Revert of [arm] Fix recognition of VNEG.

test/unittests/compiler/arm/instruction-selector-arm-unittest.cc

 // Copyright 2014 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.
 
 #include <limits>
 
 #include "test/unittests/compiler/instruction-selector-unittest.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 1464 matching lines @@
 
 INSTANTIATE_TEST_CASE_P(InstructionSelectorTest,
                         InstructionSelectorComparisonTest,
                         ::testing::ValuesIn(kComparisons));
 
 
 // -----------------------------------------------------------------------------
 // Miscellaneous.
 
 
-TEST_F(InstructionSelectorTest, Float64SubWithMinusZero) {
-  StreamBuilder m(this, kMachFloat64, kMachFloat64);
-  Node* const p0 = m.Parameter(0);
-  Node* const n = m.Float64Sub(m.Float64Constant(-0.0), p0);
-  m.Return(n);
-  Stream s = m.Build();
-  ASSERT_EQ(1U, s.size());
-  EXPECT_EQ(kArmVnegF64, s[0]->arch_opcode());
-  ASSERT_EQ(1U, s[0]->InputCount());
-  EXPECT_EQ(s.ToVreg(p0), s.ToVreg(s[0]->InputAt(0)));
-  ASSERT_EQ(1U, s[0]->OutputCount());
-  EXPECT_EQ(s.ToVreg(n), s.ToVreg(s[0]->Output()));
-}
-
-
 TEST_F(InstructionSelectorTest, Int32AddWithInt32Mul) {
   {
     StreamBuilder m(this, kMachInt32, kMachInt32, kMachInt32, kMachInt32);
     Node* const p0 = m.Parameter(0);
     Node* const p1 = m.Parameter(1);
     Node* const p2 = m.Parameter(2);
     Node* const n = m.Int32Add(p0, m.Int32Mul(p1, p2));
     m.Return(n);
     Stream s = m.Build();
     ASSERT_EQ(1U, s.size());
@@ skipping 833 matching lines @@
       ASSERT_EQ(3U, s[0]->InputCount());
       EXPECT_EQ(lsb, s.ToInt32(s[0]->InputAt(1)));
       EXPECT_EQ(width, s.ToInt32(s[0]->InputAt(2)));
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8