A64: Remove early_exit unused mechanism in CompareMap.

R=jochen@chromium.org, ulan@chromium.org

Review URL: https://codereview.chromium.org/169733003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19473 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/a64/lithium-codegen-a64.cc

@@ -2109,7 +2109,7 @@ void LCodeGen::DoCheckMaps(LCheckMaps* instr) {
   Label success;
   for (int i = 0; i < map_set.size(); i++) {
     Handle<Map> map = map_set.at(i).handle();
-    __ CompareMap(map_reg, map, &success);
+    __ CompareMap(map_reg, map);
     __ B(eq, &success);
   }
 

src/a64/macro-assembler-a64.cc

@@ -3441,18 +3441,14 @@ void MacroAssembler::CompareInstanceType(Register map,
 
 void MacroAssembler::CompareMap(Register obj,
                                 Register scratch,
-                                Handle<Map> map,
-                                Label* early_success) {
-  // TODO(jbramley): The early_success label isn't used. Remove it.
+                                Handle<Map> map) {
   Ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset));
-  CompareMap(scratch, map, early_success);
+  CompareMap(scratch, map);
 }
 
 
 void MacroAssembler::CompareMap(Register obj_map,
-                                Handle<Map> map,
-                                Label* early_success) {
-  // TODO(jbramley): The early_success label isn't used. Remove it.
+                                Handle<Map> map) {
   Cmp(obj_map, Operand(map));
 }
 
@@ -3466,10 +3462,8 @@ void MacroAssembler::CheckMap(Register obj,
     JumpIfSmi(obj, fail);
   }
 
-  Label success;
-  CompareMap(obj, scratch, map, &success);
+  CompareMap(obj, scratch, map);
   B(ne, fail);
-  Bind(&success);
 }
 
 
@@ -3493,10 +3487,9 @@ void MacroAssembler::CheckMap(Register obj_map,
   if (smi_check_type == DO_SMI_CHECK) {
     JumpIfSmi(obj_map, fail);
   }
-  Label success;
-  CompareMap(obj_map, map, &success);
+
+  CompareMap(obj_map, map);
   B(ne, fail);
-  Bind(&success);
 }
 
 

src/a64/macro-assembler-a64.h

@@ -1307,20 +1307,16 @@ class MacroAssembler : public Assembler {
                            Register type_reg,
                            InstanceType type);
 
-  // Compare an object's map with the specified map and its transitioned
-  // elements maps if mode is ALLOW_ELEMENT_TRANSITION_MAPS. Condition flags are
-  // set with result of map compare. If multiple map compares are required, the
-  // compare sequences branches to early_success.
+  // Compare an object's map with the specified map. Condition flags are set
+  // with result of map compare.
   void CompareMap(Register obj,
                   Register scratch,
-                  Handle<Map> map,
-                  Label* early_success = NULL);
+                  Handle<Map> map);
 
   // As above, but the map of the object is already loaded into the register
   // which is preserved by the code generated.
   void CompareMap(Register obj_map,
-                  Handle<Map> map,
-                  Label* early_success = NULL);
+                  Handle<Map> map);
 
   // Check if the map of an object is equal to a specified map and branch to
   // label if not. Skip the smi check if not required (object is known to be a