[PATCH] Restrict LOOP_ALIGN to loop headers only.

[Martin Liška]

Hi.

I'm suggesting to restrict LOOP_ALIGN to only loop headers. That are the
basic blocks for which it makes the biggest sense. I quite some binary
size reductions on SPEC2006 and SPEC2017. Speed numbers are also slightly
positive.

Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Ready to be installed?
Thanks,
Martin

gcc/ChangeLog:

2019-07-09  Martin Liska  <mliska@suse.cz>

	* final.c (compute_alignments): Apply the LOOP_ALIGN only
	to basic blocks that all loop headers.
---
 gcc/final.c | 1 +
 1 file changed, 1 insertion(+)


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