Latest trunk gives a set but not used warning for the following code:
int
foo (int status)
{
if ((((signed char) ((((__extension__ ({ union { __typeof(status) __in; int
__i; } __u; __u.__in = (status); __u.__i; }))) & 0x7f) + 1) >> 1) > 0))
return 0;
else
return 1;
}
It's a reduced test case from bootstraping gcc failure on Ubuntu 9.04.
--
Summary: False set but not used warning
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: regression
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jiez at gcc dot gnu dot org
GCC build triplet: x86_64-pc-linux-gnu
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43713
