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

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
index 031b483cca13474be4dca6f4f1e2b9645d5880ea..4d855004944e78f1ae58311f22d5f31725478812 100644
--- a/src/arm/builtins-arm.cc
+++ b/src/arm/builtins-arm.cc
@@ -959,6 +959,22 @@ 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,
+         FieldMemOperand(args_count, BytecodeArray::kParameterSizeOffset));
+
+  // Leave the frame (also dropping the register file).
+  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
+
+  // Drop receiver + arguments.
+  __ add(sp, sp, args_count, LeaveCC);
+}
+
 // 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
@@ -1062,15 +1078,7 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   masm->isolate()->heap()->SetInterpreterEntryReturnPCOffset(masm->pc_offset());
 
   // The return value is in r0.
-
-  // Get the arguments + reciever count.
-  __ ldr(r2, MemOperand(fp, InterpreterFrameConstants::kBytecodeArrayFromFp));
-  __ ldr(r2, FieldMemOperand(r2, BytecodeArray::kParameterSizeOffset));
-
-  // Leave the frame (also dropping the register file).
-  __ LeaveFrame(StackFrame::JAVA_SCRIPT);
-
-  __ add(sp, sp, r2, LeaveCC);
+  LeaveInterpreterFrame(masm, r2);
   __ Jump(lr);
 
   // If the bytecode array is no longer present, then the underlying function
@@ -1086,6 +1094,31 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   __ Jump(r4);
 }
 
+void Builtins::Generate_InterpreterMarkBaselineOnReturn(MacroAssembler* masm) {
+  // Save the function and context for call to CompileBaseline.
+  __ ldr(r1, 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, r2);
+
+  {
+    FrameScope frame_scope(masm, StackFrame::INTERNAL);
+    // Push return value.
+    __ push(r0);
+
+    // Push function as argument and compile for baseline.
+    __ push(r1);
+    __ CallRuntime(Runtime::kCompileBaseline);
+
+    // Restore return value.
+    __ pop(r0);
+  }
+  __ Jump(lr);
+}
+
 static void Generate_InterpreterPushArgs(MacroAssembler* masm, Register index,
                                          Register limit, Register scratch) {
   Label loop_header, loop_check;