Assembler changes for enabling GrowHeap in Wasm

src/ia32/assembler-ia32.h

Index: src/ia32/assembler-ia32.h
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 470072f3274a95143036f0373a45fb6231e8d321..8a2e99ce387d0ef1e6e104559685d63ca3c03cae 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -271,6 +271,7 @@ class Immediate BASE_EMBEDDED {
   inline explicit Immediate(Handle<Object> handle);
   inline explicit Immediate(Smi* value);
   inline explicit Immediate(Address addr);
+  inline explicit Immediate(int x, RelocInfo::Mode rmode);

[Yang, 2016/03/03 06:21:56]

If I understand correctly, we use this to embed an address into the wasm heap
with this, right? Can we use the signation Immediate(Address, RelocInfo::Mode)
here? Otherwise you are just going to invite abuse.

[gdeepti1, 2016/03/03 18:00:10]

Done.

 
   static Immediate CodeRelativeOffset(Label* label) {
     return Immediate(label);