Daily bump.

diff --git a/contrib/ChangeLog b/contrib/ChangeLog
index 2938e98a104e10b98972b51e50051b173627137f..55737ced848ae4f55e8b3830f5abc89084c02b9e 100644 (file)
--- a/contrib/ChangeLog
+++ b/contrib/ChangeLog
@@ -1,3 +1,20 @@
+2025-10-08  Jakub Jelinek  <jakub@redhat.com>
+
+       * unicode/README: Add HangulSyllableType.txt file to the
+       list as newest utf8_gen.py from glibc now needs it.  Adjust
+       git commit hash and change unicode 16 version to 17.
+       * unicode/from_glibc/utf8_gen.py: Updated from glibc.
+       * unicode/DerivedCoreProperties.txt: Updated from Unicode 17.0.0.
+       * unicode/emoji-data.txt: Likewise.
+       * unicode/PropList.txt: Likewise.
+       * unicode/GraphemeBreakProperty.txt: Likewise.
+       * unicode/DerivedNormalizationProps.txt: Likewise.
+       * unicode/NameAliases.txt: Likewise.
+       * unicode/UnicodeData.txt: Likewise.
+       * unicode/EastAsianWidth.txt: Likewise.
+       * unicode/DerivedGeneralCategory.txt: Likewise.
+       * unicode/HangulSyllableType.txt: New file.
+
 2025-10-05  Mark Wielaard  <mark@klomp.org>
 
        * gcc-changelog/git_update_version.py (ignored_commits): Add

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0dec12e27852ed019975a30e107944cad8d6e9dc..19a17a393597e7ac3f98c9dad647af82b9b5de60 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,70 @@
+2025-10-08  Antoni Boucher  <bouanto@zoho.com>
+
+       * configure: Regenerate.
+
+2025-10-08  Trevor Gross  <tmgross@umich.edu>
+
+       PR target/115054
+       * config/i386/i386.cc (function_arg_ms_64,
+       function_value_ms_64): Pass and return _Float16 in vector
+       registers on Windows.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/110223
+       PR tree-optimization/122128
+       * tree-vect-patterns.cc (vect_recog_bool_pattern): Add
+       compensation for mixed mask/data bitwise operations.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       * tree-vect-patterns.cc (integer_type_for_mask): Only
+       reject vect_external_defs.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       * doc/tm.texi.in (JIT Language and ABI): Add menu item.
+       * doc/tm.texi: Re-generate.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/110223
+       * tree-vect-patterns.cc (vect_recog_bool_pattern): Fix
+       mistakes in the store-from-mask bool pattern.  Add
+       required mask conversions.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/105490
+       * tree-vect-patterns.cc (build_mask_conversion): Move earlier.
+       (vect_convert_mask_for_vectype): Likewise.
+       (vect_recog_bool_pattern): Remove redundant truth type
+       construction.  Add missing possibly required mask conversion.
+
+2025-10-08  Antoni Boucher  <bouanto@zoho.com>
+
+       PR jit/112466
+       * Makefile.in (tm_jit_file_list, tm_jit_include_list, TM_JIT_H,
+       JIT_TARGET_DEF, JIT_TARGET_H, JIT_TARGET_OBJS): New variables.
+       (tm_jit.h, cs-tm_jit.h, jit/jit-target-hooks-def.h,
+       s-jit-target-hooks-def-h, default-jit.o): New rules.
+       (s-tm-texi): Also check timestamp on jit-target.def.
+       (generated_files): Add TM_JIT_H and jit/jit-target-hooks-def.h.
+       (build/genhooks.o): Also depend on JIT_TARGET_DEF.
+       * config.gcc (tm_jit_file, jit_target_objs, target_has_targetjitm):
+       New variables.
+       * config/i386/t-i386 (i386-jit.o): New rule.
+       * configure: Regenerate.
+       * configure.ac (tm_jit_file_list, tm_jit_include_list,
+       jit_target_objs): Add substitutes.
+       * doc/tm.texi: Regenerate.
+       * doc/tm.texi.in (targetjitm): Document.
+       (target_has_targetjitm): Document.
+       * genhooks.cc: Include jit/jit-target.def.
+       * config/default-jit.cc: New file.
+       * config/i386/i386-jit.cc: New file.
+       * config/i386/i386-jit.h: New file.
+
 2025-10-07  Alfie Richards  <alfie.richards@arm.com>
 
        * doc/tm.texi: Regenerate.

