[Bug tree-optimization/60766] [4.8/4.9 Regression] Wrong optimization with -O2

[mikpelinux at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60766

Mikael Pettersson <mikpelinux at gmail dot com> changed:

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--- Comment #4 from Mikael Pettersson <mikpelinux at gmail dot com> ---
Created attachment 32552
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32552&action=edit
self-contained test case, compilable as C and C++

The wrong-code reproduces for me with gcc 4.7 and 4.8 on x86_64-linux.  For
trunk it was fixed by r204515, which doesn't appear to be a wrong-code fix. 
Backporting r204515 to 4.8 fixes the wrong-code there too, but I haven't tested
it beyond this test case.