Public bug reported:
elk FTBFS in Ubuntu on ppc64el because ppc64el is using -O3, and elk
internally uses a so-called "Generic_Function" that wraps calls to
function pointers that might take either 1 or 2 args.
The code in question will never actually try to call pow() with a single
arg, but enforcement of this is several layers away, stymying the
optimizer.
Will attach a reduced test case to reproduce this issue. Problem can be
reproduced by calling:
gcc-5 -O3 -c math2.i -o libelk_la-math.o
It is also reproducible with gcc-6.
It is reproducible cross-architecture, ppc64el is just the only
architecture using -O3 by default.
** Affects: gcc-5 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1563134
Title:
ICE in gimple_expand_builtin_pow with -O3 on ppc64el
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