Landing: 891ea0b202c2

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Project / Subsystem

gcc / phiopt

Date

2026-04-16

Author

Andrew Pinski

Commit

891ea0b202c2d55025847bbbb4d86d1f50f5257c

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: phiopt
patch_id: —
commit_hash: 891ea0b202c2d55025847bbbb4d86d1f50f5257c
source_type: github
headline: phiopt: Trigger CFG cleanup when cselim-limited makes changes.
tldr: The phiopt pass now triggers control flow graph cleanup when the cselim-limited optimization makes changes, preventing empty basic blocks.
author: Andrew Pinski
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • optimization
• phi nodes
• control flow graph
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/891ea0b202c2d55025847bbbb4d86d1f50f5257c
date: 2026-04-16T00:00:00.000Z

The phiopt pass now sets the cfgchanged flag when the cselim-limited optimization performs modifications. This ensures that a control flow graph (CFG) cleanup pass is triggered, removing any empty basic blocks that may be left behind by cselim-limited. This prevents the creation of empty basic blocks.