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

src/ppc/builtins-ppc.cc

 // Copyright 2014 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_PPC
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1072 matching lines @@
   __ addi(index, index, Operand(kPointerSize));  // Bias up for LoadPU
   __ mtctr(count);
   __ bind(&loop);
   __ LoadPU(scratch, MemOperand(index, -kPointerSize));
   __ push(scratch);
   __ bdnz(&loop);
 }
 
 
 // static
-void Builtins::Generate_InterpreterPushArgsAndCall(MacroAssembler* masm) {
+void Builtins::Generate_InterpreterPushArgsAndCallImpl(
+    MacroAssembler* masm, TailCallMode tail_call_mode) {
   // ----------- S t a t e -------------
   //  -- r3 : the number of arguments (not including the receiver)
   //  -- r5 : the address of the first argument to be pushed. Subsequent
   //          arguments should be consecutive above this, in the same order as
   //          they are to be pushed onto the stack.
   //  -- r4 : the target to call (can be any Object).
   // -----------------------------------
 
   // Calculate number of arguments (add one for receiver).
   __ addi(r6, r3, Operand(1));
 
   // Push the arguments.
   Generate_InterpreterPushArgs(masm, r5, r6, r7);
 
   // Call the target.
-  __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
+  __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny,
+                                            tail_call_mode),
+          RelocInfo::CODE_TARGET);
 }
 
 
 // static
 void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   // -- r3 : argument count (not including receiver)
   // -- r6 : new target
   // -- r4 : constructor to call
   // -- r5 : address of the first argument
@@ skipping 978 matching lines @@
 
   // Prepare for tail call only if the debugger is not active.
   Label done;
   ExternalReference debug_is_active =
       ExternalReference::debug_is_active_address(masm->isolate());
   __ mov(scratch1, Operand(debug_is_active));
   __ lbz(scratch1, MemOperand(scratch1));
   __ cmpi(scratch1, Operand::Zero());
   __ bne(&done);
 
+  // Drop possible interpreter handler/stub frame.
+  {
+    Label no_interpreter_frame;
+    __ LoadP(scratch3, MemOperand(fp, StandardFrameConstants::kMarkerOffset));
+    __ CmpSmiLiteral(scratch3, Smi::FromInt(StackFrame::STUB), r0);
+    __ bne(&no_interpreter_frame);
+    __ LoadP(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;
   __ LoadP(scratch2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
   __ LoadP(scratch3,
            MemOperand(scratch2, StandardFrameConstants::kContextOffset));
   __ CmpSmiLiteral(scratch3, Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR), r0);
   __ bne(&no_arguments_adaptor);
 
   // Drop arguments adaptor frame and load arguments count.
   __ mr(fp, scratch2);
@@ skipping 629 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC