[PATCH][RFA][PR target/15184] Partial fix for direct byte access on x86

[Mike Stump]

On Jan 27, 2015, at 10:08 PM, Jeff Law <law@redhat.com> wrote:
> We're still going to need the changes to the heuristic to enable 4 insn combinations

Yeah, I’ve love for a masters student to come up with a sane way to do 16 or less and enhance gcc to do that.  Things like, oh, this pattern is a dead end here, so, no point in trying any combinations with it, or, oh, look, a set or extend, these are really popular in the patterns in this port and I can see 100 ways these can form a basis for combination.

As I recall llvm doesn’t limit itself to 3.