MIPS: Don't explicitly pass requested representations to constants; implement ConstantS

src/mips/lithium-codegen-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 1482 matching lines @@
                                  ToRegister(left),
                                  ToRegister(right),
                                  overflow);  // Reg at also used as scratch.
     }
     DeoptimizeIf(lt, instr->environment(), overflow, Operand(zero_reg));
   }
 }
 
 
 void LCodeGen::DoConstantI(LConstantI* instr) {
-  ASSERT(instr->result()->IsRegister());
   __ li(ToRegister(instr->result()), Operand(instr->value()));
 }
 
+
+void LCodeGen::DoConstantS(LConstantS* instr) {
+  __ li(ToRegister(instr->result()), Operand(instr->value()));
+}
+
 
 void LCodeGen::DoConstantD(LConstantD* instr) {
   ASSERT(instr->result()->IsDoubleRegister());
   DoubleRegister result = ToDoubleRegister(instr->result());
   double v = instr->value();
   __ Move(result, v);
 }
 
 
 void LCodeGen::DoConstantT(LConstantT* instr) {
@@ skipping 4247 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal