[Bug middle-end/52306] [4.8 regression] ICE in cselib_record_set, at cselib.c:2158

[mikpelinux at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52306

--- Comment #32 from Mikael Pettersson <mikpelinux at gmail dot com> ---
(In reply to Andreas Schwab from comment #31)
> After backporting the patch to 4.8 there is still a package that fails with
> the same error, though it doesn't fail with 4.9.

This ICE stopped on trunk with Bin Cheng's "Compute, cache and use cost of
auto-increment rtx patterns in IVOPT" patch in r205015, see also

http://gcc.gnu.org/ml/gcc-patches/2013-11/msg00156.html

Backporting this too to 4.8 stops the ICE there for this test case.  However,
this patch is just a missed-optimization tweak in ivopts, so I suspect it hides
the underlying bug rather than fixing it.