(movsi): If -mno-sum-in-toc, do addition of symbol + const.

From-SVN: r6635

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index c1325dd..aa55d33 100644 (file)
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -2844,6 +2844,25 @@
   if (CONSTANT_P (operands[1]) && GET_CODE (operands[1]) != CONST_INT
       && ! LEGITIMATE_CONSTANT_POOL_ADDRESS_P (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 sumbol in the TOC and add the constant.  Don't do
+        this if reload is in progress.  */
+      if (GET_CODE (operands[1]) == CONST
+         && TARGET_NO_SUM_IN_TOC && ! reload_in_progress
+         && GET_CODE (XEXP (operands[1], 0)) == PLUS
+         && add_operand (XEXP (XEXP (operands[1], 0), 1), SImode)
+         && (GET_CODE (XEXP (XEXP (operands[1], 0), 0)) == LABEL_REF
+             || GET_CODE (XEXP (XEXP (operands[1], 0), 0)) == SYMBOL_REF)
+         && ! side_effects_p (operands[0]))
+       {
+         rtx sym = force_const_mem (SImode, XEXP (XEXP (operands[1], 0), 0));
+         rtx other = XEXP (XEXP (operands[1], 0), 1);
+
+         emit_insn (gen_addsi3 (operands[0], force_reg (SImode, sym), other));
+         DONE;
+       }
+
       operands[1] = force_const_mem (SImode, operands[1]);
       if (! memory_address_p (SImode, XEXP (operands[1], 0))
          && ! reload_in_progress)