MIPS: Lithium: avoid registers for constants when possible.

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index cfca64452b5a344eb1ac3b1ac7c3c12de8d06921..f95313e5e1f059e2249c02ddfaf60691ca27d1f9 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -2722,6 +2722,9 @@ class LChunkBuilder BASE_EMBEDDED {
   MUST_USE_RESULT LOperand* UseRegisterOrConstant(HValue* value);
   MUST_USE_RESULT LOperand* UseRegisterOrConstantAtStart(HValue* value);
 
+  // An input operand in a constant operand.
+  MUST_USE_RESULT LOperand* UseConstant(HValue* value);
+
   // An input operand in register, stack slot or a constant operand.
   // Will not be moved to a register even if one is freely available.
   MUST_USE_RESULT LOperand* UseAny(HValue* value);