[Ignition] Teach CompileLazy about interpreted functions.

src/builtins/mips64/builtins-mips64.cc

 // Copyright 2012 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_MIPS64
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1425 matching lines @@
   __ pop(closure);
   __ pop(new_target);
   __ pop(argument_count);
   __ ld(entry, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
   // Is the shared function marked for tier up?
   __ lbu(a5, FieldMemOperand(entry,
                              SharedFunctionInfo::kMarkedForTierUpByteOffset));
   __ And(a5, a5,
          Operand(1 << SharedFunctionInfo::kMarkedForTierUpBitWithinByte));
   __ Branch(&gotta_call_runtime_no_stack, ne, a5, Operand(zero_reg));
-  // Is the full code valid?
+
+  // If SFI points to anything other than CompileLazy, install that.
   __ ld(entry, FieldMemOperand(entry, SharedFunctionInfo::kCodeOffset));
-  __ lw(a5, FieldMemOperand(entry, Code::kFlagsOffset));
-  __ And(a5, a5, Operand(Code::KindField::kMask));
-  __ dsrl(a5, a5, Code::KindField::kShift);
-  __ Branch(&gotta_call_runtime_no_stack, eq, a5, Operand(Code::BUILTIN));
-  // Yes, install the full code.
+  __ Move(t1, masm->CodeObject());
+  __ Branch(&gotta_call_runtime_no_stack, eq, entry, Operand(t1));
+
+  // Install the SFI's code entry.
   __ Daddu(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ sd(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset));
   __ RecordWriteCodeEntryField(closure, entry, a5);
   __ Jump(entry);
 
   __ bind(&gotta_call_runtime);
   __ pop(closure);
   __ pop(new_target);
   __ pop(argument_count);
   __ bind(&gotta_call_runtime_no_stack);
@@ skipping 1534 matching lines @@
     __ break_(0xCC);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64