[turbofan] Introduce integer multiplication with overflow.

src/compiler/arm/code-generator-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/compiler/code-generator.h"
 
 #include "src/arm/macro-assembler-arm.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
@@ skipping 845 matching lines @@
       __ mla(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
              i.InputRegister(2), i.OutputSBit());
       break;
     case kArmMls: {
       CpuFeatureScope scope(masm(), ARMv7);
       __ mls(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
              i.InputRegister(2));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
+    case kArmSmull:
+      __ smull(i.OutputRegister(0), i.OutputRegister(1), i.InputRegister(0),
+               i.InputRegister(1));
+      break;
     case kArmSmmul:
       __ smmul(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     case kArmSmmla:
       __ smmla(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1),
                i.InputRegister(2));
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     case kArmUmull:
@@ skipping 1061 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8