[Bug c/27007] Missed optimization of comparison with 'limited range'

[trt at acm dot org]

------- Comment #3 from trt at acm dot org  2006-04-03 19:22 -------
Since x is unsigned char, default promotions apply and x+1 will be a signed
integer in the range 1..256


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27007