First part of lithium ARM port.

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 5b152eff84953abade3de1b2e31b439c86800c56..4bc4791aeae164db139bf2b7faf58283cb52057e 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -1122,10 +1122,12 @@ class LBranch: public LUnaryOperation {
 class LCmpMapAndBranch: public LUnaryOperation {
  public:
   LCmpMapAndBranch(LOperand* value,
+                   LOperand* temp,
                    Handle<Map> map,
                    int true_block_id,
                    int false_block_id)
       : LUnaryOperation(value),
+        temp_(temp),
         map_(map),
         true_block_id_(true_block_id),
         false_block_id_(false_block_id) { }
@@ -1134,11 +1136,13 @@ class LCmpMapAndBranch: public LUnaryOperation {
 
   virtual bool IsControl() const { return true; }
 
+  LOperand* temp() const { return temp_; }
   Handle<Map> map() const { return map_; }
   int true_block_id() const { return true_block_id_; }
   int false_block_id() const { return false_block_id_; }
 
  private:
+  LOperand* temp_;
   Handle<Map> map_;

[Kevin Millikin (Chromium), 2011/01/04 09:17:19]

FYI you shouldn't need any of the fields map_, true_block_id_, or
false_block_id_.  You can keep the accessors and just delegate them to the
corresponding hydrogen instruction:

Handle<Map> map() const { return hydrogen()->map(); }
int true_block_id() const { return hydrogen()->FirstSuccessor()->block_id(); }

Though HCompareMapAndBranch::FirstSuccessor is virtual so you may prefer
duplicating the block ID in the Lithium instruction or else exposing a
non-virtual accessor on HCompareMapAndBranch.

You will need the macro invocation

DECLARE_HYDROGEN_ACCESSOR(CompareMapAndBranch)

in this class.  I realize this is just ported from the ia32 code, but you could
also feel free to clean it up at the same time you do the porting---a hidden
benefit of writing the port.

[Karl Klose, 2011/01/04 12:32:18]

Done.

   int true_block_id_;
   int false_block_id_;
@@ -1678,21 +1682,25 @@ class LCheckMap: public LUnaryOperation {
 
 class LCheckPrototypeMaps: public LInstruction {
  public:
-  LCheckPrototypeMaps(LOperand* temp,
+  LCheckPrototypeMaps(LOperand* temp1,
+                      LOperand* temp2,
                       Handle<JSObject> holder,
                       Handle<Map> receiver_map)
-      : temp_(temp),
+      : temp1_(temp1),
+        temp2_(temp2),
         holder_(holder),
         receiver_map_(receiver_map) { }
 
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
 
-  LOperand* temp() const { return temp_; }
+  LOperand* temp1() const { return temp1_; }
+  LOperand* temp2() const { return temp2_; }
   Handle<JSObject> holder() const { return holder_; }
   Handle<Map> receiver_map() const { return receiver_map_; }
 
  private:
-  LOperand* temp_;
+  LOperand* temp1_;
+  LOperand* temp2_;
   Handle<JSObject> holder_;
   Handle<Map> receiver_map_;
 };