Path: csiph.com!weretis.net!feeder6.news.weretis.net!news.misty.com!news.iecc.com!.POSTED.news.iecc.com!nerds-end From: Thomas Koenig Newsgroups: comp.compilers Subject: Re: Interpreters and caller-saved registers Date: Sun, 22 Oct 2023 18:43:47 -0000 Organization: Compilers Central Sender: johnl%iecc.com Approved: comp.compilers@iecc.com Message-ID: <23-10-004@comp.compilers> References: <23-10-001@comp.compilers> <23-10-002@comp.compilers> <23-10-003@comp.compilers> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Injection-Info: gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="9924"; mail-complaints-to="abuse@iecc.com" Keywords: interpreter, optimize Posted-Date: 23 Oct 2023 17:32:24 EDT X-submission-address: compilers@iecc.com X-moderator-address: compilers-request@iecc.com X-FAQ-and-archives: http://compilers.iecc.com Xref: csiph.com comp.compilers:3531 anton@mips.complang.tuwien.ac.at schrieb: > Thomas Koenig writes: >>It is well known that compilers in general and gcc specfically often >>generate superflous register moves > ... >>However, if this got worse between releases, this is a regression. >>Those get higher priority for fixing. So, if it is reasonable >>to generate a reduced test case (for which cvise, for example, >>is an excellent tool) so filing a bug report would be a good thing. > > If you want to file such a bug report, I can give you the commit of > Gforth before we added all the workarounds, where all the problems > are visible without ado. This reply shows an interesting aspect of compiler development that is often overlooked: The social aspect. Compiler writers generally want to improve their product, but they also generally feel that bug submitters (at least those who don't have a support contract) should also invest a minimum of work if he wants something fixed, and a general "look at large package xyz, it'll be obvious" is below that threshold. (This is the reason why gcc, for example, asks for a complete and self-contained test case in its bug reports.) People who complain about bugs, but are not willing to put in that minimum amount of work, are often ignored.