re PR rtl-optimization/33653 (volatile memory access optimized away)

        PR rtl-optimization/33653
        * dce.c (deletable_insn_p_1): Use volatile_refs_p().
        * dse.c (scan_insn): Same.

From-SVN: r129006

gcc/ChangeLog

+2007-10-04  Michael Matz  <matz@suse.de>
+
+	PR rtl-optimization/33653
+	* dce.c (deletable_insn_p_1): Use volatile_refs_p().
+	* dse.c (scan_insn): Same.
+
 2007-10-04  Kazu Hirata  <kazu@codesourcery.com>
 
 	* config.gcc: Remove USE_GAS for m68k targets.

gcc/dce.c

@@ -78,7 +78,7 @@ deletable_insn_p_1 (rtx body)
       return false;
 
     default:
-      if (volatile_insn_p (body))
+      if (volatile_refs_p (body))
 	return false;
 
       if (flag_non_call_exceptions && may_trap_p (body))

gcc/dse.c

@@ -1997,7 +1997,7 @@ scan_insn (bb_info_t bb_info, rtx insn)
   /* Assuming that there are sets in these insns, we cannot delete
      them.  */
   if ((GET_CODE (PATTERN (insn)) == CLOBBER)
-      || volatile_insn_p (PATTERN (insn))
+      || volatile_refs_p (PATTERN (insn))
       || (flag_non_call_exceptions && may_trap_p (PATTERN (insn)))
       || (RTX_FRAME_RELATED_P (insn))
       || find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX))