[wasm] Relocatable Globals

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 "src/isolate-inl.h"
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/base/platform/platform.h"
@@ skipping 2531 matching lines @@
 Node* WasmGraphBuilder::FunctionTable() {
   DCHECK(module_ && module_->instance &&
          !module_->instance->function_table.is_null());
   if (!function_table_) {
     function_table_ = HeapConstant(module_->instance->function_table);
   }
   return function_table_;
 }
 
 Node* WasmGraphBuilder::LoadGlobal(uint32_t index) {
-  DCHECK(module_ && module_->instance && module_->instance->globals_start);
   MachineType mem_type = module_->GetGlobalType(index);
-  Node* addr = jsgraph()->IntPtrConstant(
+  Node* addr = jsgraph()->RelocatableIntPtrConstant(
       reinterpret_cast<uintptr_t>(module_->instance->globals_start +
-                                  module_->module->globals[index].offset));
+                                  module_->module->globals[index].offset),
+      RelocInfo::WASM_GLOBAL_REFERENCE);
   const Operator* op = jsgraph()->machine()->Load(mem_type);
   Node* node = graph()->NewNode(op, addr, jsgraph()->Int32Constant(0), *effect_,
                                 *control_);
   *effect_ = node;
   return node;
 }
 
 Node* WasmGraphBuilder::StoreGlobal(uint32_t index, Node* val) {
-  DCHECK(module_ && module_->instance && module_->instance->globals_start);
   MachineType mem_type = module_->GetGlobalType(index);
-  Node* addr = jsgraph()->IntPtrConstant(
+  Node* addr = jsgraph()->RelocatableIntPtrConstant(
       reinterpret_cast<uintptr_t>(module_->instance->globals_start +
-                                  module_->module->globals[index].offset));
+                                  module_->module->globals[index].offset),
+      RelocInfo::WASM_GLOBAL_REFERENCE);
   const Operator* op = jsgraph()->machine()->Store(
       StoreRepresentation(mem_type.representation(), kNoWriteBarrier));
   Node* node = graph()->NewNode(op, addr, jsgraph()->Int32Constant(0), val,
                                 *effect_, *control_);
   *effect_ = node;
   return node;
 }
 
 void WasmGraphBuilder::BoundsCheckMem(MachineType memtype, Node* index,
                                       uint32_t offset,
@@ skipping 706 matching lines @@
                             function_->code_start_offset),
            compile_ms);
   }
 
   return code;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8