This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/71050] [7 regression] test case gcc.target/powerpc/lhs-1.c fails starting with r236066
- From: "wschmidt at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 11 May 2016 13:52:43 +0000
- Subject: [Bug tree-optimization/71050] [7 regression] test case gcc.target/powerpc/lhs-1.c fails starting with r236066
- Auto-submitted: auto-generated
- References: <bug-71050-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71050
--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Sorry, accidentally saved before finishing my thoughts.
How do we "inform" the middle-end that a DI subreg of a DF is very expensive?
This differs wildly by processor for us. We "can" always do the subreg, it's
just that on older processors we do it in a horrible way.