GCC Digest

Gcc-15-20260418 is now available

Sat, 18 Apr 2026 00:00:00 GMT

GCC 15 snapshot is available for testing.

Glob to match bare-metal SuperH target triple in config.gcc seems wrong

Sat, 18 Apr 2026 00:00:00 GMT

The glob "sh*-superh-elf" in config.gcc may incorrectly identify SuperH bare-metal targets.

AArch64: Fix a comment typo.

Sat, 18 Apr 2026 00:00:00 GMT

Corrects a typo in an AArch64-specific comment.

Libstdc++: Fix constantness of engaged -> disengaged std::optional.

Sat, 18 Apr 2026 00:00:00 GMT

Clearing a `std::optional` in C++23 now maintains constant expression requirements, fixing a compile-time error.

D: Fix ICE in gimplify_var_or_parm_decl.

Sat, 18 Apr 2026 00:00:00 GMT

Fixes an internal compiler error (ICE) in the D frontend related to assert statements.

Consider adding another pass_late_combine after pass_reorder_blocks

Fri, 17 Apr 2026 00:00:00 GMT

Adding another pass_cprop_hardreg after pass_reorder_blocks shows code size improvements in x86_64 Linux kernel builds.

Discuss policy for using LLM tools in GCC development

Fri, 17 Apr 2026 00:00:00 GMT

The discussion revolves around establishing a clear policy on the use of AI tools in GCC development, particularly regarding code generation and copyright impl…

Discussing GCC Policy on LLM-Assisted Code

Fri, 17 Apr 2026 00:00:00 GMT

The GCC steering committee is drafting a policy on the use of LLMs, leaning towards allowing AI for assistance but not for generating code.

Continue LLM policy discussion

Fri, 17 Apr 2026 00:00:00 GMT

Continuing the discussion on LLM use policy, reiterating concerns around fully automated AI contributions.

FOSSY 2026 to host toolchain track in North America

Fri, 17 Apr 2026 00:00:00 GMT

FOSSY 2026 in Vancouver, Canada will feature a toolchain track for GCC, Binutils, GDB, glibc, and related projects; talk proposals are due June 1st.

Further thoughts on LLM use in GCC development

Fri, 17 Apr 2026 00:00:00 GMT

The thread explores potential use cases for LLMs in GCC, including patch review pre-screening, while emphasizing the need for a clear policy and serious disclo…

Gcc-14-20260417 Is Now Available

Fri, 17 Apr 2026 00:00:00 GMT

A new snapshot of GCC 14 is available for testing.

C++: Reject splicing of function parameters in reflection.

Fri, 17 Apr 2026 00:00:00 GMT

Disallows splicing of function parameters in C++ reflection, enforcing the standard's restrictions.

Ada: Fix excessive compilation time for decimal literal with large exponent

Fri, 17 Apr 2026 00:00:00 GMT

Fixes a case where compiling decimal literals with large exponents in Ada code took an excessively long time.

Ada: Fix internal error on decimal literal with huge exponent

Fri, 17 Apr 2026 00:00:00 GMT

Addresses a compiler crash when processing decimal literals with extremely large exponents in Ada code.

C++: Improve constexpr call hashing and garbage collection.

Fri, 17 Apr 2026 00:00:00 GMT

Optimizes constexpr call hashing and garbage collection to prevent use-after-free issues in recursive lambda evaluations.

C++: Correct -Wkeyword-macro warnings for contracts-related keywords.

Fri, 17 Apr 2026 00:00:00 GMT

Adjusts -Wkeyword-macro warnings to correctly handle contract-related keywords like `pre` and `post`.

c++/reflection: splicing null reflection

Fri, 17 Apr 2026 00:00:00 GMT

The compiler now detects and handles splicing of null reflections in C++ reflection.

Fortran: Fix wrong result for SPREAD with ncopies < 0.

Fri, 17 Apr 2026 00:00:00 GMT

The `SPREAD` intrinsic in Fortran now correctly handles negative `ncopies` arguments, which produce a zero-sized array.

Fix lto-devirt-23.C testcase failure.

Fri, 17 Apr 2026 00:00:00 GMT

The compiler was incorrectly assuming that destructors can't be in construction, leading to a test failure fixed by removing an ineffective check.

ARM, BitInt: Add hard-float ABI support for exception and rounding modes.

Fri, 17 Apr 2026 00:00:00 GMT

Adds support for handling floating-point exceptions and rounding modes with the hard-float ABI on ARM, used by BitInt software emulation for floating-point con…

Fix handling of anonymous type vtables in ipa-devirt.

Fri, 17 Apr 2026 00:00:00 GMT

The compiler now correctly handles anonymous type vtables during interprocedural devirtualization by tracking construction vtables of derived types.

Libstdc++: Update Solaris baselines for GCC 16.1.

Fri, 17 Apr 2026 00:00:00 GMT

Updates the libstdc++ baseline symbol lists for Solaris targets in preparation for the GCC 16.1 release.

libstdc++: Fix constraint recursion in std::indirect's operator==.

Fri, 17 Apr 2026 00:00:00 GMT

This patch avoids constraint recursion in `std::indirect`'s `operator==` by using a dependent function parameter.

