Bernd Schmidt <ber...@codesourcery.com> writes: > This appears to be because the split prologue contains a jump, which > means the find_many_sub_blocks call reorders the block numbers, and our > indices into bb_flags are off. > > I'm testing the following patch, but it won't finish today - feel free > to test and check it in, or to just disable shrink-wrapping with split > prologues.
Thinking about it I think this is the wrong approach. The -fsplit-stack code by definition has to wrap the entire function and it can not modify any callee-saved registers. We should do shrink wrapping before -fsplit-stack, not the other way around. Ian
