Dear contributor,

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

In gcc_check master-aarch64, after:
  | commit gcc-15-5735-g1046c32de495
  | Author: Jan Hubicka <hubi...@ucw.cz>
  | Date:   Wed Nov 27 23:52:37 2024 +0100
  | 
  |     optimize basic_string
  |     
  |     Add __builtin_unreachable conditionls to declare value ranges of
  |     basic_string::length().  FIx max_size() to return actual max size
  |     using logic similar to std::vector. Aviod use of size() in empty()
  | ... 26 lines of the commit log omitted.

Produces 3 regressions:
  | Running g++:g++.dg/dg.exp ...
  | UNRESOLVED: g++.dg/tree-ssa/empty-loop.C -std=gnu++17  scan-tree-dump-not 
cddce3 "if"
  | UNRESOLVED: g++.dg/tree-ssa/empty-loop.C -std=gnu++26  scan-tree-dump-not 
cddce3 "if"
  | UNRESOLVED: g++.dg/tree-ssa/empty-loop.C -std=gnu++98  scan-tree-dump-not 
cddce3 "if"

Used configuration :
 *CI config* tcwg_gcc_check master-aarch64
 *configure and test flags:* --target aarch64-linux-gnu

We track this bug report under https://linaro.atlassian.net/browse/GNU-1432. 
Please let us know if you have a fix.

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

-----------------8<--------------------------8<--------------------------8<--------------------------

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
 * 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/2963/artifact/artifacts/00-sumfiles/
The full lists of regressions and improvements as well as configure and make 
commands are in
 * 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/2963/artifact/artifacts/notify/
The list of [ignored] baseline and flaky failures are in
 * 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/2963/artifact/artifacts/sumfiles/xfails.xfail

Current build   : 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/2963/artifact/artifacts
Reference build : 
https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/2962/artifact/artifacts

Instruction to reproduce the build : 
https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/1046c32de4956c3d706a2ff8683582fd21b8f360/tcwg_gcc_check/master-aarch64/reproduction_instructions.txt

Full commit : 
https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=1046c32de4956c3d706a2ff8683582fd21b8f360

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