[Bug middle-end/106534] [13 Regression][gcn] ICE 'verify_ssa failed' / 'error: definition in block 18 does not dominate use in block 19' during libgfortran bootstrap

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106534

--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 5 Aug 2022, burnus at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106534
> 
> --- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> ---
> Seems as if the ICE is fixed for that file by reverting the following commit:
> 
> commit r13-1963-gc832ec4c3ec4853ad89ff3b0dbf6e9454e75e8cc
>     middle-end: Fix phi-ssa assertion triggers.  [PR106519]

As hinted in the e-mail exchange the earlier two transforms might need
guarding with !diamond_p since IIRC only minmax is capable of dealing
with it?