PPC: [runtime] Replace global object link with native context link in all contexts.

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index 6412aa243ac982232c6ba5f5a2d4498a09da100e..866e9d7baa55d57b79ebaba7ea33636e90a96ceb 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -430,8 +430,15 @@ class MacroAssembler : public Assembler {
 
   void LoadContext(Register dst, int context_chain_length);
 
+  // Load the global object from the current context.
+  void LoadGlobalObject(Register dst) {
+    LoadNativeContextSlot(Context::EXTENSION_INDEX, dst);
+  }
+
   // Load the global proxy from the current context.
-  void LoadGlobalProxy(Register dst);
+  void LoadGlobalProxy(Register dst) {
+    LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst);
+  }
 
   // Conditionally load the cached Array transitioned map of type
   // transitioned_kind from the native context if the map in register
@@ -443,7 +450,7 @@ class MacroAssembler : public Assembler {
                                            Register scratch,
                                            Label* no_map_match);
 
-  void LoadGlobalFunction(int index, Register function);
+  void LoadNativeContextSlot(int index, Register dst);
 
   // Load the initial map from the global function. The registers
   // function and map can be the same, function is then overwritten.
@@ -998,13 +1005,6 @@ class MacroAssembler : public Assembler {
   void InvokeBuiltin(int native_context_index, InvokeFlag flag,
                      const CallWrapper& call_wrapper = NullCallWrapper());
 
-  // Store the code object for the given builtin in the target register and
-  // setup the function in r1.
-  void GetBuiltinEntry(Register target, int native_context_index);
-
-  // Store the function for the given builtin in the target register.
-  void GetBuiltinFunction(Register target, int native_context_index);
-
   Handle<Object> CodeObject() {
     DCHECK(!code_object_.is_null());
     return code_object_;
@@ -1567,13 +1567,13 @@ class CodePatcher {
 // -----------------------------------------------------------------------------
 // Static helper functions.
 
-inline MemOperand ContextOperand(Register context, int index = 0) {
+inline MemOperand ContextMemOperand(Register context, int index = 0) {
   return MemOperand(context, Context::SlotOffset(index));
 }
 
 
-inline MemOperand GlobalObjectOperand() {
-  return ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX);
+inline MemOperand NativeContextMemOperand() {
+  return ContextMemOperand(cp, Context::NATIVE_CONTEXT_INDEX);
 }