[llvm] [AMDGPU] Add initial version of gfx950 MFMA co-exec rules (PR #214682)

[Matt Arsenault via llvm-commits]

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@@ -346,12 +346,180 @@ inline CoExecInfo CoExecInfo::build(unsigned TotalWindow, const char *Pattern) {
   return Info;
 }
 
+/// Get co-execution info for a gfx950 MFMA instruction.
+/// The occupancy (cycles until the next MFMA may issue) is expressed as the
+/// first stage carrying the WMMA bit.
+inline CoExecInfo getMFMACoExecInfo(const MachineInstr &MI) {
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arsenm wrote:

Move out of line?

https://github.com/llvm/llvm-project/pull/214682