Landing: 090ff9c73c79

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Project / Subsystem

gcc / middle-end

Date

2026-09-26

Author

Tamar Christina

Commit

090ff9c73c79ab83eea66a010887a0ca8002ec6e

Source

github

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Breaking

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project: gcc
subsystem: middle-end
patch_id: —
commit_hash: 090ff9c73c79ab83eea66a010887a0ca8002ec6e
source_type: github
headline: Middle-end: Fix self-test failures for vector types
tldr: Corrects a self-test failure in the middle-end by using the correct vector element count for VLAs.
author: Tamar Christina
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • middle-end
• vectorization
• self-test
• aarch64
• risc-v
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/090ff9c73c79ab83eea66a010887a0ca8002ec6e
date: 2026-09-26T00:00:00.000Z

Recent self-tests for vector unroll folding in GCC’s middle-end were failing due to incorrect handling of vector types. The issue stemmed from using in_nelts instead of min_out_nelts when encoding vector types, which led to the wrong encoding for VLAs (Variable Length Arrays). This commit updates the test to use min_out_nelts, resolving the failure and ensuring correct handling for various architectures including ARM and RISC-V.