[turbofan] Implementation of Word32PairShl on arm.

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 725 matching lines @@
       DCHECK_EQ(SetCC, i.OutputSBit());
       break;
     case kArmTst:
       __ tst(i.InputRegister(0), i.InputOperand2(1));
       DCHECK_EQ(SetCC, i.OutputSBit());
       break;
     case kArmTeq:
       __ teq(i.InputRegister(0), i.InputOperand2(1));
       DCHECK_EQ(SetCC, i.OutputSBit());
       break;
+    case kArmPairLsl:
+      if (instr->InputAt(2)->IsImmediate()) {
+        __ PairLsl(i.OutputRegister(0), i.OutputRegister(1), i.InputRegister(0),
+                   i.InputRegister(1), i.InputInt32(2));
+      } else {
+        __ PairLsl(i.OutputRegister(0), i.OutputRegister(1), i.InputRegister(0),
+                   i.InputRegister(1), kScratchReg, i.InputRegister(2));
+      }
+      break;
     case kArmVcmpF32:
       if (instr->InputAt(1)->IsDoubleRegister()) {
         __ VFPCompareAndSetFlags(i.InputFloat32Register(0),
                                  i.InputFloat32Register(1));
       } else {
         DCHECK(instr->InputAt(1)->IsImmediate());
         // 0.0 is the only immediate supported by vcmp instructions.
         DCHECK(i.InputFloat32(1) == 0.0f);
         __ VFPCompareAndSetFlags(i.InputFloat32Register(0), i.InputFloat32(1));
       }
@@ skipping 716 matching lines @@
       padding_size -= v8::internal::Assembler::kInstrSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8