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From: Thomas Petazzoni via buildroot <buildroot@buildroot.org>
To: Yegor Yefremov <yegorslists@googlemail.com>
Cc: buildroot@buildroot.org,
	 Giulio Benetti <giulio.benetti@benettiengineering.com>,
	Romain Naour <romain.naour@gmail.com>
Subject: Re: [Buildroot] [PATCH 1/2] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_104820
Date: Sun, 25 Oct 2026 21:49:03 +0100	[thread overview]
Message-ID: <at5rOEEPBPmmYSjV@windsurf> (raw)
In-Reply-To: <20261024215009.1004860-1-yegorslists@googlemail.com>

On Sat, Oct 24, 2026 at 11:50:08PM +0200, Yegor Yefremov wrote:
> -fzero-call-used-regs is broken on MIPS before R6, which still has the
> hi/lo registers: gcc either rejects -fzero-call-used-regs=used for
> functions using them:
> 
>   sorry, unimplemented: argument 'used' is not supported for '-fzero-call-used-regs' on this target
> 
> or, depending on the code, the ABI and the optimization level, ICEs:
> 
>   during RTL pass: zero_call_used_regs
>   channels.c:437:1: internal compiler error: in int_mode_for_mode, at stor-layout.cc:408
> 
> This has been reported upstream, and is still present in gcc 15.3.0:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104820
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104817
> 
> MIPS R6 doesn't have hi/lo and is not affected.
> 
> Assisted-by: Claude:claude-opus-5-5
> Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>

Series applied to master, thanks!

Best regards,

Thomas Petazzoni
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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      parent reply	other threads:[~2026-10-25 20:49 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-24 21:50 [Buildroot] [PATCH 1/2] toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_104820 Yegor Yefremov
2026-10-24 21:50 ` [Buildroot] [PATCH 2/2] package/openssh: fix build on MIPS before R6 at -O0 Yegor Yefremov
2026-10-25 20:49 ` Thomas Petazzoni via buildroot [this message]

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