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Disable uninitialized warning with GCC 4.8 

As with other spots in the code, GCC 4.8 unnecessarily complains about
an uninitialized variable in tanl calcs, so this patch disables.  With
it, the library and sees the usual set of test passes.

	* sysdeps/ieee754/ldbl-96/k_tanl.c: Include <libc-internal.h>.
	(__kernel_tanl): Ignore uninitialized warnings around use of SIGN.
This commit is contained in:
Stan Shebs 2015-08-26 16:10:00 -07:00 committed by Roland McGrath
parent 55504a3df0
commit fff289f358
2 changed files with 17 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2015-08-26 Stan Shebs <stanshebs@google.com>
* sysdeps/ieee754/ldbl-96/k_tanl.c: Include <libc-internal.h>.
(__kernel_tanl): Ignore uninitialized warnings around use of SIGN.
2015-08-26 Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
* sysdeps/powerpc/bits/hwcap.h: Add PPC_FEATURE2_HTM_NOSC.

12
sysdeps/ieee754/ldbl-96/k_tanl.c
View File

@ -57,6 +57,7 @@
*/
#include <float.h>
#include <libc-internal.h>
#include <math.h>
#include <math_private.h>
static const long double
@ -136,8 +137,19 @@ __kernel_tanl (long double x, long double y, int iy)
{
v = (long double) iy;
w = (v - 2.0 * (x - (w * w / (w + v) - r)));
/* SIGN is set for arguments that reach this code, but not
otherwise, resulting in warnings that it may be used
uninitialized although in the cases where it is used it has
always been set. */
DIAG_PUSH_NEEDS_COMMENT;
#if __GNUC_PREREQ (4, 7)
DIAG_IGNORE_NEEDS_COMMENT (4.8, "-Wmaybe-uninitialized");
#else
DIAG_IGNORE_NEEDS_COMMENT (4.8, "-Wuninitialized");
#endif
if (sign < 0)
w = -w;
DIAG_POP_NEEDS_COMMENT;
return w;
}
if (iy == 1)