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authorStan Shebs <stanshebs@google.com>2015-08-26 16:10:00 -0700
committerRoland McGrath <roland@hack.frob.com>2015-08-26 16:10:43 -0700
commitfff289f358ee26bb4cdd70f72f4b1b0e1a7d07a1 (patch)
tree178d336afbbe2df8521eccc7e4e16f66ab60531c /sysdeps/ieee754
parent55504a3df099b70e06cd14064adfe6bd815cedbd (diff)
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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.
Diffstat (limited to 'sysdeps/ieee754')
-rw-r--r--sysdeps/ieee754/ldbl-96/k_tanl.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-96/k_tanl.c b/sysdeps/ieee754/ldbl-96/k_tanl.c
index ae6821d984..6276c06e71 100644
--- a/sysdeps/ieee754/ldbl-96/k_tanl.c
+++ b/sysdeps/ieee754/ldbl-96/k_tanl.c
@@ -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)