Libstdc++: Update baseline symbols for several Linux architectures.

Fri, 17 Apr 2026 00:00:00 GMT

Updates baseline symbols for several Linux architectures in libstdc++ to reflect recent changes.

Libstdc++: Update baseline symbols for various Linux architectures.

Fri, 17 Apr 2026 00:00:00 GMT

Updates baseline symbols for several Linux architectures in libstdc++, mainly based on Fedora package builds and analysis of GCC 15 changes.

Middle-end: Disable CRC pass under -Os when CRC optabs are missing.

Fri, 17 Apr 2026 00:00:00 GMT

Disables the CRC table-based expansion during optimization for size (`-Os`) when the target architecture lacks specific CRC instruction support.

Vect: Unrestrict test cases for non-gather elementwise loads.

Fri, 17 Apr 2026 00:00:00 GMT

Test cases for vectorization of non-gather elementwise loads are no longer specific to early break vectorization and are unrestricted.

c++/reflection: Tweak reflection_function_template_p

Thu, 16 Apr 2026 00:00:00 GMT

Improves C++ reflection by using a narrower type check for function templates.

gccrs: Add `#![no_core]` attribute to most tests

Thu, 16 Apr 2026 00:00:00 GMT

Reverts the addition of the `#![no_core]` attribute from test suite harness files in gccrs.

gccrs: ast: Fix module path resolution for sibling modules in root

Thu, 16 Apr 2026 00:00:00 GMT

Simplifies a test case in gccrs by using standard DejaGnu idioms for skipping unsupported targets.

Libstdc++: Skip std::generate_canonical tests for IBM long double.

Thu, 16 Apr 2026 00:00:00 GMT

Skips tests for `std::generate_canonical` with long double type on POWER architectures using IBM's long double format.

nvptx: Support '-mptx=4.0'

Thu, 16 Apr 2026 00:00:00 GMT

Adds support for PTX version 4.0 to the nvptx backend.

nvptx: Support '-march=sm_50'

Thu, 16 Apr 2026 00:00:00 GMT

Adds support for the sm_50 architecture to the nvptx backend.

Fortran: Fix free-form mixed OpenACC/OpenMP continuation state

Wed, 15 Apr 2026 00:00:00 GMT

Fixes a test case for free-form Fortran code that mixes OpenACC and OpenMP directives.

Fix mix of OpenACC and OpenMP sentinels in continuations

Wed, 15 Apr 2026 00:00:00 GMT

Fixes a test case with mixed OpenACC and OpenMP sentinels by moving it to the combined test suite.

Merge current set of OpenACC changes from gomp-4_0-branch

Wed, 15 Apr 2026 00:00:00 GMT

Updates a test case to use the combined OpenACC/OpenMP test suite.

OpenMP: Handle rest of EXEC_OACC_* in oacc_code_to_statement

Wed, 15 Apr 2026 00:00:00 GMT

Updates a test case for OpenMP to use the combined OpenACC/OpenMP test suite.

OpenMP: Teach omp_code_to_statement about rest of OpenMP statements

Wed, 15 Apr 2026 00:00:00 GMT

Updates a test case to use the combined OpenACC/OpenMP test suite.

OpenMP: Ensure variables in offload table are streamed out

Tue, 14 Apr 2026 00:00:00 GMT

Adds an OpenACC test case to ensure variables are streamed out correctly in offload scenarios.

Libgomp: Fix missing disassociation in target pointer management.

Fri, 10 Apr 2026 00:00:00 GMT

Addresses a multi-device issue by ensuring that target pointers are disassociated after being associated in OpenMP target regions.

Fix incorrect length for __builtin_bswap16.

Thu, 02 Apr 2026 00:00:00 GMT

Corrects the instruction length attribute for `__builtin_bswap16` on Microblaze to prevent scheduling errors.

Libstdc++: Improve Doxygen comments in .

Wed, 01 Apr 2026 00:00:00 GMT

Improves the Doxygen comments in the `` header for better documentation of the library.

Libstdc++: Add comments to non-obvious parts of std::print internals.

Fri, 13 Mar 2026 00:00:00 GMT

Adds clarifying comments to the internal implementation of `std::print` in libstdc++.

Libstdc++: Ensure module initialization functions are present in the library.

Wed, 11 Mar 2026 00:00:00 GMT

Adds module initialization functions to libstdc++.so and libstdc++.a, ensuring users of std and std.compat modules don't need manual linking.

Libstdc++: Allow non-inline definition of std::print functions.

Tue, 10 Mar 2026 00:00:00 GMT

Introduces a macro to optionally disable inline definitions of `std::print` functions, reducing compile times.

Document d and D suffixes as defined by decimal float TR

Wed, 10 Dec 2025 00:00:00 GMT

The d and D suffixes for decimal floating-point literals are now documented.

Fix time zone for 'cobol.dg/group2/FUNCTION_DATE___TIME_OMNIBUS.cob'

Fri, 18 Apr 2025 00:00:00 GMT

Re-applies a fix for the time zone in a COBOL test case.