Landing: 2ef1fe741998

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Project / Subsystem

gcc / rs6000

Date

2026-07-21

Author

Jeevitha

Commit

2ef1fe741998203a107fa81221ab6ce0428ebadc

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: rs6000
patch_id: —
commit_hash: 2ef1fe741998203a107fa81221ab6ce0428ebadc
source_type: github
headline: Add %W print modifier for VSX register pair printing on rs6000
tldr: The rs6000 backend now supports a '%W' modifier for printing VSX register pairs, enabling better instruction display for `__vector_pair` operands.
author: Jeevitha
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • rs6000
• powerpc
• compiler
• assembly
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/2ef1fe741998203a107fa81221ab6ce0428ebadc
date: 2026-07-21T00:00:00.000Z

A new ‘%W’ print modifier has been added to the rs6000 backend’s print_operand function. This modifier is designed to display the second VSX register in a pair, which is crucial for representing __vector_pair operands in assembly output. This enhancement supports future Power instruction patterns that require printing both registers of a VSX pair.