[builtins] CompileLazy bailed out to the runtime entirely too often.

src/builtins/arm64/builtins-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 1339 matching lines @@
   // Do we have a valid feedback vector?
   __ Ldr(index, FieldMemOperand(closure, JSFunction::kLiteralsOffset));
   __ Ldr(index, FieldMemOperand(index, LiteralsArray::kFeedbackVectorOffset));
   __ JumpIfRoot(index, Heap::kUndefinedValueRootIndex, &gotta_call_runtime);
 
   __ Ldr(map, FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
   __ Ldr(map,
          FieldMemOperand(map, SharedFunctionInfo::kOptimizedCodeMapOffset));
   __ Ldrsw(index, UntagSmiFieldMemOperand(map, FixedArray::kLengthOffset));
   __ Cmp(index, Operand(2));
-  __ B(lt, &gotta_call_runtime);
+  __ B(lt, &try_shared);
 
   // x3  : native context
   // x2  : length / index
   // x13 : optimized code map
   // stack[0] : new target
   // stack[4] : closure
   Register native_context = x4;
   __ Ldr(native_context, NativeContextMemOperand());
 
   __ Bind(&loop_top);
@@ skipping 38 matching lines @@
   __ Mov(x5, closure);
   __ RecordWriteContextSlot(native_context, function_list_offset, x5, x13,
                             kLRHasNotBeenSaved, kDontSaveFPRegs);
   __ Jump(entry);
 
   __ Bind(&loop_bottom);
   __ Sub(index, index, Operand(SharedFunctionInfo::kEntryLength));
   __ Cmp(index, Operand(1));
   __ B(gt, &loop_top);
 
-  // We found no code.
-  __ B(&gotta_call_runtime);
-
+  // We found no code. Try the SharedFunctionInfo.
   __ Bind(&try_shared);
   __ Ldr(entry,
          FieldMemOperand(closure, JSFunction::kSharedFunctionInfoOffset));
   // Is the shared function marked for tier up?
   __ Ldrb(temp, FieldMemOperand(
                     entry, SharedFunctionInfo::kMarkedForTierUpByteOffset));
   __ TestAndBranchIfAnySet(
       temp, 1 << SharedFunctionInfo::kMarkedForTierUpBitWithinByte,
       &gotta_call_runtime);
 
@@ skipping 1559 matching lines @@
     __ Unreachable();
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM