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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/100858] Simple common code hoisting is not
 performed
Date: Wed, 02 Jun 2021 08:01:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100858

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-06-02
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
That's really a duplicate of 100858 - this case can be handled by sinking as
well
since we "sink" the return.  Make it

void bar();

int foo(bool f)
{
    if (f) {
        bar();
        __builtin_abort ();
    }
    else {
        bar();
        return 2;
    }
}

to force hoisting.  Hoisting is done by PRE but that requires a LHS and
doesn't handle calls with side-effects.=