Inline Array.prototype.forEach in TurboFan

src/builtins/ia32/builtins-ia32.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1444 matching lines @@
 }
 
 void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) {
   Generate_NotifyStubFailureHelper(masm, kDontSaveFPRegs);
 }
 
 void Builtins::Generate_NotifyStubFailureSaveDoubles(MacroAssembler* masm) {
   Generate_NotifyStubFailureHelper(masm, kSaveFPRegs);
 }
 
+void Builtins::Generate_NotifyBuiltinContinuation(MacroAssembler* masm) {
+  // Enter an internal frame.
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    // Preserve possible return result from lazy deopt.
+    __ push(eax);
+    __ CallRuntime(Runtime::kNotifyStubFailure, false);
+    __ pop(eax);
+    // Tear down internal frame.
+  }
+
+  __ pop(MemOperand(esp, 0));  // Ignore state offset
+  __ ret(0);  // Return to ContinueToBuiltin stub still on stack.
+}
+
+namespace {
+void Generate_ContinueToBuiltinHelper(MacroAssembler* masm,
+                                      bool java_script_builtin,
+                                      bool with_result) {
+  const RegisterConfiguration* config(RegisterConfiguration::Turbofan());
+  int allocatable_register_count = config->num_allocatable_general_registers();
+  if (with_result) {
+    // Overwrite the hole inserted by the deoptimizer with the return value from
+    // the LAZY deopt point.
+    __ mov(Operand(esp,
+                   config->num_allocatable_general_registers() * kPointerSize +
+                       BuiltinContinuationFrameConstants::kFixedFrameSize),
+           eax);
+  }
+  for (int i = allocatable_register_count - 1; i >= 0; --i) {
+    int code = config->GetAllocatableGeneralCode(i);
+    __ pop(Register::from_code(code));
+    if (java_script_builtin && code == kJavaScriptCallArgCountRegister.code()) {
+      __ SmiUntag(Register::from_code(code));
+    }
+  }
+  __ mov(
+      ebp,
+      Operand(esp, BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp));
+  const int offsetToPC =
+      BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp - kPointerSize;
+  __ pop(Operand(esp, offsetToPC));
+  __ Drop(offsetToPC / kPointerSize);
+  __ add(Operand(esp, 0), Immediate(Code::kHeaderSize - kHeapObjectTag));
+  __ ret(0);
+}
+}  // namespace
+
+void Builtins::Generate_ContinueToCodeStubBuiltin(MacroAssembler* masm) {
+  Generate_ContinueToBuiltinHelper(masm, false, false);
+}
+
+void Builtins::Generate_ContinueToCodeStubBuiltinWithResult(
+    MacroAssembler* masm) {
+  Generate_ContinueToBuiltinHelper(masm, false, true);
+}
+
+void Builtins::Generate_ContinueToJavaScriptBuiltin(MacroAssembler* masm) {
+  Generate_ContinueToBuiltinHelper(masm, true, false);
+}
+
+void Builtins::Generate_ContinueToJavaScriptBuiltinWithResult(
+    MacroAssembler* masm) {
+  Generate_ContinueToBuiltinHelper(masm, true, true);
+}
+
 static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
                                              Deoptimizer::BailoutType type) {
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
 
     // Pass deoptimization type to the runtime system.
     __ push(Immediate(Smi::FromInt(static_cast<int>(type))));
     __ CallRuntime(Runtime::kNotifyDeoptimized);
 
     // Tear down internal frame.
@@ skipping 1850 matching lines @@
   }
   // Now jump to the instructions of the returned code object.
   __ jmp(edi);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_IA32