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index b95af03f6e9bcfb4a008f850510045f7bfa17bd1..80c58c12bccf6a2364f28072380e22e7ed22c30d 100644 (file)
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20251008
+20251009

diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog
index 465ab18c7d82bf4a41a81fa4cf318a4e35a3c5c7..1142d06406402a355f22b6e3e4b890320c3672ee 100644 (file)
--- a/gcc/c-family/ChangeLog
+++ b/gcc/c-family/ChangeLog
@@ -1,3 +1,9 @@
+2025-10-08  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c/122188
+       * c-gimplify.cc (c_gimplify_expr): Gimplify CALL_EXPR_ARG (*expr_p, 0)
+       instead of calling save_expr on it.
+
 2025-10-04  Jakub Jelinek  <jakub@redhat.com>
 
        PR c++/114457

diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 5b6a56e3c42186bf7114b9b14e0ca22de94801c0..241e71bf25ce72cf8a23a32a3ea1cecf6e2e8ca2 100644 (file)
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,26 @@
+2025-10-08  Joseph Myers  <josmyers@redhat.com>
+
+       * c-typeck.cc (in_generic, save_maybe_used, restore_maybe_used):
+       New.
+       (mark_decl_used, record_maybe_used_decl, pop_maybe_used): Use
+       in_generic.
+       (struct maybe_used_decl): Move to c-tree.h.
+       * c-tree.h (struct maybe_used_decl): Move from c-typeck.cc.
+       (in_generic, save_maybe_used, restore_maybe_used): Declare.
+       * c-parser.cc (c_parser_generic_selection): Increment and
+       decrement in_generic.  Use pop_maybe_used, save_maybe_used and
+       restore_maybe_used.
+
+2025-10-08  Martin Uecker  <uecker@tugraz.at>
+
+       * c-parser.cc (c_parser_generic_selection): Change
+       error_at to pedwarn_c23.
+
+2025-10-08  Alfie Richards  <alfie.richards@arm.com>
+
+       PR target/122180
+       * c-decl.cc (pushdecl): Add TARGET_HAS_FMV_TARGET_ATTRIBUTE check.
+
 2025-10-07  Joseph Myers  <josmyers@redhat.com>
 
        PR c/26581

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 26434756b336e3dc59cd9bb49829df0a68d19814..5099caab06d10f23137694dadf8e86a160ede0ea 100644 (file)
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,10 @@
+2025-10-08  Jason Merrill  <jason@redhat.com>
+
+       * init.cc (build_new_1): Also clobber for non-placement new.
+       Only loop clobber in constexpr.
+       * expr.cc (wrap_with_if_consteval): New.
+       * cp-tree.h (wrap_with_if_consteval): Declare.
+
 2025-10-07  Jason Merrill  <jason@redhat.com>
 
        * init.cc (build_new_1): Clobber a constant-bound array as a whole.

