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

src/full-codegen/arm/full-codegen-arm.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_ARM
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 653 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());
-  __ tst(result_register(), result_register());
-  Split(ne, if_true, if_false, fall_through);
+  __ CompareRoot(result_register(), Heap::kTrueValueRootIndex);
+  Split(eq, if_true, if_false, fall_through);
 }
 
 
 void FullCodeGenerator::Split(Condition cond,
                               Label* if_true,
                               Label* if_false,
                               Label* fall_through) {
   if (if_false == fall_through) {
     __ b(cond, if_true);
   } else if (if_true == fall_through) {
@@ skipping 1373 matching lines @@
       __ bind(&l_loop);
       __ Move(load_receiver, r0);
 
       __ push(load_receiver);                               // save result
       __ LoadRoot(load_name, Heap::kdone_stringRootIndex);  // "done"
       __ mov(LoadDescriptor::SlotRegister(),
              Operand(SmiFromSlot(expr->DoneFeedbackSlot())));
       CallLoadIC(NOT_INSIDE_TYPEOF);  // r0=result.done
       Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate());
       CallIC(bool_ic);
-      __ cmp(r0, Operand(0));
-      __ b(eq, &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(),
              Operand(SmiFromSlot(expr->ValueFeedbackSlot())));
       CallLoadIC(NOT_INSIDE_TYPEOF);                         // r0=result.value
       context()->DropAndPlug(2, r0);                         // drop iter and g
       break;
     }
@@ skipping 2892 matching lines @@
   DCHECK(interrupt_address ==
          isolate->builtins()->OsrAfterStackCheck()->entry());
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM