[Linaro-TCWG-CI] gcc-17-4081-g87c97883d659: 3 regressions on aarch64

[ci_notify@linaro.org]

Dear contributor,

Our automatic CI has detected problems related to your patch(es). Please find some details below.

In  aarch64 native, after:
  | commit gcc-17-4081-g87c97883d659
  | Author: Kyrylo Tkachov <ktkachov@nvidia.com>
  | Date:   Thu Jul 30 18:13:04 2026 +0200
  | 
  |     match.pd: Narrow promoted saturating addition and subtraction
  |     
  |     Integer promotions and explicit vector conversions can leave a narrow
  |     saturating operation as extensions, a wide operation, a clamp, and a
  |     truncation.  Simplify these forms:
  | ... 58 lines of the commit log omitted.

Produces 3 regressions:
  | 
  | regressions.sum:
  | Running gcc:gcc.target/aarch64/aarch64.exp ...
  | FAIL: gcc.target/aarch64/sat_u_promoted-1.c scan-tree-dump-times optimized "\\.SAT_SUB " 4
  | FAIL: gcc.target/aarch64/sat_u_promoted-2.c scan-assembler uqsub\tv[0-9]+.16b
  | FAIL: gcc.target/aarch64/sat_u_promoted-2.c scan-tree-dump optimized "\\.SAT_SUB "

Used configuration :
 *CI config* tcwg_gcc_check aarch64-linux-gnu
 *configure and test flags:* none, autodetected on aarch64-unknown-linux-gnu--disable-multilib --enable-fix-cortex-a53-835769 --enable-fix-cortex-a53-843419 --with-arch=armv8-a

We track this bug report under https://linaro.atlassian.net/browse/GNU-2031. (Require Linaro login) Please let us know if you have a fix.

If you have any questions regarding this report, please ask on linaro-toolchain@lists.linaro.org mailing list.

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The information below contains the details of the failures, and the ways to reproduce a debug environment:

You can find the failure logs in *.log.1.xz files in
 * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10606/archive/artifacts/00-sumfiles/
The full lists of regressions and improvements as well as configure and make commands are in
 * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10606/archive/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10606/archive/artifacts/sumfiles/xfails.xfail

Current build   : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10606/archive/artifacts/
Reference build : http://54.172.246.49:9090/jobs/tcwg_gcc_check--master-aarch64-build/builds/10605/archive/artifacts/

Instruction to reproduce the build : https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/87c97883d659edc4b6d5cbece74d7ab7a3584a75/tcwg_gcc_check/master-aarch64/reproduction_instructions.txt

Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git