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Date: Tue, 16 Nov 2021 09:42:58 +0100
From: Jan Hubicka <hubicka@kam.mff.cuni.cz>
To: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
Cc: gcc-bugs@gcc.gnu.org
Subject: Re: [Bug ipa/103267] Wrong code with ipa-sra
Message-ID: <20211116084258.GF71052@kam.mff.cuni.cz>
References: <bug-103267-4@http.gcc.gnu.org/bugzilla/>
 <bug-103267-4-DfbioEf2MD@http.gcc.gnu.org/bugzilla/>
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Works for me even with the 3 warnings.

hubicka@lomikamen:/aux/hubicka/trunk/build-lto2/gcc$ cat >tt.c
__attribute__ ((noinline,const))
infinite (int p)
{
  if (p)
    while (1);
  return p;
}
__attribute__ ((noinline))
static void
test(int p, int *a)
{
  int v = infinite (p);
  if (*a && v)
    __builtin_abort ();
}
test2(int *a)
{
  test(0,a);
}
main()
{
  test (1,0);
}
hubicka@lomikamen:/aux/hubicka/trunk/build-lto2/gcc$ ./xgcc --version
xgcc (GCC) 12.0.0 20211114 (experimental)
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

hubicka@lomikamen:/aux/hubicka/trunk/build-lto2/gcc$ ./xgcc -B ./ -O2 tt.c
tt.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
    2 | infinite (int p)
      | ^~~~~~~~
tt.c:16:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
   16 | test2(int *a)
      | ^~~~~
tt.c:20:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
   20 | main()
      | ^~~~
hubicka@lomikamen:/aux/hubicka/trunk/build-lto2/gcc$ ./a.out
Segmentation fault