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From: "carll at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/94833] vec_first_match_index does not function as
 described in its description
Date: Tue, 28 Apr 2020 22:13:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94833

--- Comment #2 from Carl Love <carll at gcc dot gnu.org> ---
The ABI has the builtin VEC_FIRST_MATCH_OR_EOS_
INDEX (ARG1, ARG2) which says

Returns the element index of the position of either the first character mat=
ch
or an end-of-string (EOS) terminator. If no match or terminator, returns the
number of characters as an element count in the vector argument.

So, I do agree the builtin in question should be treating the EOS (null) as=
 any
other number for comparison purposes.=