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index b57bfb9d513a5b55ceebb6b3161ce483df4c8b65..08bc1b3d8bf00e709d4ec7b2cbc7bb2d6728098c 100644 (file)
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,35 @@
+2025-10-08  Harald Anlauf  <anlauf@gmx.de>
+
+       PR fortran/49111
+       * decl.cc (verify_bind_c_sym): Modify condition for generation of
+       accessibility warning, and adjust warning message.
+
+2025-10-08  Paul Thomas  <pault@gcc.gnu.org>
+
+       PR fortran/93175
+       PR fortran/102240
+       PR fortran/102686
+       * array.cc (match_array_element_spec): For pdt templates, call
+       gfc_correct_parm_expr to elimante extraneous symbols from the
+       bound expressions.
+       * decl.cc (correct_parm_expr, gfc_correct_parm_expr): New fcns
+       that remove symbols that are not PDT parameters from the type
+       specification expressions.
+       (insert_parameter_exprs): Process function symbols as if they
+       are variables in the substitution with parameter expressions.
+       (gfc_get_pdt_instance): Make sure that the parameter list of
+       PDT components is updated as the instance is built. Move the
+       construction of pdt_strings down a bit in the function and
+       remove the tie up with pdt_arrays.
+       * gfortran.h: Add prototype for gfc_correct_parm_expr.
+       * resolve.cc (resolve_component): Skip testing for constant
+       specification expressions in pdt_template component string
+       lengths and pdt_strings.
+       * trans-array.cc (structure_alloc_comps): Remove testing for
+       deferred parameters and instead make sure that components of
+       PDT type have parameters substituted with the parameter exprs
+       of the enclosing PDT.
+
 2025-10-07  Paul Thomas  <pault@gcc.gnu.org>
 
        PR fortran/102901

diff --git a/gcc/jit/ChangeLog b/gcc/jit/ChangeLog
index 7e31500bae0bcce0afa755215fe6ac77b7d42232..1577ea06aac5588073de782029ea0b68276d702d 100644 (file)
--- a/gcc/jit/ChangeLog
+++ b/gcc/jit/ChangeLog
@@ -1,3 +1,36 @@
+2025-10-08  Antoni Boucher  <bouanto@zoho.com>
+
+       PR jit/112466
+       * Make-lang.in (JIT_OBJS): New variable.
+       * jit-playback.cc (replay): Include jit-target.h and initialize
+       target.
+       * jit-playback.h (class populate_target_info): New class.
+       * jit-recording.cc (recording::context::populate_target_info): New
+       method.
+       * jit-recording.h (recording::context::populate_target_info): New
+       method.
+       (recording::context::m_populated_target_info): New field.
+       * libgccjit.cc: Include jit-target.h.
+       (struct gcc_jit_target_info): New struct.
+       (gcc_jit_context_get_target_info, gcc_jit_target_info_release,
+       gcc_jit_target_info_cpu_supports, gcc_jit_target_info_arch,
+       gcc_jit_target_info_supports_target_dependent_type): New functions.
+       * libgccjit.h (gcc_jit_context_get_target_info,
+       gcc_jit_target_info_release, gcc_jit_target_info_cpu_supports,
+       gcc_jit_target_info_arch,
+       gcc_jit_target_info_supports_target_dependent_type):
+       New functions.
+       * libgccjit.map (LIBGCCJIT_ABI_35): New ABI tag.
+       * docs/topics/compilation.rst: Add documentation for the
+       functions gcc_jit_context_get_target_info, gcc_jit_target_info_release,
+       gcc_jit_target_info_cpu_supports, gcc_jit_target_info_arch,
+       gcc_jit_target_info_supports_target_dependent_type.
+       * docs/topics/compatibility.rst (LIBGCCJIT_ABI_35): New ABI tag.
+       * jit-target-def.h: New file.
+       * jit-target.cc: New file.
+       * jit-target.def: New file.
+       * jit-target.h: New file.
+
 2025-10-07  Jonathan Wakely  <jwakely@redhat.com>
 
        * docs/_build/texinfo/libgccjit.texi: Fix spelling.

