Merge sin(a), cos(a) into one instruction. TODO: Implement for ARM and MIPS.

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 6649 matching lines @@
     kSinCos,
   };
 
   MergedMathInstr(ZoneGrowableArray<Value*>* inputs,
                   intptr_t original_deopt_id,
                   MergedMathInstr::Kind kind);
 
   static intptr_t InputCountFor(MergedMathInstr::Kind kind) {
     if (kind == kTruncDivMod) {
       return 2;
+    } else if (kind == kSinCos) {
+      return 1;
     } else {
       UNIMPLEMENTED();
       return -1;
     }
   }
 
   MergedMathInstr::Kind kind() const { return kind_; }
 
   virtual intptr_t InputCount() const { return inputs_->length(); }
 
   virtual Value* InputAt(intptr_t i) const {
     return (*inputs_)[i];
   }
 
   virtual CompileType ComputeType() const;
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   virtual bool CanDeoptimize() const {
     if (kind_ == kTruncDivMod) {
       return true;
+    } else if (kind_ == kSinCos) {
+      return false;
     } else {
       UNIMPLEMENTED();
       return false;
     }
   }
 
   virtual Representation representation() const {
     if (kind_ == kTruncDivMod) {
       return kTagged;
+    } else if (kind_ == kSinCos) {
+      return kTagged;
     } else {
       UNIMPLEMENTED();
       return kTagged;
     }
   }
 
   virtual Representation RequiredInputRepresentation(intptr_t idx) const {
+    ASSERT((0 <= idx) && (idx < InputCount()));
     if (kind_ == kTruncDivMod) {
-      ASSERT((0 <= idx) && (idx < InputCount()));
       return kTagged;
+    } else if (kind_ == kSinCos) {
+      return kUnboxedDouble;
     } else {
       UNIMPLEMENTED();
       return kTagged;
     }
   }
 
   virtual intptr_t DeoptimizationTarget() const { return deopt_id_; }
 
+  // Returns the result index for one of the merged instructjons
+  static intptr_t ResultIndexOf(MethodRecognizer::Kind kind);
+  static intptr_t ResultIndexOf(Token::Kind token);
+
   DECLARE_INSTRUCTION(MergedMath)
 
   // Returns a structure describing the location constraints required
   // to emit native code for this definition.
   LocationSummary* locs() {
     if (locs_ == NULL) {
       locs_ = MakeLocationSummary();
     }
     return locs_;
   }
 
   virtual bool AllowsCSE() const { return true; }
   virtual EffectSet Effects() const { return EffectSet::None(); }
   virtual EffectSet Dependencies() const { return EffectSet::None(); }
   virtual bool AttributesEqual(Instruction* other) const {
     MergedMathInstr* other_invoke = other->AsMergedMath();
     return other_invoke->kind() == kind();
   }
 
   virtual bool MayThrow() const { return false; }
 
   static const char* KindToCString(MergedMathInstr::Kind kind) {
     if (kind == kTruncDivMod) return "TruncDivMod";
+    if (kind == kSinCos) return "SinCos";
     UNIMPLEMENTED();
     return "";
   }
 
  private:
   virtual void RawSetInputAt(intptr_t i, Value* value) {
     (*inputs_)[i] = value;
   }
 
   ZoneGrowableArray<Value*>* inputs_;
@@ skipping 333 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_