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Re: [patches] Re: preofile.c versus setjmp
On Tue, Aug 07, 2001 at 07:30:49PM +0200, Jan Hubicka wrote:
> Assume that the abnormal edge targets instruction after CALL. Then
> emitting any code to the fallthru edge between call and next basic block
> would result in incorrect code (as it will get executed on the abnormal
> path too).
Yep. We cannot insert instructions on either edge.
> Should be the fallthru edge also abnormal?
I wouldn't have thought so, but I can see how it might solve some
problems.
> Assume that the abnormal edge targets the basic block starting CALL.
This would be wildly incorrect.
> OK, would be sane to write patch to make both edges (fallthru and
> entry-to-the-next-block abnormal? What other flags they should get?)
Yes, but this is starting to sound like something for a branch.
r~