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ff10abf7b2274248977ff1aef31978b7f6c0e18f..3b6a2744e0b44cb6e4f14afd4b1ead7508d1a5b5 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,90 @@
+2025-10-08  Joseph Myers  <josmyers@redhat.com>
+
+       * gcc.dg/c11-generic-4.c, gcc.dg/c23-generic-5.c,
+       gcc.dg/c2y-generic-5.c: New tests.
+
+2025-10-08  Harald Anlauf  <anlauf@gmx.de>
+
+       PR fortran/49111
+       * gfortran.dg/binding_label_tests_9.f03: Adjust test.
+       * gfortran.dg/module_private_2.f90: Likewise.
+       * gfortran.dg/public_private_module_2.f90: Likewise.
+       * gfortran.dg/binding_label_tests_35.f90: New test.
+
+2025-10-08  Martin Uecker  <uecker@tugraz.at>
+
+       * gcc.dg/c11-generic-2.c: Adapt error message.
+       * gcc.dg/c2y-generic-3.c: Adapt test.
+       * gcc.dg/c2y-generic-4.c: New test.
+
+2025-10-08  Jakub Jelinek  <jakub@redhat.com>
+
+       * c-c++-common/cpp/named-universal-char-escape-1.c: Add test for
+       \N{CJK UNIFIED IDEOGRAPH-3340E}.
+
+2025-10-08  Jason Merrill  <jason@redhat.com>
+
+       * g++.dg/analyzer/new-2.C: Adjust diags.
+       * g++.dg/analyzer/noexcept-new.C: Adjust diags.
+       * g++.dg/warn/Warray-bounds-23.C: Add warnings.
+       * g++.dg/warn/Warray-bounds-24.C: Add warnings.
+       * g++.dg/cpp26/constexpr-new4a.C: New test.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/110223
+       PR tree-optimization/122128
+       * gcc.dg/vect/vect-bool-2.c: New testcase.
+       * gcc.dg/vect/vect-bool-cmp-3.c: Likewise.
+       * gcc.dg/vect/vect-bool-cmp-4.c: Likewise.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       PR testsuite/120100
+       * g++.dg/vect/pr64410.cc: Adjust.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       PR target/120091
+       * gcc.target/i386/pr119919.c: Only check for vectorization
+       when !ia32.
+
+2025-10-08  Alfie Richards  <alfie.richards@arm.com>
+
+       PR target/122180
+       * gcc.target/i386/pr122180.c: New test.
+
+2025-10-08  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c/122188
+       * c-c++-common/pr122188.c: New test.
+
+2025-10-08  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/121206
+       * gcc.dg/pr121987.c (main): Use unsigned long long type for e instead
+       of unsigned long and use ULL suffix on the initializer.
+
+2025-10-08  Paul Thomas  <pault@gcc.gnu.org>
+
+       PR fortran/93175
+       PR fortran/102240
+       PR fortran/102686
+       * gfortran.dg/pdt_55.f03: New test.
+
+2025-10-08  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/105490
+       * gcc.dg/vect/vect-cond-14.c: New testcase.
+
+2025-10-08  Antoni Boucher  <bouanto@zoho.com>
+
+       PR jit/112466
+       * jit.dg/all-non-failing-tests.h: Mention
+       test-target-info.c.
+       * jit.dg/test-target-info.c: New test.
+       * jit.dg/test-error-target-info.c: New test.
+
 2025-10-07  Joseph Myers  <josmyers@redhat.com>
 
        PR c/26581

diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog
index 4a05748a368d9c58ea913d5d7d1ea1375ff2a979..43d3f39dd086426cdf40a86b70299806d19551ec 100644 (file)
--- a/libcpp/ChangeLog
+++ b/libcpp/ChangeLog
@@ -1,3 +1,16 @@
+2025-10-08  Jakub Jelinek  <jakub@redhat.com>
+
+       * makeucnid.cc (write_copyright): Adjust copyright year.
+       * makeuname2c.cc (generated_ranges): Adjust end points for a couple
+       of ranges based on UnicodeData.txt Last changes and add a whole new
+       CJK UNIFIED IDEOGRAPH- entry.  None of these changes are in the 4-8
+       table, but clearly it has just been forgotten.
+       (write_copyright): Adjust copyright year.
+       (write_dict): Fix up condition when to print semicolon.
+       * generated_cpp_wcwidth.h: Regenerate.
+       * ucnid.h: Regenerate.
+       * uname2c.h: Regenerate.
+
 2025-09-23  David Malcolm  <dmalcolm@redhat.com>
 
