[v8-dev] ARM: Optimize TypeofIsAndBranch

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 4897064fc68f88e01510b4bf48962995dc0ff4f6..e0f92dfa8eecee1d082e9186176b0388b84e7ada 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -845,11 +845,20 @@ class MacroAssembler: public Assembler {
   // are the same register).  It leaves the heap object in the heap_object
   // register unless the heap_object register is the same register as one of the
   // other registers.
+  // Type_reg can be no_reg. In that case ip is used.
   void CompareObjectType(Register heap_object,
                          Register map,
                          Register type_reg,
                          InstanceType type);
 
+  // Compare object type for heap object. Branch to false_label if type
+  // is lower than min_type or greater than max_type.

[ulan, 2013/11/22 15:43:46]

Add a comment that it writes map to the given map register, since we are relying
on it.

+  void CheckObjectTypeRange(Register heap_object,
+                              Register map,

[ulan, 2013/11/22 15:43:46]

Indentation is off

+                              InstanceType min_type,
+                              InstanceType max_type,
+                              Label* false_label);
+
   // Compare instance type in a map.  map contains a valid map object whose
   // object type should be compared with the given type.  This both
   // sets the flags and leaves the object type in the type_reg register.