On 01/17/2016 10:59 AM, Jakub Jelinek wrote:
Hi!
During profiledbootstrap, I'm seeing:
../../gcc/system.h: In function 'void autopref_multipass_init(const rtx_insn*,
int)':
../../gcc/system.h:367:29: warning: 'max_offset' may be used uninitialized in
this function [-Wmaybe-uninitialized]
#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
^
../../gcc/haifa-sched.c:5603:11: note: 'max_offset' was declared here
int max_offset;
^~~~~~~~~~
and similarly for min_offset. The warning is a false positive just because
the compiler can't know that a PARALLEL should never have zero XVECLEN (pat, 0).
prev_base which is also set during the first iteration and thus not set
if n_elems is 0 already have an initializer for this reason.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2016-01-17 Jakub Jelinek <ja...@redhat.com>
* haifa-sched.c (autopref_multipass_init): Work around
-Wmaybe-uninitialized warning.
OK. I was carrying a similar patch locally. The difference is I used
INT_MAX for min_offset and INT_MIN for max_offset, just for extra safety.
Jeff
