[wasm] Increase WebAssembly.Memory maximum size to ~2GB

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 312 matching lines @@
 const int kLastChunkTagMask = 1;
 const int kLastChunkTag = 1;
 
 const int kCodeWithIdTag = 0;
 const int kDeoptReasonTag = 1;
 
 void RelocInfo::update_wasm_memory_reference(
     Isolate* isolate, Address old_base, Address new_base,
     ICacheFlushMode icache_flush_mode) {
   DCHECK(IsWasmMemoryReference(rmode_));
-  DCHECK_GE(wasm_memory_reference(), old_base);
   Address updated_reference = new_base + (wasm_memory_reference() - old_base);
   // The reference is not checked here but at runtime. Validity of references
   // may change over time.
   unchecked_update_wasm_memory_reference(isolate, updated_reference,
                                          icache_flush_mode);
 }
 
 void RelocInfo::update_wasm_memory_size(Isolate* isolate, uint32_t old_size,
                                         uint32_t new_size,
                                         ICacheFlushMode icache_flush_mode) {
@@ skipping 1673 matching lines @@
 
 void Assembler::DataAlign(int m) {
   DCHECK(m >= 2 && base::bits::IsPowerOfTwo32(m));
   while ((pc_offset() & (m - 1)) != 0) {
     db(0);
   }
 }
 
 }  // namespace internal
 }  // namespace v8