gcn: Add "s_nop"s for MI300HEADtrunkmaster

MI300 requires some additional s_nop to be added between some instructions.
* As 'v_readlane' and 'v_writelane' have to be distinguished, the
  'laneselect' attribute was changed from no/yes to no/read/write.
* Add some missing 'laneselect' attributes for v_(read,write)lane.
* Replace 'delayeduse' by 'flatmemaccess' which is more explicit,
  especially as some uses have to destinguished more details.
  (Alongside, one off-by-two delayeduse has been fixed.)

On the other hand, RDNA 2, 3, and 3.5 do not require any added s_nop;
thus, there is no need to walk the instructions for them to insert
pointless S_NOP. (RDNA4 (not yet in GCC) requires it in a few cases.)

gcc/ChangeLog:

	* config/gcn/gcn-opts.h (TARGET_NO_MANUAL_NOPS,
	TARGET_CDNA3_NOPS): Define.
	* config/gcn/gcn.md (define_attr "laneselect): Change 'yes' to
	'read' and 'write'.
	(define_attr "flatmemaccess"): Add with values store, storex34,
	load, atomic, atomicwait, cmpswapx2, and no. Replacing ...
	(define_attr "delayeduse"): Remove.
	(define_attr "transop"): Add with values yes and no.
	(various insns): Update 'laneselect', add flatmemaccess and transop,
	remove delayeduse; fixing an issue for s_load_dwordx4 vs.
	flat_store_dwordx4 related to delayeduse (now: flatmemaccess).
	* config/gcn/gcn-valu.md: Update laneselect attribute and add
	flatmemaccess.
	* config/gcn/gcn.cc (gcn_cmpx_insn_p): New.
	(gcn_md_reorg): Update for MI300 to add additional s_nop.
	Skip s_nop-insertion part for RDNA{2,3}; add "VALU writes EXEC
	followed by VALU DPP" unconditionally for CDNA2/CDNA3/GCN5.

0 files changed, 0 insertions, 0 deletions