Landing: 92a49b653b21

← All landings

Project / Subsystem

gcc / testsuite

Date

2026-08-17

Author

Aldy Hernandez

Commit

92a49b653b21fc8cf55c114e24a83d6f40d19f2b

Source

github

Perf win

Breaking

View on GitHub →

All attributes

project: gcc
subsystem: testsuite
patch_id: —
commit_hash: 92a49b653b21fc8cf55c114e24a83d6f40d19f2b
source_type: github
headline: Add test case for path solver positional invariant
tldr: New test case reproduces a crash in the thread pass caused by incorrect path solver context.
author: Aldy Hernandez
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • testsuite
• optimization
• crashfix
• regression
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/92a49b653b21fc8cf55c114e24a83d6f40d19f2b
date: 2026-08-17T00:00:00.000Z

This commit adds a new test case to reproduce a crash that occurred in the thread pass at optimization level -O2, stemming from an incorrect positional context used by the path solver. The issue arose when match.pd queried the solver with a statement from an arbitrary block, leading to segfaults due to incorrect edge lookups when handling PHI nodes out of their expected block context.