From: Bernd Schmidt <ber...@codesourcery.com> Date: Tue, 15 Nov 2011 01:54:34 +0100
> On 11/15/11 01:43, Richard Henderson wrote: >> On 11/14/2011 11:56 AM, Alan Modra wrote: >>> * function.c (thread_prologue_and_epilogue_insns): Guard >>> emitting return with single_succ_p test. >> >> Hmm. This looks plausible too. >> >> Bernd's patch made sure that cfglayout didn't do something impossible. >> Of course, it's possible that his patch should merely be an assert, >> and the correct fix goes here. > > I haven't really looked at Alan's patch; I'm thinking there were > probably two bugs - the one I found being latent before. Note that the > problematic CFG exists way before thread_prologue_and_epilogue even > runs, so an assert would still trigger. I suspect that Alan's fix here will take care of the sparc ada bootstrap regression reported, and regardless if it's correct it should be installed.
