Landing: 740f6ebc5c61

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Project / Subsystem

gcc / builtins

Date

2026-09-08

Author

Kyrylo Tkachov

Commit

740f6ebc5c61bef4c7dd9b9c6addc1946181f047

Source

github

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project: gcc
subsystem: builtins
patch_id: —
commit_hash: 740f6ebc5c61bef4c7dd9b9c6addc1946181f047
source_type: github
headline: Pass access direction to get_memory_rtx
tldr: Improves memory operand handling in built-ins by specifying load/store direction, preserving non-trapping info.
author: Kyrylo Tkachov
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • optimization
• builtins
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/740f6ebc5c61bef4c7dd9b9c6addc1946181f047
date: 2026-09-08T00:00:00.000Z

The get_memory_rtx function in builtins.cc previously created memory operands without distinguishing between loads and stores. This led to the loss of MEM_NOTRAP information for loads, as the default assumed store semantics. This commit adds a STORE_P argument to get_memory_rtx, allowing callers to explicitly mark destinations as stores and sources as loads. This preserves precise non-trapping information for loads used in string operations and comparisons.