Bug ID: JDK-8325467 Support methods with many arguments in C2

JDK-8325467 : Support methods with many arguments in C2

Type: Enhancement
Component: hotspot
Sub-Component: compiler
Affected Version: 23,25

Priority: P4
Status: Resolved
Resolution: Fixed

Submitted: 2024-02-08
Updated: 2025-10-15
Resolved: 2025-09-24

Versions (Unresolved/Resolved/Fixed)

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JDK 26
26 b17Fixed

Related Reports

Duplicate :	JDK-8346707 - String concat with many fields will cause c2 compilation failure
Duplicate :	JDK-8324839 - Return address mask creation fails with assert(reg < CHUNK_SIZE) failed: sanity
Relates :	JDK-8342156 - C2: Compilation failure with fewer arguments after JDK-8329032
Relates :	JDK-8325497 - Investigate C2 issues identified by the "JVM Performance Comparison for JDK 21"
Relates :	JDK-8237900 - CTW: C2 compilation bails with "unsupported calling sequence" due to too many outgoing arguments
Relates :	JDK-8360701 - Add bailout when the register allocator interference graph grows unreasonably large

Sub Tasks

JDK-8367397 :

Improve naming and terminology in regmask.hpp and regmask.cpp - Resolved

Description

If a method has a large number of arguments, we currently bail out from C2 compilation. See JDK-8237900.

Comments

Changeset: faf6df54 Branch: master Author: Daniel Lundén <dlunden@openjdk.org> Date: 2025-09-24 15:02:40 +0000 URL: https://git.openjdk.org/jdk/commit/faf6df5462d6c915434128a876e76fa48f7e3599

24-09-2025

A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/20404 Date: 2024-07-31 12:36:38 +0000

07-08-2024