On Mon, 1 Aug 2011, Jakub Jelinek wrote: > On Mon, Aug 01, 2011 at 11:44:04AM +0800, Jiangning Liu wrote: > > It's quite necessary to solve the general problem in middle-end rather than > > in back-end. > > That's what we disagree on. All back-ends but ARM are able to handle it > right, why can't ARM too? The ABI rules for stack handling in the epilogues > are simply too diverse and complex to be handled easily in the scheduler.
Given that the long-standing open bugs relating to scheduling and stack adjustments (30282, 38644) include issues for Power that do not yet appear to have been fixed, even if other back ends are able to handle it right they don't seem to do so at present. -- Joseph S. Myers jos...@codesourcery.com
