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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/101683] Floating point exception for
 double->unsigned conversion on avx512 only
Date: Fri, 30 Jul 2021 02:47:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101683

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D9651
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot =
gnu.org

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Simple fix:
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index ec7a062829c..1ff701d6d4f 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -3261,6 +3261,7 @@ may_trap_p_1 (const_rtx x, unsigned flags)
       break;

     case FIX:
+    case UNSIGNED_FIX:
       /* Conversion of floating point might trap.  */
       if (flag_trapping_math && HONOR_NANS (XEXP (x, 0)))
        return 1;

This has always been a bug .....=