[Bug rtl-optimization/29144] Missing if-conversion. If-conversion dependent on operand order. Inconsistent if-conversion.

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29144

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
b and d are fixed on trunk (GCC 7) but we're just lucky with the association.