[compiler] Make SFI "optimize" flag a "tier up" flag

src/builtins/mips/builtins-mips.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_MIPS
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1463 matching lines @@
 
   // We found neither literals nor code.
   __ jmp(&gotta_call_runtime);
 
   __ bind(&try_shared);
   __ pop(closure);
   __ pop(new_target);
   __ pop(argument_count);
   __ lw(entry, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
   // Is the shared function marked for optimization?
-  __ lbu(t1,
-         FieldMemOperand(
-             entry, SharedFunctionInfo::kWasMarkedForOptimizationByteOffset));
-  __ And(
-      t1, t1,
-      Operand(1 << SharedFunctionInfo::kWasMarkedForOptimizationBitWithinByte));
+  __ lbu(t1, FieldMemOperand(
+                 entry, SharedFunctionInfo::kWasMarkedForTierUpByteOffset));
+  __ And(t1, t1,
+         Operand(1 << SharedFunctionInfo::kWasMarkedForTierUpBitWithinByte));
   __ Branch(&gotta_call_runtime_no_stack, ne, t1, Operand(zero_reg));
   // Is the full code valid?
   __ lw(entry, FieldMemOperand(entry, SharedFunctionInfo::kCodeOffset));
   __ lw(t1, FieldMemOperand(entry, Code::kFlagsOffset));
   __ And(t1, t1, Operand(Code::KindField::kMask));
   __ srl(t1, t1, Code::KindField::kShift);
   __ Branch(&gotta_call_runtime_no_stack, eq, t1, Operand(Code::BUILTIN));
   // Yes, install the full code.
   __ Addu(entry, entry, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ sw(entry, FieldMemOperand(closure, JSFunction::kCodeEntryOffset));
@@ skipping 1490 matching lines @@
     __ break_(0xCC);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS