[llvm] [AMDGPU][True16][CodeGen] update waitcnt for true16 (PR #128927)

[Joe Nash via llvm-commits]

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@@ -137,10 +137,10 @@ enum WaitEventType {
 // We reserve a fixed number of VGPR slots in the scoring tables for
 // special tokens like SCMEM_LDS (needed for buffer load to LDS).
 enum RegisterMapping {
-  SQ_MAX_PGM_VGPRS = 512, // Maximum programmable VGPRs across all targets.
-  AGPR_OFFSET = 256,      // Maximum programmable ArchVGPRs across all targets.
-  SQ_MAX_PGM_SGPRS = 256, // Maximum programmable SGPRs across all targets.
-  NUM_EXTRA_VGPRS = 9,    // Reserved slots for DS.
+  SQ_MAX_PGM_VGPRS = 1024, // Maximum programmable VGPRs across all targets.
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Sisyph wrote:

The tracking is not differentiated by the presence or absence of True16 instructions on the subtarget. So it would 2x the size of unsigned VgprScores, which also causes 2x the iterations in the for loop in determineWait and setScoreByInterval on all subtargets.

https://github.com/llvm/llvm-project/pull/128927