        PR diagnostics/121986

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index e8f244b9364e0db0a9b9f03c802ed0fb968cdea1..5eeb4cffdc22cdc3c80caf06d3fca0572aa86f7e 100644 (file)
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,153 @@
+2025-10-08  Jonathan Wakely  <jwakely@redhat.com>
+
+       * doc/xml/manual/status_cxx2017.xml: Replace broken link to PSTL
+       upstream.
+       * doc/xml/manual/status_cxx2020.xml: Likewise.
+       * doc/html/manual/status.html: Regenerate.
+
+2025-10-08  Jonathan Wakely  <jwakely@redhat.com>
+
+       * config/cpu/i486/atomicity.h: Removed.
+
+2025-10-08  Jonathan Wakely  <jwakely@redhat.com>
+
+       PR libstdc++/122172
+       * config/cpu/cris/atomicity.h: Removed.
+
+2025-10-08  Jonathan Wakely  <jwakely@redhat.com>
+
+       * include/bits/indirect.h (indirect::operator=(indirect&&)):
+       Move assign allocator when POCMA is true.
+       (polymorphic::operator=(polymorphic&&)): Likewise.
+       * testsuite/std/memory/indirect/copy.cc: Remove constexpr from
+       functions that use tracker_allocator. Add test_constexpr().
+       * testsuite/std/memory/indirect/copy_alloc.cc: Remove constexpr
+       from all functions and remove static_assert.
+       * testsuite/std/memory/indirect/ctor.cc: Do not use
+       scoped_allocator_adaptor during constant evaluation.
+       * testsuite/std/memory/indirect/move.cc: Remove constexpr from
+       functions that use tracker_allocator. Add test_constexpr().
+       * testsuite/std/memory/indirect/move_alloc.cc: Remove constexpr
+       from all functions and remove static_assert.
+       * testsuite/std/memory/indirect/relops.cc: Invoke lambda in
+       static_assert.
+       * testsuite/std/memory/polymorphic/copy.cc: Remove constexpr
+       from functions that use tracker_allocator. Add test_constexpr().
+       * testsuite/std/memory/polymorphic/copy_alloc.cc: Remove
+       constexpr from all functions and remove static_assert.
+       * testsuite/std/memory/polymorphic/ctor.cc: Do not use
+       scoped_allocator_adaptor during constant evaluation.
+       * testsuite/std/memory/polymorphic/ctor_poly.cc: Likewise.
+       * testsuite/std/memory/polymorphic/move.cc: Remove constexpr
+       from functions that use tracker_allocator. Add test_constexpr().
+       * testsuite/std/memory/polymorphic/move_alloc.cc: Remove
+       constexpr from all functions and remove static_assert.
+       * testsuite/util/testsuite_allocator.h (tracker_allocator):
+       Remove redundant 'inline' from friend.
+       (uneq_allocator): Make all functions constexpr.
+       (uneq_allocator::base, uneq_allocator::swap_base): Remove.
+       (uneq_allocator::~uneq_allocator): Remove.
+       (uneq_allocator::allocate, uneq_allocator::deallocate): Do not
+       use map of allocations during constant evaluation.
+       (propagating_allocator): Make all functions constexpr.
+       (propagating_allocator::base): Remove.
+       (propagating_allocator::swap_base): Simplify.
+       (ExplicitConsAlloc, CustomPointerAlloc, NullablePointer): Add
+       constexpr to all functions.
+
+2025-10-08  Jakub Jelinek  <jakub@redhat.com>
+
+       * include/bits/unicode-data.h: Regenerate.
+       * testsuite/ext/unicode/properties.cc: Test __is_extended_pictographic
+       on U+1F004 rather than U+1F000.
+
+2025-10-08  Tomasz Kamiński  <tkaminsk@redhat.com>
+
+       * include/bits/chrono_io.h (_ChronoData::_M_fill_day): Replace
+       '%' by '/'.
+
+2025-10-08  Jonathan Wakely  <jwakely@redhat.com>
+
+       * testsuite/std/time/format/format.cc: Include <vector>.
+
+2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>
