MIPS: Update the gap resolver to support Smi constants.

src/mips/lithium-gap-resolver-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 234 matching lines @@
       } else {
         __ lw(kLithiumScratchReg, source_operand);
         __ sw(kLithiumScratchReg, destination_operand);
       }
     }
 
   } else if (source->IsConstantOperand()) {
     LConstantOperand* constant_source = LConstantOperand::cast(source);
     if (destination->IsRegister()) {
       Register dst = cgen_->ToRegister(destination);
-      if (cgen_->IsInteger32(constant_source)) {
+      if (cgen_->IsSmi(constant_source)) {
+        __ li(dst, Operand(cgen_->ToSmi(constant_source)));
+      } else if (cgen_->IsInteger32(constant_source)) {
         __ li(dst, Operand(cgen_->ToInteger32(constant_source)));
       } else {
         __ LoadObject(dst, cgen_->ToHandle(constant_source));
       }
     } else {
       ASSERT(destination->IsStackSlot());
       ASSERT(!in_cycle_);  // Constant moves happen after all cycles are gone.
-      if (cgen_->IsInteger32(constant_source)) {
+      if (cgen_->IsSmi(constant_source)) {
+        __ li(kLithiumScratchReg, Operand(cgen_->ToSmi(constant_source)));
+      } else if (cgen_->IsInteger32(constant_source)) {
         __ li(kLithiumScratchReg,
               Operand(cgen_->ToInteger32(constant_source)));
       } else {
         __ LoadObject(kLithiumScratchReg,
                       cgen_->ToHandle(constant_source));
       }
       __ sw(kLithiumScratchReg, cgen_->ToMemOperand(destination));
     }
 
   } else if (source->IsDoubleRegister()) {
@@ skipping 33 matching lines @@
     UNREACHABLE();
   }
 
   moves_[index].Eliminate();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal