Fix an UBSAN test-case (PR sanitizer/63361).

2017-07-19  Martin Liska  <mliska@suse.cz>

	PR sanitizer/63361
	* c-c++-common/ubsan/float-cast-overflow-1.c: Add either
	-ffloat-store or -mieee for targets that need it.

From-SVN: r250336

gcc/testsuite/ChangeLog

+2017-07-19  Martin Liska  <mliska@suse.cz>
+
+	PR sanitizer/63361
+	* c-c++-common/ubsan/float-cast-overflow-1.c: Add either
+	-ffloat-store or -mieee for targets that need it.
+
 2017-07-18  Tom de Vries  <tom@codesourcery.com>
 
 	PR middle-end/81464

gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-1.c

 /* { dg-do run { target { lp64 || ilp32 } } } */
 /* { dg-options "-fsanitize=float-cast-overflow" } */
-/* { dg-additional-options "-msse2 -mfpmath=sse" { target { sse2_runtime && ia32 } } } */
+/* { dg-additional-options "-ffloat-store" { target { ia32 } } } */
+/* { dg-additional-options "-mieee" { target { { alpha*-*-* } || { sh*-*-* } } } } */
 
 #include <limits.h>
 #include "float-cast.h"