[es6] [interpreter] Add tail calls support to Ignition.

src/mips/builtins-mips.cc

Index: src/mips/builtins-mips.cc
diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
index 035795ad24074add2da7a59eaa0517ec64dc7735..5503312d0d65d87ed2566f3fd0111d703bf3cc90 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -1076,7 +1076,8 @@ void Builtins::Generate_InterpreterExitTrampoline(MacroAssembler* masm) {
 
 
 // static
-void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
+void Builtins::Generate_InterpreterPushArgsAndCallImpl(
+    MacroAssembler* masm, TailCallMode tail_call_mode) {
   // ----------- S t a t e -------------
   //  -- a0 : the number of arguments (not including the receiver)
   //  -- a2 : the address of the first argument to be pushed. Subsequent
@@ -1101,7 +1102,9 @@ void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
   __ Branch(&loop_header, gt, a2, Operand(a3));
 
   // Call the target.
-  __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
+  __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny,
+                                            tail_call_mode),
+          RelocInfo::CODE_TARGET);
 }
 
 
@@ -2082,6 +2085,16 @@ void PrepareForTailCall(MacroAssembler* masm, Register args_reg,
   __ lb(scratch1, MemOperand(at));
   __ Branch(&done, ne, scratch1, Operand(zero_reg));
 
+  // Drop possible interpreter handler/stub frame.
+  {
+    Label no_interpreter_frame;
+    __ lw(scratch3, MemOperand(fp, StandardFrameConstants::kMarkerOffset));
+    __ Branch(&no_interpreter_frame, ne, scratch3,
+              Operand(Smi::FromInt(StackFrame::STUB)));
+    __ lw(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
+    __ bind(&no_interpreter_frame);
+  }
+
   // Check if next frame is an arguments adaptor frame.
   Label no_arguments_adaptor, formal_parameter_count_loaded;
   __ lw(scratch2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));