On Wed, 26 Mar 2025 at 10:17, Jonathan Wakely <jwakely....@gmail.com> wrote:
>
> On Wed, 26 Mar 2025 at 09:55, Jonathan Wakely <jwakely....@gmail.com> wrote:
> >
> > On Wed, 26 Mar 2025 at 00:55, <ci_not...@linaro.org> wrote:
> > >
> > > 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-15-8904-ge200f53a555
> > >   | Author: Jonathan Wakely <jwak...@redhat.com>
> > >   | Date:   Tue Mar 25 13:24:08 2025 +0000
> > >   |
> > >   |     libstdc++: Optimize std::vector construction from input iterators 
> > > [PR108487]
> > >   |
> > >   |     LWG 3291 make std::ranges::iota_view's iterator have 
> > > input_iterator_tag
> > >   |     as its iterator_category, even though it satisfies the C++20
> > >   |     std::forward_iterator concept. This means that the traditional
> > >   | ... 41 lines of the commit log omitted.
> > >
> > > Produces 2 regressions:
> > >   |
> > >   | regressions.sum:
> > >   | Running g++:g++.dg/dg.exp ...
> > >   | FAIL: g++.dg/tree-ssa/initlist-opt1.C -std=c++26  scan-tree-dump 
> > > gimple "_M_range_initialize<const char\\* const\\*>"
> > >   | FAIL: g++.dg/tree-ssa/initlist-opt2.C -std=c++26  scan-tree-dump 
> > > gimple "_M_range_initialize<const char\\* const\\*>"
> > >
> > > Used configuration :
> > >  *CI config* tcwg_gcc_check master-aarch64
> > >  *configure and test flags:* none, autodetected on 
> > > aarch64-unknown-linux-gnu
> > >
> > > We track this bug report under 
> > > https://linaro.atlassian.net/browse/GNU-1548. Please let us know if you 
> > > have a fix.
> >
> > I have a fix:
> >
> > --- a/gcc/testsuite/g++.dg/tree-ssa/initlist-opt1.C
> > +++ b/gcc/testsuite/g++.dg/tree-ssa/initlist-opt1.C
> > @@ -4,7 +4,7 @@
> > // { dg-skip-if "requires hosted libstdc++ for string" { ! hostedlib } }
> >
> > // Test that we do range-initialization from const char *.
> > -// { dg-final { scan-tree-dump {_M_range_initialize<const char\*
> > const\*>} "gimple" } }
> > +// { dg-final { scan-tree-dump {_M_range_initialize_n<const char\*
> > const\*} "gimple" } }
> > // { dg-final { scan-tree-dump {static const char.*72} "gimple" } }
> >
> > #include <string>
> >
>
> Now posted as https://gcc.gnu.org/pipermail/gcc-patches/2025-March/679317.html

A slightly simpler version of the patch has now been pushed as
r15-8934-g101f302363e877

>
>
> >
> >
> > >
> > > 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/3491/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/3491/artifact/artifacts/notify/
> > > The list of [ignored] baseline and flaky failures are in
> > >  * 
> > > https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/3491/artifact/artifacts/sumfiles/xfails.xfail
> > >
> > > Current build   : 
> > > https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/3491/artifact/artifacts
> > > Reference build : 
> > > https://ci.linaro.org/job/tcwg_gcc_check--master-aarch64-build/3490/artifact/artifacts
> > >
> > > Instruction to reproduce the build : 
> > > https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/gcc/sha1/e200f53a5556516ec831e6b7a34aaa0f10a4ab0a/tcwg_gcc_check/master-aarch64/reproduction_instructions.txt
> > >
> > > Full commit : 
> > > https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=e200f53a5556516ec831e6b7a34aaa0f10a4ab0a

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