Merge up to 8597 to experimental/gc from the bleeding edge.

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
===================================================================
--- src/ia32/assembler-ia32.h	(revision 8618)
+++ src/ia32/assembler-ia32.h	(working copy)
@@ -668,6 +668,7 @@
   void push_imm32(int32_t imm32);
   void push(Register src);
   void push(const Operand& src);
+  void push(Handle<Object> handle);
 
   void pop(Register dst);
   void pop(const Operand& dst);
@@ -842,7 +843,7 @@
   void call(const Operand& adr);
   int CallSize(Handle<Code> code, RelocInfo::Mode mode);
   void call(Handle<Code> code,
-            RelocInfo::Mode rmode,
+            RelocInfo::Mode rmode = RelocInfo::CODE_TARGET,
             unsigned ast_id = kNoASTId);
 
   // Jumps
@@ -997,7 +998,9 @@
   void Print();
 
   // Check the code size generated from label to here.
-  int SizeOfCodeGeneratedSince(Label* l) { return pc_offset() - l->pos(); }
+  int SizeOfCodeGeneratedSince(Label* label) {
+    return pc_offset() - label->pos();
+  }
 
   // Mark address of the ExitJSFrame code.
   void RecordJSReturn();