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[Bug target/79173] add-with-carry and subtract-with-borrow support (x86_64 and others)
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 23 Jan 2017 08:49:09 +0000
- Subject: [Bug target/79173] add-with-carry and subtract-with-borrow support (x86_64 and others)
- Auto-submitted: auto-generated
- References: <bug-79173-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79173
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-01-23
Version|unknown |7.0
Ever confirmed|0 |1
Severity|normal |enhancement
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed, the bug should possibly be split (Clang compatible builtins, target
specific detection of patterns, middle-end detection of patterns). Note a
suitable middle-end representation would not have the address argument but
likely
return two values (via the usual _Complex int trick).