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From: "admin@tho-otto.de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug modula2/110126] Variables are reported as unused when only
 referenced by ASM statements
Date: Wed, 07 Jun 2023 05:06:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110126

--- Comment #2 from Thorsten Otto <admin@tho-otto.de> ---
But even if i rewrite it like that, i still get the warning.

I avoided doing anything machine specific in the first example, but if i
actually do, and use something like:

PROCEDURE test;
BEGIN
  ASM("movl %1,%%eax; addl $1,%%eax; movl %%eax,%0" : "=3Dr"(x) : "0"(x) :
"eax");
END test;

i still get the warning.

BTW, is there a reason why the string in the asm statement can't be
concatenated?

eg. especially if the statement becomes longer, you would usually want to w=
rite
it something like

  ASM("movl %1,%%eax;" +
      "addl $1,%%eax;" +
      "movl %%eax,%0"
     : "=3Dr"(x) : "0"(x) : "eax");=