[wasm] Introduce performance testing options.

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/isolate-inl.h"
 
@@ skipping 394 matching lines @@
 Node* WasmGraphBuilder::Int32Constant(int32_t value) {
   return jsgraph()->Int32Constant(value);
 }
 
 Node* WasmGraphBuilder::Int64Constant(int64_t value) {
   return jsgraph()->Int64Constant(value);
 }
 
 void WasmGraphBuilder::StackCheck(wasm::WasmCodePosition position,
                                   Node** effect, Node** control) {
+  if (FLAG_wasm_no_stack_checks) return;
   if (effect == nullptr) {
     effect = effect_;
   }
   if (control == nullptr) {
     control = control_;
   }
   // We do not generate stack checks for cctests.
   if (module_ && !module_->instance->context.is_null()) {
     Node* limit = graph()->NewNode(
         jsgraph()->machine()->Load(MachineType::Pointer()),
@@ skipping 2463 matching lines @@
   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,
                                       wasm::WasmCodePosition position) {
   DCHECK(module_ && module_->instance);
+  if (FLAG_wasm_no_bounds_checks) return;
   uint32_t size = module_->instance->mem_size;
   byte memsize = wasm::WasmOpcodes::MemSize(memtype);
 
   size_t effective_size;
   if (size <= offset || size < (static_cast<uint64_t>(offset) + memsize)) {
     // Two checks are needed in the case where the offset is statically
     // out of bounds; one check for the offset being in bounds, and the next for
     // the offset + index being out of bounds for code to be patched correctly
     // on relocation.
 
@@ skipping 578 matching lines @@
                             function_->code_start_offset),
            compile_ms);
   }
 
   return code;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8