Fix uses of -mno-fp-in-toc and -mrelocatable

From-SVN: r13682

gcc/config/rs6000/rs6000.md

@@ -5162,6 +5162,11 @@
       && GET_CODE (operands[1]) != HIGH
       && ! LEGITIMATE_CONSTANT_POOL_ADDRESS_P (operands[1]))
     {
+      /* Emit a USE operation so that the constant isn't deleted if
+	 expensive optimizations are turned on because nobody
+	 references it */
+      emit_insn (gen_rtx (USE, VOIDmode, operands[1]));
+
       /* If we are to limit the number of things we put in the TOC and
 	 this is a symbol plus a constant we can add in one insn,
 	 just put the symbol in the TOC and add the constant.  Don't do