Fast codegen: Implement with.

src/ia32/fast-codegen-ia32.cc

Index: src/ia32/fast-codegen-ia32.cc
diff --git a/src/ia32/fast-codegen-ia32.cc b/src/ia32/fast-codegen-ia32.cc
index 1e4473c1a269480c3ac842b9e82ac5bbc0941fae..d7873a8792e00f73b48d82662ada929267762695 100644
--- a/src/ia32/fast-codegen-ia32.cc
+++ b/src/ia32/fast-codegen-ia32.cc
@@ -1665,6 +1665,21 @@ void FastCodeGenerator::VisitThisFunction(ThisFunction* expr) {
 
 Register FastCodeGenerator::result_register() { return eax; }
 
+
+Register FastCodeGenerator::context_register() { return esi; }
+
+
+void FastCodeGenerator::StoreFrameField(int frame_offset, Register value) {
+  ASSERT_EQ(POINTER_SIZE_ALIGN(frame_offset), frame_offset);
+  __ mov(Operand(ebp, frame_offset), value);
+}
+
+
+void FastCodeGenerator::LoadContextField(Register dst, int context_index) {
+  __ mov(dst, Operand(context_register(), Context::SlotOffset(context_index)));
+}
+
+
 // ----------------------------------------------------------------------------
 // Non-local control flow support.