------- Comment From andreas.kreb...@de.ibm.com 2019-11-05 10:42 EDT-------
(In reply to comment #16)
> Rebuilding eoan gcc-9.2.1 and comparing test results between -march=zEC12 &
> -march=z13 -mtune=z15
>
> There appear to be (a) improved test results (FAIL->PASS) (b) not supported
> tests anymore (PASS->missing) (c) regressed tests (PASS->FAIL). This needs
> investigating. I will publish raw logs (massaged to reduce non-reproducible
> directory names) shortly. Here are some highlights.
...
I've applied a few patches fixing these issues to GCC mainline and GCC 9 branch:
https://gcc.gnu.org/ml/gcc-patches/2019-11/msg00282.html

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https://bugs.launchpad.net/bugs/1837525

Title:
  [20.04 FEAT] Set Architecture Level (ALS) to z13

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in gcc-9 package in Ubuntu:
  Fix Released
Status in linux package in Ubuntu:
  Fix Committed

Bug description:
  IBM requests to update the Architecture Level Set (ALS) as follow..
  march=z13
  mtune=z15

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