[x64] Recognize MOVSXWL.

src/compiler/x64/code-generator-x64.cc

 // Copyright 2013 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/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 466 matching lines @@
     case kSSEUint32ToFloat64:
       if (instr->InputAt(0)->IsRegister()) {
         __ movl(kScratchRegister, i.InputRegister(0));
       } else {
         __ movl(kScratchRegister, i.InputOperand(0));
       }
       __ cvtqsi2sd(i.OutputDoubleRegister(), kScratchRegister);
       break;
     case kX64Movsxbl:
       __ movsxbl(i.OutputRegister(), i.MemoryOperand());
+      __ AssertZeroExtended(i.OutputRegister());
       break;
     case kX64Movzxbl:
       __ movzxbl(i.OutputRegister(), i.MemoryOperand());
       break;
     case kX64Movb: {
       int index = 0;
       Operand operand = i.MemoryOperand(&index);
       if (HasImmediateInput(instr, index)) {
         __ movb(operand, Immediate(i.InputInt8(index)));
       } else {
         __ movb(operand, i.InputRegister(index));
       }
       break;
     }
     case kX64Movsxwl:
-      __ movsxwl(i.OutputRegister(), i.MemoryOperand());
+      if (instr->addressing_mode() != kMode_None) {
+        __ movsxwl(i.OutputRegister(), i.MemoryOperand());
+      } else if (instr->InputAt(0)->IsRegister()) {
+        __ movsxwl(i.OutputRegister(), i.InputRegister(0));
+      } else {
+        __ movsxwl(i.OutputRegister(), i.InputOperand(0));
+      }
+      __ AssertZeroExtended(i.OutputRegister());
       break;
     case kX64Movzxwl:
       __ movzxwl(i.OutputRegister(), i.MemoryOperand());
+      __ AssertZeroExtended(i.OutputRegister());
       break;
     case kX64Movw: {
       int index = 0;
       Operand operand = i.MemoryOperand(&index);
       if (HasImmediateInput(instr, index)) {
         __ movw(operand, Immediate(i.InputInt16(index)));
       } else {
         __ movw(operand, i.InputRegister(index));
       }
       break;
     }
     case kX64Movl:
       if (instr->HasOutput()) {
         if (instr->addressing_mode() == kMode_None) {
           if (instr->InputAt(0)->IsRegister()) {
             __ movl(i.OutputRegister(), i.InputRegister(0));
           } else {
             __ movl(i.OutputRegister(), i.InputOperand(0));
           }
         } else {
           __ movl(i.OutputRegister(), i.MemoryOperand());
         }
+        __ AssertZeroExtended(i.OutputRegister());
       } else {
         int index = 0;
         Operand operand = i.MemoryOperand(&index);
         if (HasImmediateInput(instr, index)) {
           __ movl(operand, i.InputImmediate(index));
         } else {
           __ movl(operand, i.InputRegister(index));
         }
       }
       break;
@@ skipping 31 matching lines @@
       if (instr->HasOutput()) {
         __ movsd(i.OutputDoubleRegister(), i.MemoryOperand());
       } else {
         int index = 0;
         Operand operand = i.MemoryOperand(&index);
         __ movsd(operand, i.InputDoubleRegister(index));
       }
       break;
     case kX64Lea32:
       __ leal(i.OutputRegister(), i.MemoryOperand());
+      __ AssertZeroExtended(i.OutputRegister());
       break;
     case kX64Lea:
       __ leaq(i.OutputRegister(), i.MemoryOperand());
       break;
     case kX64Push:
       if (HasImmediateInput(instr, 0)) {
         __ pushq(i.InputImmediate(0));
       } else {
         if (instr->InputAt(0)->IsRegister()) {
           __ pushq(i.InputRegister(0));
@@ skipping 425 matching lines @@
     }
   }
   MarkLazyDeoptSite();
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace compiler
 }  // namespace v8