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

src/compiler/wasm-compiler.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/wasm-compiler.h"
 
 #include <memory>
 
 #include "src/assembler-inl.h"
 #include "src/base/platform/elapsed-timer.h"
@@ skipping 2881 matching lines @@
   uintptr_t mem_start = reinterpret_cast<uintptr_t>(
       module_->instance ? module_->instance->mem_start : nullptr);
   if (offset == 0) {
     if (!mem_buffer_) {
       mem_buffer_ = jsgraph()->RelocatableIntPtrConstant(
           mem_start, RelocInfo::WASM_MEMORY_REFERENCE);
     }
     return mem_buffer_;
   } else {
     return jsgraph()->RelocatableIntPtrConstant(
-        static_cast<uintptr_t>(mem_start + offset),
-        RelocInfo::WASM_MEMORY_REFERENCE);
+        mem_start + offset, RelocInfo::WASM_MEMORY_REFERENCE);
   }
 }
 
 Node* WasmGraphBuilder::CurrentMemoryPages() {
   // CurrentMemoryPages can not be called from asm.js.
   DCHECK_EQ(wasm::kWasmOrigin, module_->module->get_origin());
   Node* call =
       BuildCallToRuntime(Runtime::kWasmMemorySize, jsgraph(), centry_stub_node_,
                          nullptr, 0, effect_, control_);
   Node* result = BuildChangeSmiToInt32(call);
@@ skipping 1170 matching lines @@
     wasm::ErrorThrower* thrower, Isolate* isolate,
     wasm::ModuleBytesEnv* module_env, const wasm::WasmFunction* function) {
   WasmCompilationUnit unit(isolate, module_env, function);
   unit.ExecuteCompilation();
   return unit.FinishCompilation(thrower);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8