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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/94541] -mx32 gcc produces wrong code passing structs by
 value
Date: Thu, 09 Apr 2020 14:40:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94541

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I don't have a -mx32 capable environment, so can't verify, but mmap/munmap
shouldn't be inlined in any way, so can you reproduce if you replace
mmap with foo and munmap with bar and define them like:
static char c;
__attribute__((noipa)) void *
foo (void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
  return (void *) &c;
}
__attribute__((noipa)) int
bar (void *addr, size_t length)
{
  if (addr !=3D (void *) &c)
    return -1;
  return 0;
}
or so?  If yes, can you also drop errno from the testcase, and possibly drop
unnecessary arguments to foo and/or bar as long as it reproduces?  Once
minimized that way, please preprocess it.=