+
+       PR libstdc++/110352
+       * include/std/mdspan (submdspan_mapping_result): New class.
+       * src/c++23/std.cc.in (submdspan_mapping_result): Add.
+
+2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>
+
+       PR libstdc++/110352
+       * include/std/mdspan (full_extent_t): New class.
+       * src/c++23/std.cc.in (full_extent_t): Add.
+
+2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>
+
+       PR libstdc++/110352
+       * include/bits/version.def (submdspan): New internal macro.
+       * include/bits/version.h: Regenerate.
+       * include/std/mdspan (strided_slice): New class.
+       * src/c++23/std.cc.in (strided_slice): Add.
+       * testsuite/23_containers/mdspan/submdspan/strided_slice.cc: New test.
+       * testsuite/23_containers/mdspan/submdspan/strided_slice_neg.cc: New test.
+
+2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>
+
+       * include/std/mdspan (__mdspan::__index_type_cast): Optimize by
+       skipping a __glibcxx_assert if it's know at compile-time.
+       (std::layout_left_padded, std::layout_righ_padded): Reorder
+       is_always_strided and is_unique member functions.
+       * testsuite/23_containers/mdspan/int_like.h: Rename _M_i to
+       value.
+
+2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>
+
+       PR libstdc++/110352
+       * include/std/mdspan (_RightPaddedIndices): Traits for right
+       padded layouts.
+       (layout_right::mapping::mapping) New overload for right padded
+       layouts.
+       (layout_right_padded): Add implementation.
+       * src/c++23/std.cc.in (layout_right_padded): Add.
+       * testsuite/23_containers/mdspan/layouts/ctors.cc: Update
+       test for right padded layouts.
+       * testsuite/23_containers/mdspan/layouts/empty.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/mapping.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/padded.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/padded_neg.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/padded_traits.h: Ditto.
+
+2025-10-08  Luc Grosheintz  <luc.grosheintz@gmail.com>
+
+       PR libstdc++/110352
+       * include/bits/version.def (padded_layouts): Add new internal
+       feature testing macro.
+       * include/bits/version.h: Regenerate.
+       * include/std/mdspan (__fwd_prod): New overload.
+       (layout_left_padded): Add declaration and implementation.
+       (layout_right_padded): Add declaration only.
+       (layout_left::mapping::mapping): New overload for left
+       padded mappings.
+       (__index_type_cast): New function that performs a checked cast
+       to index_type.
+       (__is_left_padded_mapping): New concept.
+       (__is_right_padded_mapping): Ditto.
+       (__standardized_mapping): Recognize left and right padded
+       mappings.
+       (_LeftPaddedIndices): Traits for left padded details.
+       (_PaddedStorage): New class for implementing padded layouts.
+       * src/c++23/std.cc.in (layout_left_padded): Add.
+       * testsuite/23_containers/mdspan/layouts/class_mandate_neg.cc:
+       Refactor and add tests for layout_left_padded.
+       * testsuite/23_containers/mdspan/layouts/ctors.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/empty.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/mapping.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/padded.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/padded_neg.cc: Ditto.
+       * testsuite/23_containers/mdspan/layouts/padded_traits.h: New
+       traits.
+
 2025-10-07  Jonathan Wakely  <jwakely@redhat.com>
 
        * configure.host: Fix spelling in comment.