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From: "luoxhu at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/22326] promotions (from float to double) are
 not removed when they should be able to
Date: Tue, 17 Nov 2020 07:10:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D22326

--- Comment #5 from luoxhu at gcc dot gnu.org ---
With above hack, changing argument x from float to double could still gener=
ate
correct code with conversion of fabsf result:

float foo(float f, double x, float y) {
return (fabs(f)*x+y);
}

006t.gimple
__attribute__((noinline))
foo (float f, double x, float y)
{
  float D.4347;

  _1 =3D ABS_EXPR <f>;
  _2 =3D (double) _1;
  _3 =3D x * _2;
  _4 =3D (double) y;
  _5 =3D _3 + _4;
  D.4347 =3D (float) _5;
  return D.4347;
}=