Inline Array.prototype.forEach in TurboFan

src/builtins/x64/builtins-x64.cc

Index: src/builtins/x64/builtins-x64.cc
diff --git a/src/builtins/x64/builtins-x64.cc b/src/builtins/x64/builtins-x64.cc
index d4fb131afc79142508d97533d7f82ee3096de2f3..d74e57b0cf8a88b98d58168ec90f2fd5f253f9e3 100644
--- a/src/builtins/x64/builtins-x64.cc
+++ b/src/builtins/x64/builtins-x64.cc
@@ -1425,6 +1425,72 @@ 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.
+    __ pushq(rax);
+    __ CallRuntime(Runtime::kNotifyStubFailure, false);
+    __ popq(rax);
+    // Tear down internal frame.
+  }
+
+  __ DropUnderReturnAddress(1);  // 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.
+    __ movq(Operand(rsp,
+                    config->num_allocatable_general_registers() * kPointerSize +
+                        BuiltinContinuationFrameConstants::kFixedFrameSize),
+            rax);
+  }
+  for (int i = allocatable_register_count - 1; i >= 0; --i) {
+    int code = config->GetAllocatableGeneralCode(i);
+    __ popq(Register::from_code(code));
+    if (java_script_builtin && code == kJavaScriptCallArgCountRegister.code()) {
+      __ SmiToInteger32(Register::from_code(code), Register::from_code(code));
+    }
+  }
+  __ movq(
+      rbp,
+      Operand(rsp, BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp));
+  const int offsetToPC =
+      BuiltinContinuationFrameConstants::kFixedFrameSizeFromFp - kPointerSize;
+  __ popq(Operand(rsp, offsetToPC));
+  __ Drop(offsetToPC / kPointerSize);
+  __ addq(Operand(rsp, 0), Immediate(Code::kHeaderSize - kHeapObjectTag));
+  __ Ret();
+}
+}  // 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) {
   // Enter an internal frame.