PR 61876: Do not convert cast + __builtin_round into __builtin_lround unless -fno...

	PR middle-end/61876
	* convert.c (convert_to_integer): Do not convert BUILT_IN_ROUND and cast
	when flag_errno_math is on.

From-SVN: r212989

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 04c51e40e84caf95197ff2aef5c0eb9c82a4cefc..96a8161787ddec3a2b0b863b580087a62c4f2ef2 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-07-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+       PR middle-end/61876
+       * convert.c (convert_to_integer): Do not convert BUILT_IN_ROUND and cast
+       when flag_errno_math is on.
+
 2014-07-24  Martin Liska  <mliska@suse.cz>
 
        * cgraph.h (varpool_node):

diff --git a/gcc/convert.c b/gcc/convert.c
index 09bc555ee0ee88ddb3a05f647e7ea13476889de7..8dbf3cb07975981972ceb471e4ac02c74a26c6f7 100644 (file)
--- a/gcc/convert.c
+++ b/gcc/convert.c
@@ -456,8 +456,8 @@ convert_to_integer (tree type, tree expr)
          break;
 
        CASE_FLT_FN (BUILT_IN_ROUND):
-         /* Only convert in ISO C99 mode.  */
-         if (!targetm.libc_has_function (function_c99_misc))
+         /* Only convert in ISO C99 mode and with -fno-math-errno.  */
+         if (!targetm.libc_has_function (function_c99_misc) || flag_errno_math)
            break;
          if (outprec < TYPE_PRECISION (integer_type_node)
              || (outprec == TYPE_PRECISION (integer_type_node)