[Bug c/63189] [4.8 Regression] Incorrect results from trivial loop when optimized with O3 or O2+tree vectorization

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63189

Mikael Pettersson <mikpelinux at gmail dot com> changed:

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--- Comment #3 from Mikael Pettersson <mikpelinux at gmail dot com> ---
I can reproduce the wrong-code with current 4.8, but not with 4.7.4 or 4.6.4
(all unmodified FSF versions).  The bug in 4.8 gets fixed by backporting
r202663, which also fixes PR60196.  The three test cases are essentially
identical.