Sync with upstream (2026-05-20): 5dfe1056b85f249e7b4ad454a59f2951c716191e #4550

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dkm wants to merge 454 commits into

gerris/rebase/2026-05-20

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Commits on May 9, 2026

Daily bump.
GCC Administrator
committed
match: Fix merged patterns for a!=b implies a and b are not zero [PR125234]
pinskia
committed
c++: always walk DECL_VALUE_EXPR in cp_genericize_r [PR121500]
Patrick Palka
committed
x86_cse: Check CONST0_RTX and CONSTM1_RTX
hjl-tools
committed
cfghooks: Move ir_type inside cfghooks
pinskia
committed
cfghooks: Remove name field
pinskia
committed
cfghooks: constifify cfg_hooks [PR117871]
pinskia
committed
x86_cse: Add a test for PR target/125245
hjl-tools
committed
[PATCH] RISC-V: Don't emit cm.popret when zcmp + zicfiss is enabled [PR125217]

MichielDerhaeg
authored and
Jeff Law
committed

Commits on May 10, 2026

Commits on May 11, 2026

Daily bump.
GCC Administrator
committed
[RISC-V][PR rtl-optimization/80770] Simplify bit flipping operations down to xor

Shreya Munnangi
and
Jeff Law
committed
[PATCH] combine: Check against CLOBBER in make_compound_operation_int [PR125209]

archbou
authored and
Jeff Law
committed
Update Email in MAINTAINERS
naveengowda-gcc
committed
[PATCH] [Aarch64]: Use fmov for some low-lane FP SIMD constant vectors
naveengowda-gcc
committed
combine: Reject any resulting insns using hard reg constraints [PR121426]
Stefan Schulze Frielinghaus
committed
adjust OMP SIMD call cost

rguenth
authored and
Richard Biener
committed
libstdc++: Reorder compile-time checks for __formatter_str::_M_format_range.
Tomasz Kamiński
committed
mingw: Ensure symbols are quoted in Intel syntax

lhmouse
authored and
jon-y
committed
tree-optimization/125250 - LIM speculating not noop load/store

rguenth
authored and
Richard Biener
committed
i386: Keep SEH enabled for Win64 sysv_abi functions

oltolm
authored and
jon-y
committed
Match: Move saturation alu patterns into match-sat-alu.pd [NFC]
Incarnation-p-lee
committed
AArch64: Turn on GPR narrowing pass by default
TamarChristinaArm
committed
xtensa: Define HONOR_REG_ALLOC_ORDER as 1

jjsuwa-sys3175
authored and
jcmvbkbc
committed
xtensa: Revise xtensa_expand_prologue()

jjsuwa-sys3175
authored and
jcmvbkbc
committed
xtensa: Assert the results of several validate_change() calls

jjsuwa-sys3175
authored and
jcmvbkbc
committed
fortran: Add -fcoarray=shared option to auto-link -lcaf_shmem
Jerry DeLisle
committed
c++: refine decl_defined_p
mpolacek
committed
c-family: look through non-user-facing typedef [PR124621]
jicama
committed
lm32: enable LRA after testing showed minimal regressions.

cr1901
authored and
Jeff Law
committed
hppa64: Fix linking of libgcc on HP-UX with GNU ld
John David Anglin
committed
c++/reflection: add null_reflection_p
jicama
committed
contrib: Fix check_GNU_style.py for some .opt issues [PR125275]
pinskia
committed

Commits on May 12, 2026

Daily bump.
GCC Administrator
committed
c++/reflection: fixes for comparing reflections [PR125208]
mpolacek
committed
[Aarch64]: Make aarch64_output_simd_mov_imm_low return const char *
naveengowda-gcc
committed
tree-optimization: Fold SAT_ADD at gimple level
naveengowda-gcc
committed
testsuite: riscv: reset -march for tests with -mcpu

Alexandre Oliva
authored and
Alexandre Oliva
committed
testsuite: pr94994: include stddef.h for size_t

Alexandre Oliva
authored and
Alexandre Oliva
committed
libstdc++: vxworks: enable clock_gettime

