builtins.c (expand_builtin_mathfn_2, [...]): Do not expand errno setting variant…

builtins.c (expand_builtin_mathfn_2, [...]): Do not expand errno setting variant when optimizing for size.

	* builtins.c (expand_builtin_mathfn_2, expand_builtin_mathfn): Do not
	expand errno setting variant when optimizing for size.

From-SVN: r166879

gcc/ChangeLog

+2010-11-17  Jan Hubicka  <jh@suse.cz>
+
+	* builtins.c (expand_builtin_mathfn_2, expand_builtin_mathfn): Do not
+	expand errno setting variant when optimizing for size.
+
 2010-11-17  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* postreload.c (reload_combine): Call control_flow_insn_p only once.

gcc/builtins.c

@@ -2039,7 +2039,8 @@ expand_builtin_mathfn (tree exp, rtx target, rtx subtarget)
     errno_set = false;
 
   /* Before working hard, check whether the instruction is available.  */
-  if (optab_handler (builtin_optab, mode) != CODE_FOR_nothing)
+  if (optab_handler (builtin_optab, mode) != CODE_FOR_nothing
+      && (!errno_set || !optimize_insn_for_size_p ()))
     {
       target = gen_reg_rtx (mode);
 
@@ -2149,6 +2150,9 @@ expand_builtin_mathfn_2 (tree exp, rtx target, rtx subtarget)
   if (! flag_errno_math || ! HONOR_NANS (mode))
     errno_set = false;
 
+  if (errno_set && optimize_insn_for_size_p ())
+    return 0;
+
   /* Always stabilize the argument list.  */
   CALL_EXPR_ARG (exp, 0) = arg0 = builtin_save_expr (arg0);
   CALL_EXPR_ARG (exp, 1) = arg1 = builtin_save_expr (arg1);