Inline Doubles truncate and round.

runtime/vm/intermediate_language.h

 // Copyright (c) 2012, 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 26 matching lines @@
   V(_ImmutableArray, get:length, ImmutableArrayLength, 433698233)              \
   V(_ByteArrayBase, get:length, ByteArrayBaseLength, 1098081765)               \
   V(_GrowableObjectArray, get:length, GrowableArrayLength, 725548050)          \
   V(_GrowableObjectArray, get:_capacity, GrowableArrayCapacity, 725548050)     \
   V(_StringBase, get:length, StringBaseLength, 320803993)                      \
   V(_StringBase, get:isEmpty, StringBaseIsEmpty, 711547329)                    \
   V(_StringBase, charCodeAt, StringBaseCharCodeAt, 984449525)                  \
   V(_StringBase, [], StringBaseCharAt, 1062366987)                             \
   V(_IntegerImplementation, toDouble, IntegerToDouble, 733149324)              \
   V(_Double, toInt, DoubleToInteger, 362666636)                                \
+  V(_Double, truncate, DoubleTruncate, 620870996)                              \
+  V(_Double, round, DoubleRound, 620870996)                                    \
   V(::, sqrt, MathSqrt, 1662640002)                                            \
 
 // Class that recognizes the name and owner of a function and returns the
 // corresponding enum. See RECOGNIZED_LIST above for list of recognizable
 // functions.
 class MethodRecognizer : public AllStatic {
  public:
   enum Kind {
     kUnknown,
 #define DEFINE_ENUM_LIST(class_name, function_name, enum_name, fp) k##enum_name,
@@ skipping 190 matching lines @@
   M(AllocateContext)                                                           \
   M(ChainContext)                                                              \
   M(CloneContext)                                                              \
   M(CatchEntry)                                                                \
   M(BinarySmiOp)                                                               \
   M(UnarySmiOp)                                                                \
   M(CheckStackOverflow)                                                        \
   M(SmiToDouble)                                                               \
   M(DoubleToInteger)                                                           \
   M(DoubleToSmi)                                                               \
+  M(DoubleToDouble)                                                            \
   M(CheckClass)                                                                \
   M(CheckSmi)                                                                  \
   M(Constant)                                                                  \
   M(CheckEitherNonSmi)                                                         \
   M(BinaryDoubleOp)                                                            \
   M(MathSqrt)                                                                  \
   M(UnboxDouble)                                                               \
   M(BoxDouble)                                                                 \
   M(UnboxInteger)                                                              \
   M(BoxInteger)                                                                \
@@ skipping 237 matching lines @@
   friend class ShiftMintOpInstr;
   friend class UnaryMintOpInstr;
   friend class MathSqrtInstr;
   friend class CheckClassInstr;
   friend class CheckSmiInstr;
   friend class CheckArrayBoundInstr;
   friend class CheckEitherNonSmiInstr;
   friend class StringCharCodeAtInstr;
   friend class LICM;
   friend class DoubleToSmiInstr;
+  friend class DoubleToDoubleInstr;
 
   intptr_t deopt_id_;
   intptr_t lifetime_position_;  // Position used by register allocator.
   Instruction* previous_;
   Instruction* next_;
   Environment* env_;
   intptr_t expr_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Instruction);
 };
@@ skipping 3487 matching lines @@
     return kUnboxedDouble;
   }
 
   virtual intptr_t DeoptimizationTarget() const { return deopt_id_; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DoubleToSmiInstr);
 };
 
 
+class DoubleToDoubleInstr : public TemplateDefinition<1> {
+ public:
+  DoubleToDoubleInstr(Value* value,
+                      InstanceCallInstr* instance_call,
+                      MethodRecognizer::Kind recognized_kind)
+    : recognized_kind_(recognized_kind) {
+    ASSERT(value != NULL);
+    inputs_[0] = value;
+    deopt_id_ = instance_call->deopt_id();
+  }
+
+  Value* value() const { return inputs_[0]; }
+
+  MethodRecognizer::Kind recognized_kind() const { return recognized_kind_; }
+
+  DECLARE_INSTRUCTION(DoubleToDouble)
+  virtual RawAbstractType* CompileType() const;
+
+  virtual bool CanDeoptimize() const { return false; }
+
+  virtual bool HasSideEffect() const { return false; }
+
+  // Result could be any of the int types.

[Florian Schneider, 2013/01/11 09:49:30]

I don't understand this comment. It seems not applicable here.

[srdjan, 2013/01/11 19:41:08]

Sorry removed that comment, but forgot to upload.

+  virtual intptr_t ResultCid() const { return kDoubleCid; }
+
+  virtual Representation representation() const {
+    return kUnboxedDouble;
+  }
+
+  virtual Representation RequiredInputRepresentation(intptr_t idx) const {
+    ASSERT(idx == 0);
+    return kUnboxedDouble;
+  }
+
+  virtual intptr_t DeoptimizationTarget() const { return deopt_id_; }
+
+ private:
+  const MethodRecognizer::Kind recognized_kind_;
+
+  DISALLOW_COPY_AND_ASSIGN(DoubleToDoubleInstr);
+};
+
+
 class CheckClassInstr : public TemplateInstruction<1> {
  public:
   CheckClassInstr(Value* value,
                   intptr_t deopt_id,
                   const ICData& unary_checks);
 
   DECLARE_INSTRUCTION(CheckClass)
   virtual RawAbstractType* CompileType() const;
 
   virtual intptr_t ArgumentCount() const { return 0; }
@@ skipping 305 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_