X87: enable the crankshaft compiler for X87 port.

src/x87/lithium-codegen-x87.h

Index: src/x87/lithium-codegen-x87.h
diff --git a/src/x87/lithium-codegen-x87.h b/src/x87/lithium-codegen-x87.h
index 080a468292a710d48853ea1c6a0602fe7919ce01..db562129673829f7bfda5523b39bd01778e7a98e 100644
--- a/src/x87/lithium-codegen-x87.h
+++ b/src/x87/lithium-codegen-x87.h
@@ -5,6 +5,7 @@
 #ifndef V8_X87_LITHIUM_CODEGEN_X87_H_
 #define V8_X87_LITHIUM_CODEGEN_X87_H_
 
+#include <map>
 #include "src/x87/lithium-x87.h"
 
 #include "src/base/logging.h"
@@ -84,6 +85,8 @@ class LCodeGen: public LCodeGenBase {
       X87OperandType operand = kX87DoubleOperand);
   void X87Mov(Operand src, X87Register reg,
       X87OperandType operand = kX87DoubleOperand);
+  void X87Mov(X87Register reg, X87Register src,
+      X87OperandType operand = kX87DoubleOperand);
 
   void X87PrepareBinaryOp(
       X87Register left, X87Register right, X87Register result);
@@ -200,7 +203,8 @@ class LCodeGen: public LCodeGenBase {
 
   void CallRuntime(const Runtime::Function* fun,
                    int argc,
-                   LInstruction* instr);
+                   LInstruction* instr,
+                   SaveFPRegsMode save_doubles = kDontSaveFPRegs);
 
   void CallRuntime(Runtime::FunctionId id,
                    int argc,
@@ -376,7 +380,7 @@ class LCodeGen: public LCodeGenBase {
   int osr_pc_offset_;
   bool frame_is_built_;
 
-  class X87Stack {
+  class X87Stack : public ZoneObject {
    public:
     explicit X87Stack(MacroAssembler* masm)
         : stack_depth_(0), is_mutable_(true), masm_(masm) { }
@@ -393,14 +397,23 @@ class LCodeGen: public LCodeGenBase {
       }
       return true;
     }
+    X87Stack& operator=(const X87Stack& other) {
+      stack_depth_ = other.stack_depth_;
+      for (int i = 0; i < stack_depth_; i++) {
+        stack_[i] = other.stack_[i];
+      }
+      return *this;
+    }
     bool Contains(X87Register reg);
     void Fxch(X87Register reg, int other_slot = 0);
     void Free(X87Register reg);
     void PrepareToWrite(X87Register reg);
     void CommitWrite(X87Register reg);
     void FlushIfNecessary(LInstruction* instr, LCodeGen* cgen);
-    void LeavingBlock(int current_block_id, LGoto* goto_instr);
+    void LeavingBlock(int current_block_id, LGoto* goto_instr, LCodeGen* cgen);
     int depth() const { return stack_depth_; }
+    int GetLayout();
+    int st(X87Register reg) { return st2idx(ArrayIndex(reg)); }
     void pop() {
       DCHECK(is_mutable_);
       stack_depth_--;
@@ -425,6 +438,9 @@ class LCodeGen: public LCodeGenBase {
     MacroAssembler* masm_;
   };
   X87Stack x87_stack_;
+  // block_id -> X87Stack*;
+  typedef std::map<int, X87Stack*> X87StackMap;
+  X87StackMap x87_stack_map_;
 
   // Builder that keeps track of safepoints in the code. The table
   // itself is emitted at the end of the generated code.
@@ -458,6 +474,7 @@ class LCodeGen: public LCodeGenBase {
   friend class LDeferredCode;
   friend class LEnvironment;
   friend class SafepointGenerator;
+  friend class X87Stack;
   DISALLOW_COPY_AND_ASSIGN(LCodeGen);
 };