[PATCH, SH] fix builtin_strncmp

[Christian Bruel]

Hi,

This patch fixes a bug of mine whereas more bytes than needed was read
when processing remaining bytes after an aligned  word at at time loop.
This case was not caught neither by the gcc testsuite not the glibc
tests, Regression test included.

no new regressions with the GCC and glibc testsuites., OK for trunk ?

thanks,
Christian




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