Assembler changes for enabling GrowHeap in Wasm

src/ia32/assembler-ia32-inl.h

Index: src/ia32/assembler-ia32-inl.h
diff --git a/src/ia32/assembler-ia32-inl.h b/src/ia32/assembler-ia32-inl.h
index cb6bad8a20f71f28c1c8c70cf8d8afee2a69e46c..4cf94193d341fdcdc5fb7acb05e030ee699c30dc 100644
--- a/src/ia32/assembler-ia32-inl.h
+++ b/src/ia32/assembler-ia32-inl.h
@@ -81,6 +81,10 @@ Address RelocInfo::target_address() {
   return Assembler::target_address_at(pc_, host_);
 }
 
+Address RelocInfo::wasm_memory_reference() {
+  DCHECK(IsWasmMemoryReference(rmode_));
+  return Assembler::target_address_at(pc_, host_);
+}
 
 Address RelocInfo::target_address_address() {
   DCHECK(IsCodeTarget(rmode_) || IsRuntimeEntry(rmode_)
@@ -115,6 +119,17 @@ void RelocInfo::set_target_address(Address target,
   }
 }
 
+void RelocInfo::update_wasm_memory_reference(
+    Address old_base, Address new_base, size_t old_size, size_t new_size,
+    ICacheFlushMode icache_flush_mode) {
+  DCHECK(IsWasmMemoryReference(rmode_));
+  DCHECK(new_size > old_size);
+  DCHECK(old_base + old_size >= wasm_memory_reference());
+  Address updated_reference = wasm_memory_reference() + (new_base - old_base);
+  DCHECK(new_base + new_size >= updated_reference);
+  Assembler::set_target_address_at(isolate_, pc_, host_, updated_reference,
+                                   icache_flush_mode);
+}
 
 Object* RelocInfo::target_object() {
   DCHECK(IsCodeTarget(rmode_) || rmode_ == EMBEDDED_OBJECT);
@@ -321,6 +336,10 @@ Immediate::Immediate(int x)  {
   rmode_ = RelocInfo::NONE32;
 }
 
+Immediate::Immediate(Address x, RelocInfo::Mode rmode) {
+  x_ = reinterpret_cast<int32_t>(x);
+  rmode_ = rmode;
+}
 
 Immediate::Immediate(const ExternalReference& ext) {
   x_ = reinterpret_cast<int32_t>(ext.address());