PPC/S390: [Interpreter] Support compiling for baseline on return from interpreted function.

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 950 matching lines @@
 
 void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
   Generate_JSEntryTrampolineHelper(masm, false);
 }
 
 
 void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
   Generate_JSEntryTrampolineHelper(masm, true);
 }
 
+static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch) {
+  Register args_count = scratch;
+
+  // Get the arguments + receiver count.
+  __ LoadP(args_count,
+           MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
+  __ lwz(args_count,
+         FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset));
+
+  // Leave the frame (also dropping the register file).
+  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
+
+  __ add(sp, sp, args_count);
+}
 
 // Generate code for entering a JS function with the interpreter.
 // On entry to the function the receiver and arguments have been pushed on the
 // stack left to right.  The actual argument count matches the formal parameter
 // count expected by the function.
 //
 // The live registers are:
 //   o r4: the JS function object being called.
 //   o r6: the new target
 //   o cp: our context
@@ skipping 89 matching lines @@
   // Dispatch to the first bytecode handler for the function.
   __ lbzx(r4, MemOperand(kInterpreterBytecodeArrayRegister,
                          kInterpreterBytecodeOffsetRegister));
   __ ShiftLeftImm(ip, r4, Operand(kPointerSizeLog2));
   __ LoadPX(ip, MemOperand(kInterpreterDispatchTableRegister, ip));
   __ Call(ip);
 
   masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset());
 
   // The return value is in r3.
-
-  // Get the arguments + reciever count.
-  __ LoadP(r5, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
-  __ lwz(r5, FieldMemOperand(r5, BytecodeArray::kParameterSizeOffset));
-
-  // Leave the frame (also dropping the register file).
-  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
-
-  __ add(sp, sp, r5);
+  LeaveInterpreterFrame(masm, r5);
   __ blr();
 
   // If the bytecode array is no longer present, then the underlying function
   // has been switched to a different kind of code and we heal the closure by
   // switching the code entry field over to the new code object as well.
   __ bind(&bytecode_array_not_present);
   __ LeaveFrame(StackFrame::JAVA_SCRIPT);
   __ LoadP(r7, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
   __ LoadP(r7, FieldMemOperand(r7, SharedFunctionInfo::kCodeOffset));
   __ addi(r7, r7, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ StoreP(r7, FieldMemOperand(r4, JSFunction::kCodeEntryOffset), r0);
   __ RecordWriteCodeEntryField(r4, r7, r8);
   __ JumpToJSEntry(r7);
 }
 
+void Builtins::Generate_InterpreterMarkBaselineOnReturn(MacroAssembler* masm) {
+  // Save the function and context for call to CompileBaseline.
+  __ LoadP(r4, MemOperand(fp, StandardFrameConstants::kFunctionOffset));
+  __ LoadP(kContextRegister,
+           MemOperand(fp, StandardFrameConstants::kContextOffset));
+
+  // Leave the frame before recompiling for baseline so that we don't count as
+  // an activation on the stack.
+  LeaveInterpreterFrame(masm, r5);
+
+  {
+    FrameScope frame_scope(masm, StackFrame::INTERNAL);
+    // Push return value.
+    __ push(r3);
+
+    // Push function as argument and compile for baseline.
+    __ push(r4);
+    __ CallRuntime(Runtime::kCompileBaseline);
+
+    // Restore return value.
+    __ pop(r3);
+  }
+  __ blr();
+}
 
 static void Generate_InterpreterPushArgs(MacroAssembler* masm, Register index,
                                          Register count, Register scratch) {
   Label loop;
   __ addi(index, index, Operand(kPointerSize));  // Bias up for LoadPU
   __ mtctr(count);
   __ bind(&loop);
   __ LoadPU(scratch, MemOperand(index, -kPointerSize));
   __ push(scratch);
   __ bdnz(&loop);
@@ skipping 1712 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC