X86 Scheduling Models are incomplete

[MatzeB]

Bugzilla Link	26792
Version	trunk
OS	All
Blocks	#31672
CC	@adibiagio,@topperc,@RKSimon,@qcolombet

Extended Description

After r262384 tablegen checks whether scheduling models are actually complete. I had to mark X86 models as "CompleteModel = 0;" the models should be completed. The commit message of r262384 contains some tips on how to this in general.

[MatzeB]

assigned to @RKSimon

[RKSimon]

Btver2, SLM, Znver1 and BroadWell scheduler models are now flgged as complete.

The models can probably be tidied up by using UnsupportedFeatures (as described on Bug #​17367), but its useful to have some supporting all features just so no more instructions get added without suitable scheduling tags!

[RKSimon]

mentioned in issue #31672