Alexandre Oliva
authored and
Alexandre Oliva
committed
vxworks: support aarch64 errata

Alexandre Oliva
authored and
Alexandre Oliva
committed
match.pd: rearrange (VCE (BFR)) simplification conditions [PR125259]
artemiy-volkov-arm
committed
Avoid setting ls_type when unused

rguenth
authored and
Richard Biener
committed
[PATCH 1/2] tree-optimization/vect: Allow commutative operand swap for IFN in SLP reduction

cuilili8868
and
algebra84
committed
[PATCH 2/2] tree-optimization/vect: Allow single-lane SLP fallback when limit is exhausted

cuilili8868
and
algebra84
committed
RX: Fix infinite-loop on LRA [PR113948]

ysat0
authored and
rsandifo
committed
sra: Fix build_user_friendly_ref_for_offset for bit-fields (PR124151)

jamborm
authored and
Martin Jambor
committed
testsuite: fix reflect/bases_of5.C for -m32
mpolacek
committed
libstdc++: Improve handling of leap second expiry time [PR123165]

jwakely
and
Tomasz Kamiński
committed
c++: deferred parsing of default arguments [PR50479]
mpolacek
committed
c++: -Wzero-as-null-pointer-constant and <=> [PR100903]
jicama
committed
Add warnings of potentially-uninitialized padding bits
chrisbazley
committed
hppa64: Don't define MD_EXEC_PREFIX to "/usr/ccs/bin" on hpux
John David Anglin
committed
doc: Remove unused reference to @gol macro.

Léo Hardt
authored and
pinskia
committed
ICE with -Winfinite-recursion due to recursive rather than work queue/list [PR124651]

Heiko Eißfeldt
authored and
pinskia
committed
cobol: Improved GENERIC for conditionals and comparisons.
Robert Dubner
committed

Commits on May 13, 2026

Daily bump.
GCC Administrator
committed
gfortran.dg/coarray: Require target sleep where calls were recently added, PR125005

hpataxisdotcom
authored and
Hans-Peter Nilsson
committed
testsuite: Move pr123286.c to gcc.target/aarch64/
naveengowda-gcc
committed
c++/reflection: reject invalid annotation on class [PR123609]

ch-zn
and
jicama
committed
c: avoid false positive for useless casts and generic [PR125261]

uecker
authored and
Martin Uecker
committed
libstdc++: Fix numeric save offset on Zone lines [PR124851]

alonamaloh
authored and
Tomasz Kamiński
committed
libgomp: Add stub omp_control_tool for OMPT
tob2
committed
libstdc++: Support ON-format DAY in Zone UNTIL field [PR124852]

alonamaloh
and
Tomasz Kamiński
committed
x86-64: Use R11 for DRAP register in preserve_none functions

hjl-tools
and
ubizjak
committed
libgomp.texi: Add the missing closing brace
hjl-tools
committed
Enabling POPCNT generation for 32-bit patterns.

Reshma Roy
authored and
vekumar-spe
committed
rs6000: Fix [su]mul<mode>3_highpart patterns to use RTL codes [PR122665]

jeevitha30
authored and
JeevithaPalanisamy
committed
Delay setting of slp_node->data in vectorizable_{load,store}

rguenth
authored and
Richard Biener
committed
Record (de-)composition type in ls_type for VMAT_STRIDED_SLP accesses

rguenth
authored and
Richard Biener
committed
testsuite: Skip new test case gcc.target/arm/muldi-1.c with -mthumb
rogersayle
committed
x86: Shorter load immediate constants with -Oz
rogersayle
committed
scev: maintain affine CHRECs in the presence of type conversions
TamarChristinaArm
committed
libstdc++: Test for unsupported engine range for 128bits floating points [PR119739]
Tomasz Kamiński
committed
MAINTAINERS: Add myself to write after approval and DCO.
ZhongyaoChen
committed
c++/reflection: overzealous complete_type in consteval_only_p [PR125280]
mpolacek
committed
libstdc++: Use type_identity_t for operator<=> parameter [PR114400]
Tomasz Kamiński
committed
RISC-V: Remove interleaved vector synthesis optimization [PR125215]
ZhongyaoChen
committed
libstdc++: rebuild configure

