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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/109004] [10/11/12/13 Regression] wrong code for -O2 (any
 above -O0) with g++ 11.3 for POWER9 (cross-compiler on x86_64 host)
Date: Thu, 16 Mar 2023 11:49:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109004

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The program uses xsmincdp and xsmaxcdp instructions and it feels as if qemu
implements the latter exactly the same as the former.
So, I guess simpler testcase would be compile with -O2 -mcpu=3Dpower9 -ffas=
t-math
__attribute__((noipa)) float
mymin (float x, float y)
{
  return __builtin_fminf (x, y);
}

__attribute__((noipa)) float
mymax (float x, float y)
{
  return __builtin_fmaxf (x, y);
}

int
main ()
{
  if (mymin (1.0f, 2.0f) !=3D 1.0f)
    __builtin_abort ();
  if (mymax (1.0f, 2.0f) !=3D 2.0f)
    __builtin_abort ();
}
and see if it aborts under qemu or not.=