[Bug tree-optimization/52904] -Wstrict-overflow false alarm with bounded loop

[Laurent.Rineau__gcc at normalesup dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904

Laurent Rineau <Laurent.Rineau__gcc at normalesup dot org> changed:

           What    |Removed                     |Added
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                 CC|                            |Laurent.Rineau__gcc@normale
                   |                            |sup.org

--- Comment #5 from Laurent Rineau <Laurent.Rineau__gcc at normalesup dot org> ---
With the following gcc version:
  gcc (GCC) 4.8.2 20131017 (Red Hat 4.8.2-1)

I have a similar result:

$ gcc -c -Wstrict-overflow -O2 v.i
v.i: In function ‘wait_reading_process_output’:
v.i:14:6: warning: assuming signed overflow does not occur when simplifying
conditional to constant [-Wstrict-overflow]
   if (nfds < 0)
      ^

That diagnostic seems right, according to the documentation of
-Wstrict-overflow.