Alexandre Oliva
authored and
Alexandre Oliva
committed
libstdc++: Fix -Wsign-compare warning in new test
jwakely
committed
libstdc++: Add call to test_format in std/time/clock/local/io.cc
jwakely
committed
libstdc++: Remove trailing whitespace in shared_ptr_atomic.h
jwakely
committed

Commits on May 14, 2026

Daily bump.
GCC Administrator
committed
AVR: target/125194 - Make -mno-call-main work with -flto.
sprintersb
committed
libstdc++: Mark gencanon_eng_neg test as unsupported if __float128 is not available.
Tomasz Kamiński
committed
OpenMP: Improve interface comment for the omp_deep_mapping lang hooks
tob2
committed
libstdc++: Fix reserve of size_t(-1) elements in piecewise_constant_distribution. [PR113761]
Tomasz Kamiński
committed
doc: Fix description of GET_MODE_MASK
acoplan-arm
committed
[RISC-V] Drop unused parameters to restore bootstrap
Jeff Law
committed
libstdc++: Merge __type_identity and type_identity for C+20.
Tomasz Kamiński
committed
LoongArch: Improve xor+xor+ior sequence when possible [PR 96692]
xry111
committed
PR fortran/125092 - implement for binding label argument mismatch.
Thomas Koenig
committed
OpenMP: mapper [C/C++] reject w/o map usage, reject C++98, fix map decay
tob2
committed
PR124316: Fix ptwrite assembler mode
Andi Kleen
committed
c++/reflection: undeduced auto, deferred noexcept [PR124628]
Patrick Palka
committed
testsuite: Remove debugging puts from check_profiling_available
ubizjak
committed

Commits on May 15, 2026

Commits on May 16, 2026

Commits on May 17, 2026

Commits on May 18, 2026

Daily bump.
GCC Administrator
committed
x86: Don't inline memmove for -Os
hjl-tools
committed
libstdc++: Use on_month_day istream operator in ZoneInfo parsing. [PR124852]
Tomasz Kamiński
committed
i386: Implement bitreverse<mode>2 optab for GFNI [PR50481]
jakubjelinek
committed
libstdc++: Make is_exhaustive const for layout_(left/right)_padded
Tomasz Kamiński
committed
RISC-V: Fix format specifier.

Robin Dapp
authored and
Robin Dapp
committed
RISC-V: Remove blanket else in riscv_hard_regno_mode_ok.

Robin Dapp
authored and
Robin Dapp
committed
middle-end: Optimize reversed CRC table-based implementation
kito-cheng
committed
[PATCH] RX: The size of the mov instruction will be corrected

ysat0
authored and
Jeff Law
committed
libstdc++: Include range_access.h from <valarray>
Tomasz Kamiński
committed
libstdc++: optimize std::uninitialized_move{,_n}() to memcpy when possible [PR121789]

avikivity
authored and
jwakely
committed
libstdc++: Reduce iterations in PSTL test for Debug Mode
jwakely
committed
jit: clarify docs for gcc_jit_context_add_{command_line,driver}_option
davidmalcolm
committed
Modernize class optrecord_json_writer
davidmalcolm
committed
analyzer: drop unused field exploded_node::m_num_processed_stmts
davidmalcolm
committed
Update gcc sv.po
jsm28
committed
analyzer: rename --param=analyzer-{bb->supernode}-explosion-factor=
davidmalcolm
committed
[RISC-V] Improve ext-dce's live bit tracking for IOR/AND with a constant argument
Jeff Law
committed
[RISC-V] Improve SI->DI zero/sign extension patterns for RISC-V
Jeff Law
committed
[PATCH] RISC-V: Add xt-c9501fdvt CPU support

MouseSplinter
authored and
Jeff Law
committed
c++: remove dead code
mpolacek
committed
[PATCH v2] tree-optimization: Fix profile update in loop splitting (initial_true=false)

ywgrit
authored and
Jeff Law
committed
libstdc++: Move std::bitset test to correct directory
jwakely
committed
testsuite: Fix pr112095.c for veclowering
pinskia
committed

