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Date: Wed, 7 Jul 2021 09:55:17 -0500
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Jeff Law <jeffreyalaw@gmail.com>
Cc: liuhongt <hongtao.liu@intel.com>, jakub@redhat.com,
 richard.sandiford@arm.com, gcc-patches@gcc.gnu.org
Subject: Re: [PATCH 1/2] CALL_INSN may not be a real function call.
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On Mon, Jul 05, 2021 at 06:03:21PM -0600, Jeff Law wrote:
> It reminds me a bit of millicode calls on the PA or calls to special 
> routines in libgcc.  They're calls to functions, but those functions do 
> not follow the standard ABI.

Something with CALL_INSN_FUNCTION_USAGE?  And maybe some clobbers?


Segher