[UBUNTU 20.10] GCC: Accept vector alignment hints on z13

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On z13 we have that vector alignment hints are already accepted. This backport enables GCC to emit such hints not only for target z14 but also for z13 in case GAS accepts them on z13, too. Since GCC's default target on Ubuntu is z13 for s390x, we could greatly benefit from such alignment hints. (note a separate bugzilla entry for binutils/GAS allowing to accept alignment hints for z13 has been opened)

This is a backport of upstream commits 313e02cfb97 and 710f7d977d1.

---Additional Hardware Info---
n/a

---uname output---
n/a

---Debugger Data---
n/a

Machine Type = z13 2964

---Steps to Reproduce---
 n/a

Userspace tool common name: gcc

The userspace tool has the following bit modes: 64-bit

Userspace rpm: gcc

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Default Comment by Bridge

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Default Comment by Bridge

[Dimitri John Ledkov (xnox)]

Thank you for gcc-9 and gcc-10 patch.

We are about to switch default compiler to gcc-10 in 20.10, so not sure if we will need gcc-9 patch in groovy or not.

[Dimitri John Ledkov (xnox)]

https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/1888654 binutils patch is related.

[Dimitri John Ledkov (xnox)]

binutils already available in groovy

[Dimitri John Ledkov (xnox)]

Have these backports been submitted to the stable branches of gcc-10/gcc-9?

We regularly update from the stable branches.

[Matthias Klose (doko)]

it's always better to have those backports in the upstream branches first.

[bugproxy (bugproxy)]

------- Comment From <email address hidden> 2020-07-23 09:00 EDT-------
Yes, upstream in
releases/gcc-9 as commit 313e02cfb97 and
releases/gcc-10 as commit 710f7d977d1

For us it is also important to get this into LTS version 20.04. Any chance for this?

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------- Comment From <email address hidden> 2020-07-23 09:24 EDT-------
(In reply to comment #13)
> it's always better to have those backports in the upstream branches first.

yes, that has been already done a couple of days ago

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------- Comment From <email address hidden> 2020-07-27 11:06 EDT-------
As requested for binutils in
https://bugs.launchpad.net/ubuntu/+source/binutils/+bug/1888654
getting the changes for GCC9/10 also in the LTS version 20.04 is important to us. @Canonical can you please add 20.04 to LP, too? Thanks!

Version 20.10 seems to be fixed for me now, since the patches are upstream.

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------- Comment From <email address hidden> 2020-08-20 07:21 EDT-------
@Canonical, any update available? Many thx

[Andrew Cloke (andrew-cloke)]

Moving back to "new" status as the patches are now upstream.
@heinz-werner, I'll investigate the status. Thanks.

[Dimitri John Ledkov (xnox)]

releases/gcc-10 as commit 710f7d977d1

Has been available in Groovy since 8th of August, when 10.2.0-3ubuntu1 migrated

gcc-10 (10.2.0-3ubuntu1) groovy; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.
    - Don't run the tests on riscv64.

 -- Matthias Klose <email address hidden> Sat, 25 Jul 2020 14:57:54 +0200

gcc-10 (10.2.0-3) unstable; urgency=medium

  * Update to git 20200725 from the gcc-10 branch.
    - Fix PR target/96190 (SPARC), PR target/96236 (PPC), PR target/96260,
      PR fortran/95980, PR fortran/95980, PR fortran/96086, PR fortran/89574,
      PR fortran/96220, PR fortran/96018.
  * Re-enable gm2, disabled by accident in 10.2.0-1.
  * Refresh gm2 patches.
  * Apply proposed gdc patch (Iain Buclaw). Closes: #966026.
  * Apply proposed patch for PR bootstrap/96203, add -fcf-protection=check.

 -- Matthias Klose <email address hidden> Sat, 25 Jul 2020 14:52:31 +0200

[Dimitri John Ledkov (xnox)]

releases/gcc-9 as commit 313e02cfb97

Has been available in Groovy since 11th of August, when 9.3.0-17ubuntu1 migrated, but the change was part of the 16ubuntu1 upload.

gcc-9 (9.3.0-16ubuntu1) groovy; urgency=medium

  * Merge with Debian; remaining changes:
    - Build from upstream sources.
    - Disable the LTO build on arm64, armhf for now, takes 24+ hours ...

 -- Matthias Klose <email address hidden> Tue, 21 Jul 2020 11:57:43 +0200

gcc-9 (9.3.0-16) unstable; urgency=medium

  * Update to git 20200721 from the gcc-9 branch.
    - Fix PR target/94891 (AArch64), PR target/94791 (AArch64),
      PR target/96001 (AArch64).
    - Fix missing dependencies for selftests which occasionally causes
      failed builds. Addresses: #960913.
  * Build the GC enabled libobjc on arm64, mips and mipsel as well.

 -- Matthias Klose <email address hidden> Tue, 21 Jul 2020 11:49:23 +0200

[Dimitri John Ledkov (xnox)]

20.04 will be done, whenever gcc packages will be updated again in focal, batched up with other gcc upstream point release. I don't have an ETA at the moment.

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------- Comment From <email address hidden> 2020-09-04 02:57 EDT-------
IBM Bugzilla status-> closed, Fix Released with all requested distros