Commits on May 19, 2026

Commits on May 20, 2026

Daily bump.
GCC Administrator
committed
testsuite: Update CRC dump scan regex for reversed crc table
kito-cheng
committed
LoongArch: Fix missing plugin header for cpu-features.h [PR125362]

wszqkzqk
authored and
chenglulu326
committed
Limit outer-loop unswitching by duplicated code size
algebra84
committed
i386: Use vpaddq + vpermilpd for some non-const permutations [PR125357]
jakubjelinek
committed
libstdc++: fix build failures after acfdad706d8
ncm
committed
i386: Fix up peephole2s with const359_operand [PR125373]
jakubjelinek
committed
arc: check if the addend fits when referencing small data memory [PR115650]

MichielDerhaeg
authored and
claziss
committed
i386: Remove TARGET_SHIFT1 tuning feature
ubizjak
committed
Revert "Add files to discourage submissions of PRs to the GitHub mirror."

tschwinge
authored and
dkm
committed
Move 'gcc/rust/CONTRIBUTING.md', 'gcc/rust/README.md', 'gcc/rust/logo.png' to the top level

tschwinge
authored and
dkm
committed
ci: squashed original changes for initial github workflow

authored and
dkm
committed
docker: squashed original changes for Dockerfile

committed
github: squashed changed for PR template

committed
Create CODE_OF_CONDUCT.md

philberty
authored and
dkm
committed
Add script to generate gource

philberty
authored and
dkm
committed
add script to graph the changes over time

philberty
authored and
dkm
committed
Join justforfun.dev

philberty
authored and
dkm
committed
README.md: squashed many original changes

authored and
dkm
committed
ci: remove bors mention
dkm
committed
Add an alternative solution on MacOS

Jasmine Tang
authored and
dkm
committed
chore: Fix Remark CI

CohenArthur
authored and
dkm
committed
Change bug report issue template

P-E-P
authored and
dkm
committed
Add build dependencies for Fedora

jarkkojs
authored and
dkm
committed
ci: squashed many changes

CohenArthur
authored and
dkm
committed
ci: drop macos build

powerboat9
and
dkm
committed
ci: new workflow for sending emails after merging a PR

dkm
and
aytey
committed
Bump clang-format version to use in CONTRIBUTING.md

lowr
authored and
dkm
committed
ci: fix reference check
dkm
committed
ci: refactor ccpp workflow
dkm
committed
README: Add build dependencies for Fedora WSL

osalbahr
authored and
dkm
committed
ci: fix send email workflow in case of large commit log
dkm
committed
Clean up of obsolete nr2 command line option

fisnikhasani
authored and
dkm
committed
Fix corrupted GIMPLE for CompoundAssignmentExpr in const context

Islam-Imad
authored and
dkm
committed
Fix ICE in get_function_expr when cfg'd return type inside macro

Harishankar14
authored and
dkm
committed
ci: parse and expand gccrs github's issues
dkm
committed
Recognize warn and deny as built in attributes

powerboat9
authored and
dkm
committed
gccrs: Fix ICE cloning trait functions without return types

Lishin1215
authored and
dkm
committed
Add assert macro handler

P-E-P
authored and
dkm
committed
nr: Move path resolution from ForeverStack to NRCtx

CohenArthur
authored and
dkm
committed
nr: Do first part of path resolution in types NS

CohenArthur
authored and
dkm
committed
Defer literal suffix validation to parser and preserve source fidelity

nsvke
authored and
dkm
committed
lex: Emit E0768 for empty non-decimal literals

nsvke
authored and
dkm
committed
Add feature gate for rustc_const_stable attribute

P-E-P
authored and
dkm
committed
testsuite: Add a testcase for issue 3537

Harishankar14
authored and
dkm
committed
util: Switch VisType to an enum class and rename variants.

CohenArthur
authored and
dkm
committed
testsuite: Add a testcase for issue 4158

Harishankar14
authored and
dkm
committed
testsuite: Add a testcase for issue 4159

Harishankar14
authored and
dkm
committed
Merge remote-tracking branch 'upstream-gccrs/master' into gerris/rebase/2026-05-20
dkm
committed