http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54087
Andrew Macleod <amacleod at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #27927|0 |1
is obsolete| |
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-08-23
AssignedTo|unassigned at gcc dot |amacleod at redhat dot com
|gnu.org |
Ever Confirmed|0 |1
--- Comment #7 from Andrew Macleod <amacleod at redhat dot com> 2012-08-23
14:33:01 UTC ---
Created attachment 28074
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28074
Generic expansion patch proposal
This patch changes the tree-rtl expansion code to try using the complementary
atomic add or sub operation with a negative operand if an instruction sequence
is not created.
This will enable the optimization automatically for all targets.
Check to see if it solves the problem as well.
