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

src/arm64/builtins-arm64.cc

Index: src/arm64/builtins-arm64.cc
diff --git a/src/arm64/builtins-arm64.cc b/src/arm64/builtins-arm64.cc
index be372e65a674e8856bcf981b0aaef97f30b00d45..67a354e35c57734793e9b1966c704fc18502dcc3 100644
--- a/src/arm64/builtins-arm64.cc
+++ b/src/arm64/builtins-arm64.cc
@@ -963,6 +963,22 @@ 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.
+  __ ldr(args_count,
+         MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
+  __ Ldr(args_count.W(),
+         FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset));
+
+  // Leave the frame (also dropping the register file).
+  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
+
+  // Drop receiver + arguments.
+  __ Drop(args_count, 1);
+}
+
 // 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
@@ -1064,16 +1080,7 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset());
 
   // The return value is in x0.
-
-  // Get the arguments + reciever count.
-  __ ldr(x1, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
-  __ Ldr(w1, FieldMemOperand(x1, BytecodeArray::kParameterSizeOffset));
-
-  // Leave the frame (also dropping the register file).
-  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
-
-  // Drop receiver + arguments and return.
-  __ Drop(x1, 1);
+  LeaveInterpreterFrame(masm, x2);
   __ Ret();
 
   // Load debug copy of the bytecode array.
@@ -1095,6 +1102,31 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   __ Jump(x7);
 }
 
+void Builtins::Generate_InterpreterMarkBaselineOnReturn(MacroAssembler* masm) {
+  // Save the function and context for call to CompileBaseline.
+  __ ldr(x1, MemOperand(fp, StandardFrameConstants::kFunctionOffset));
+  __ ldr(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, x2);
+
+  {
+    FrameScope frame_scope(masm, StackFrame::INTERNAL);
+    // Push return value.
+    __ push(x0);
+
+    // Push function as argument and compile for baseline.
+    __ push(x1);
+    __ CallRuntime(Runtime::kCompileBaseline);
+
+    // Restore return value.
+    __ pop(x0);
+  }
+  __ Ret();
+}
+
 // static
 void Builtins::Generate_InterpreterPushArgsAndCallImpl(
     MacroAssembler* masm, TailCallMode tail_call_mode) {