[turbofan] Desugar JSUnaryNot(x) to Select(x, false, true).

src/full-codegen/arm64/full-codegen-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/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 656 matching lines @@
   }
 }
 
 
 void FullCodeGenerator::DoTest(Expression* condition,
                                Label* if_true,
                                Label* if_false,
                                Label* fall_through) {
   Handle<Code> ic = ToBooleanStub::GetUninitialized(isolate());
   CallIC(ic, condition->test_id());
-  __ CompareAndSplit(result_register(), 0, ne, if_true, if_false, fall_through);
+  __ CompareRoot(result_register(), Heap::kTrueValueRootIndex);
+  Split(eq, if_true, if_false, fall_through);
 }
 
 
 // If (cond), branch to if_true.
 // If (!cond), branch to if_false.
 // fall_through is used as an optimization in cases where only one branch
 // instruction is necessary.
 void FullCodeGenerator::Split(Condition cond,
                               Label* if_true,
                               Label* if_false,
@@ skipping 3914 matching lines @@
       __ Move(load_receiver, x0);
 
       __ Push(load_receiver);                               // save result
       __ LoadRoot(load_name, Heap::kdone_stringRootIndex);  // "done"
       __ Mov(LoadDescriptor::SlotRegister(),
              SmiFromSlot(expr->DoneFeedbackSlot()));
       CallLoadIC(NOT_INSIDE_TYPEOF);  // x0=result.done
       // The ToBooleanStub argument (result.done) is in x0.
       Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate());
       CallIC(bool_ic);
-      __ Cbz(x0, &l_try);
+      __ CompareRoot(result_register(), Heap::kTrueValueRootIndex);
+      __ B(ne, &l_try);
 
       // result.value
       __ Pop(load_receiver);                                 // result
       __ LoadRoot(load_name, Heap::kvalue_stringRootIndex);  // "value"
       __ Mov(LoadDescriptor::SlotRegister(),
              SmiFromSlot(expr->ValueFeedbackSlot()));
       CallLoadIC(NOT_INSIDE_TYPEOF);                         // x0=result.value
       context()->DropAndPlug(2, x0);                         // drop iter and g
       break;
     }
@@ skipping 328 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64