to MathUnaryInstr double-square if both inputs are the same. Uses less regi…

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 5051 matching lines @@
 
   virtual bool MayThrow() const { return false; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UnboxIntegerInstr);
 };
 
 
 class MathUnaryInstr : public TemplateDefinition<1> {
  public:
-  MathUnaryInstr(MethodRecognizer::Kind kind, Value* value, intptr_t deopt_id)
+  enum MathUnaryKind {
+    kIllegal,
+    kSin,
+    kCos,
+    kSqrt,
+    kDoubleSquare,
+  };
+  MathUnaryInstr(MathUnaryKind kind, Value* value, intptr_t deopt_id)
       : kind_(kind) {
     SetInputAt(0, value);
     deopt_id_ = deopt_id;
   }
 
   Value* value() const { return inputs_[0]; }
-  MethodRecognizer::Kind kind() const { return kind_; }
+  MathUnaryKind kind() const { return kind_; }
   const RuntimeEntry& TargetFunction() const;
 
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const { return false; }
 
   virtual Representation representation() const {
     return kUnboxedDouble;
   }
 
@@ skipping 15 matching lines @@
   virtual EffectSet Effects() const { return EffectSet::None(); }
   virtual EffectSet Dependencies() const { return EffectSet::None(); }
   virtual bool AttributesEqual(Instruction* other) const {
     return kind() == other->AsMathUnary()->kind();
   }
 
   virtual bool MayThrow() const { return false; }
 
   Definition* Canonicalize(FlowGraph* flow_graph);
 
+  static const char* KindToCString(MathUnaryKind kind);
+
  private:
-  const MethodRecognizer::Kind kind_;
+  const MathUnaryKind kind_;
 
   DISALLOW_COPY_AND_ASSIGN(MathUnaryInstr);
 };
 
 
 // Represents Math's static min and max functions.
 class MathMinMaxInstr : public TemplateDefinition<2> {
  public:
   MathMinMaxInstr(MethodRecognizer::Kind op_kind,
                   Value* left_value,
@@ skipping 2817 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_