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[Bug middle-end/82885] memcpy does not propagate aliasing knowledge
- 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: Wed, 08 Nov 2017 12:34:01 +0000
- Subject: [Bug middle-end/82885] memcpy does not propagate aliasing knowledge
- Auto-submitted: auto-generated
- References: <bug-82885-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82885
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |alias, missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-11-08
CC| |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
It's also difficult because there's no representation for "[ch1, ch1 +
1024*1024[ and [ch2, ch2 + 1024+1024[" do not overlap.