[Bug c/38341] Wrong warning comparison of promoted ~unsigned with unsigned

fredrik dot hederstierna at securitas-direct dot com gcc-bugzilla@gcc.gnu.org
Mon Dec 1 13:36:00 GMT 2008



------- Comment #5 from fredrik dot hederstierna at securitas-direct dot com  2008-12-01 13:35 -------
On Intel i386-GCC (4.2.3) we just get warning only for the line

  if (c1 == ~c2)

The other lines does not give warnings, so maybe its just the ARM-backend that
catch this warning.

I guess you mean that for ARM target the optimization tree does things that
silence the warning. Is it good that optimizations can silence possible
warnings/errors? And that it differs depending on which backend I'm running?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38341



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