[Interpreter] Support compiling for baseline on return from interpreted function.

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 76d0640bc9a303003be8dd0bbd44514a35f37fec..530e8116166a17954bb5b47078a4d722036f467a 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -952,6 +952,22 @@ void Builtins::Generate_ResumeGeneratorTrampoline(MacroAssembler* masm) {
   }
 }
 
+static void LeaveInterpreterFrame(MacroAssembler* masm, Register scratch) {
+  Register args_count = scratch;
+
+  // Get the arguments + receiver count.
+  __ lw(args_count,
+        MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
+  __ lw(args_count,
+        FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset));
+
+  // Leave the frame (also dropping the register file).
+  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
+
+  // Drop receiver + arguments.
+  __ Addu(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
@@ -1054,16 +1070,7 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset());
 
   // The return value is in v0.
-
-  // Get the arguments + reciever count.
-  __ lw(t0, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
-  __ lw(t0, FieldMemOperand(t0, BytecodeArray::kParameterSizeOffset));
-
-  // Leave the frame (also dropping the register file).
-  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
-
-  // Drop receiver + arguments and return.
-  __ Addu(sp, sp, t0);
+  LeaveInterpreterFrame(masm, t0);
   __ Jump(ra);
 
   // Load debug copy of the bytecode array.
@@ -1085,6 +1092,31 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   __ Jump(t0);
 }
 
+void Builtins::Generate_InterpreterMarkBaselineOnReturn(MacroAssembler* masm) {
+  // Save the function and context for call to CompileBaseline.
+  __ lw(a1, MemOperand(fp, StandardFrameConstants::kFunctionOffset));
+  __ lw(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, t0);
+
+  {
+    FrameScope frame_scope(masm, StackFrame::INTERNAL);
+    // Push return value.
+    __ push(v0);
+
+    // Push function as argument and compile for baseline.
+    __ push(a1);
+    __ CallRuntime(Runtime::kCompileBaseline);
+
+    // Restore return value.
+    __ pop(v0);
+  }
+  __ Jump(ra);
+}
+
 // static
 void Builtins::Generate_InterpreterPushArgsAndCallImpl(
     MacroAssembler* masm, TailCallMode tail_call_mode) {