On Sun, 11 Sep 2016, Igor Shevlyakov wrote:

Small sample below fails (at least on 6.1) for multiple targets. The
difference between two functions start at the very first tree pass...

You are missing -fsanitize=undefined (and #include <stdlib.h>).

Please use the mailing list gcc-h...@gcc.gnu.org next time.

--
Marc Glisse

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