Landing: 6658c2347d4a

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Project / Subsystem

gcc / fortran

Date

2026-07-03

Author

Mikael Morin

Commit

6658c2347d4a88d82e80f44a450b14dc7287bcef

Source

github

Perf win

No

Breaking

No

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All attributes

project: gcc
subsystem: fortran
patch_id: —
commit_hash: 6658c2347d4a88d82e80f44a450b14dc7287bcef
source_type: github
headline: fortran: Don't reuse original descriptors for packed arrays [PR125998]
tldr: Fixes Fortran packed array descriptor creation to ensure correct memory layout and bounds.
author: Mikael Morin
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • fortran
• gfortran
• array
• descriptor
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/6658c2347d4a88d82e80f44a450b14dc7287bcef
date: 2026-07-03T00:00:00.000Z

This commit corrects how GCC’s Fortran frontend, gfortran, handles descriptors for packed arrays, particularly in the context of array parameters and transposed arrays. It prevents the reuse of original array descriptors, which could lead to incorrect memory layouts (e.g., using transposed data for non-transposed packed arrays). The changes ensure that new descriptors are created and that bounds, strides, and offsets are correctly calculated based on the packed array’s actual dimensions and layout, addressing issues related to PR97592 and PR125998.