Refactoring only: Make it clear that MOD is special.

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index f8091206a6051a4961162c74e8638fb3ef0d6ed2..6bb8bbefd98257af39c23d66d3a477da2d83d741 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -761,21 +761,20 @@ LInstruction* LChunkBuilder::DoArithmeticD(Token::Value op,
   ASSERT(instr->representation().IsDouble());
   ASSERT(instr->left()->representation().IsDouble());
   ASSERT(instr->right()->representation().IsDouble());
-  LOperand* left = NULL;
-  LOperand* right = NULL;
   if (op == Token::MOD) {
-    left = UseFixedDouble(instr->left(), f2);
-    right = UseFixedDouble(instr->right(), f4);
+    LOperand* left = UseFixedDouble(instr->left(), f2);
+    LOperand* right = UseFixedDouble(instr->right(), f4);
     LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
     // We call a C function for double modulo. It can't trigger a GC. We need
     // to use fixed result register for the call.
     // TODO(fschneider): Allow any register as input registers.
     return MarkAsCall(DefineFixedDouble(result, f2), instr);
+  } else {
+    LOperand* left = UseRegisterAtStart(instr->left());
+    LOperand* right = UseRegisterAtStart(instr->right());
+    LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
+    return DefineAsRegister(result);
   }
-  left = UseRegisterAtStart(instr->left());
-  right = UseRegisterAtStart(instr->right());
-  LArithmeticD* result = new(zone()) LArithmeticD(op, left, right);
-  return DefineAsRegister(result);
 }