X87: [wasm] Fix codegen issue for i64.add and i64.sub on ia32.

src/compiler/x87/code-generator-x87.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/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 976 matching lines @@
       if (i.OutputRegister(0).code() == i.InputRegister(1).code() ||
           i.OutputRegister(0).code() == i.InputRegister(3).code()) {
         // We cannot write to the output register directly, because it would
         // overwrite an input for adc. We have to use the temp register.
         use_temp = true;
         __ Move(i.TempRegister(0), i.InputRegister(0));
         __ add(i.TempRegister(0), i.InputRegister(2));
       } else {
         __ add(i.OutputRegister(0), i.InputRegister(2));
       }
-      __ adc(i.InputRegister(1), Operand(i.InputRegister(3)));
       if (i.OutputRegister(1).code() != i.InputRegister(1).code()) {
         __ Move(i.OutputRegister(1), i.InputRegister(1));
       }
+      __ adc(i.OutputRegister(1), Operand(i.InputRegister(3)));
       if (use_temp) {
         __ Move(i.OutputRegister(0), i.TempRegister(0));
       }
       break;
     }
     case kX87SubPair: {
       // i.OutputRegister(0) == i.InputRegister(0) ... left low word.
       // i.InputRegister(1) ... left high word.
       // i.InputRegister(2) ... right low word.
       // i.InputRegister(3) ... right high word.
       bool use_temp = false;
       if (i.OutputRegister(0).code() == i.InputRegister(1).code() ||
           i.OutputRegister(0).code() == i.InputRegister(3).code()) {
         // We cannot write to the output register directly, because it would
         // overwrite an input for adc. We have to use the temp register.
         use_temp = true;
         __ Move(i.TempRegister(0), i.InputRegister(0));
         __ sub(i.TempRegister(0), i.InputRegister(2));
       } else {
         __ sub(i.OutputRegister(0), i.InputRegister(2));
       }
-      __ sbb(i.InputRegister(1), Operand(i.InputRegister(3)));
       if (i.OutputRegister(1).code() != i.InputRegister(1).code()) {
         __ Move(i.OutputRegister(1), i.InputRegister(1));
       }
+      __ sbb(i.OutputRegister(1), Operand(i.InputRegister(3)));
       if (use_temp) {
         __ Move(i.OutputRegister(0), i.TempRegister(0));
       }
       break;
     }
     case kX87MulPair: {
       __ imul(i.OutputRegister(1), i.InputOperand(0));
       __ mov(i.TempRegister(0), i.InputOperand(1));
       __ imul(i.TempRegister(0), i.InputOperand(2));
       __ add(i.OutputRegister(1), i.TempRegister(0));
@@ skipping 1700 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8