Landing: 1dc229c7368d

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Project / Subsystem

gcc / gimple-fold

Date

2026-08-27

Author

Jakub Jelinek

Commit

1dc229c7368d4f8b43356968f624e0d895961868

Source

github

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Breaking

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All attributes

project: gcc
subsystem: gimple-fold
patch_id: —
commit_hash: 1dc229c7368d4f8b43356968f624e0d895961868
source_type: github
headline: GIMPLE-fold: Fix vector length/store folding with bias.
tldr: Corrects folding of vector length load/store operations that use a target-specific bias.
author: Jakub Jelinek
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • optimization
• gimple
• vector
• backend
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/1dc229c7368d4f8b43356968f624e0d895961868
date: 2026-08-27T00:00:00.000Z

This commit corrects the GIMPLE optimization pass for folding vector length load and store operations when a target-specific bias is involved. The issue arose from incorrect handling of the bias, leading to miscalculations that could cause these operations to be incorrectly folded away. The fix adjusts the calculation to correctly incorporate the bias, ensuring accurate behavior, especially on targets like s390.