Merge 6006:6095 from bleeding_edge to experimental/gc branch.

src/ia32/lithium-codegen-ia32.h

Index: src/ia32/lithium-codegen-ia32.h
===================================================================
--- src/ia32/lithium-codegen-ia32.h	(revision 6095)
+++ src/ia32/lithium-codegen-ia32.h	(working copy)
@@ -176,6 +176,9 @@
   void DoMathRound(LUnaryMathOperation* instr);
   void DoMathSqrt(LUnaryMathOperation* instr);
   void DoMathPowHalf(LUnaryMathOperation* instr);
+  void DoMathLog(LUnaryMathOperation* instr);
+  void DoMathCos(LUnaryMathOperation* instr);
+  void DoMathSin(LUnaryMathOperation* instr);
 
   // Support for recording safepoint and position information.
   void RecordSafepoint(LPointerMap* pointers, int deoptimization_index);
@@ -196,6 +199,15 @@
   Condition EmitTypeofIs(Label* true_label, Label* false_label,
                          Register input, Handle<String> type_name);
 
+  // Emits optimized code for %_IsObject(x).  Preserves input register.
+  // Returns the condition on which a final split to
+  // true and false label should be made, to optimize fallthrough.
+  Condition EmitIsObject(Register input,
+                         Register temp1,
+                         Register temp2,
+                         Label* is_not_object,
+                         Label* is_object);
+
   LChunk* const chunk_;
   MacroAssembler* const masm_;
   CompilationInfo* const info_;