[turbofan] fix deopt's input life span

src/compiler/arm/instruction-selector-arm.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 "src/base/adapters.h"
 #include "src/base/bits.h"
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties.h"
 
@@ skipping 234 matching lines @@
     opcode |= AddressingModeField::encode(kMode_Operand2_R);
     inputs[input_count++] = g.UseRegister(m.left().node());
     inputs[input_count++] = g.UseRegister(m.right().node());
   }
 
   if (cont->IsBranch()) {
     inputs[input_count++] = g.Label(cont->true_block());
     inputs[input_count++] = g.Label(cont->false_block());
   }
 
-  if (cont->IsDeoptimize()) {
-    // If we can deoptimize as a result of the binop, we need to make sure that
-    // the deopt inputs are not overwritten by the binop result. One way
-    // to achieve that is to declare the output register as same-as-first.
-    outputs[output_count++] = g.DefineSameAsFirst(node);
-  } else {
-    outputs[output_count++] = g.DefineAsRegister(node);
-  }
+  outputs[output_count++] = g.DefineAsRegister(node);
   if (cont->IsSet()) {
     outputs[output_count++] = g.DefineAsRegister(cont->result());
   }
 
   DCHECK_NE(0u, input_count);
   DCHECK_NE(0u, output_count);
   DCHECK_GE(arraysize(inputs), input_count);
   DCHECK_GE(arraysize(outputs), output_count);
   DCHECK_NE(kMode_None, AddressingModeField::decode(opcode));
 
@@ skipping 1985 matching lines @@
   Vector<MachineType> req_aligned = Vector<MachineType>::New(2);
   req_aligned[0] = MachineType::Float32();
   req_aligned[1] = MachineType::Float64();
   return MachineOperatorBuilder::AlignmentRequirements::
       SomeUnalignedAccessUnsupported(req_aligned, req_aligned);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8