Optimize Math.sin and Math.cos by avoiding runtime calls.

src/ia32/codegen-ia32-inl.h

Index: src/ia32/codegen-ia32-inl.h
===================================================================
--- src/ia32/codegen-ia32-inl.h	(revision 2163)
+++ src/ia32/codegen-ia32-inl.h	(working copy)
@@ -39,6 +39,16 @@
 void DeferredCode::Jump() { __ jmp(&entry_label_); }
 void DeferredCode::Branch(Condition cc) { __ j(cc, &entry_label_); }
 
+void CodeGenerator::GenerateMathSin(ZoneList<Expression*>* args) {
+  GenerateFastMathOp(SIN, args);
+}
+
+
+void CodeGenerator::GenerateMathCos(ZoneList<Expression*>* args) {
+  GenerateFastMathOp(COS, args);
+}
+
+
 #undef __
 
 } }  // namespace v8::internal