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From: "gaius at gcc dot gnu.org" <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: Tue, 06 Jun 2023 14:26:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110126

--- Comment #1 from Gaius Mulley <gaius at gcc dot gnu.org> ---
The procedure test is unreachable, if the module is re-written as:

MODULE fooasm ;

VAR x: INTEGER;

PROCEDURE test;
BEGIN
  ASM("" : : "m"(x));
END test;

BEGIN
   test
END fooasm.


then the assembly output for procedure test in gm2 -S fooasm.mod looks simi=
lar
to:

static int x;

void test (void)
{
  asm ("" : : "m"(x));
}=