[clang] [llvm] [AMDGPU] Introduce asyncmark/wait intrinsics (PR #173259)

[Matt Arsenault via cfe-commits]

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@@ -538,6 +538,14 @@ TARGET_BUILTIN(__builtin_amdgcn_ashr_pk_u8_i32, "UsUiUiUi", "nc", "ashr-pk-insts
 TARGET_BUILTIN(__builtin_amdgcn_cvt_scalef32_2xpk16_fp6_f32, "V6UiV16fV16ff", "nc", "gfx950-insts")
 TARGET_BUILTIN(__builtin_amdgcn_cvt_scalef32_2xpk16_bf6_f32, "V6UiV16fV16ff", "nc", "gfx950-insts")
 
+//===----------------------------------------------------------------------===//
+// Async mark builtins.
+//===----------------------------------------------------------------------===//
+
+// FIXME: Not supported on GFX12 yet. Will need a new feature when we do.
+TARGET_BUILTIN(__builtin_amdgcn_asyncmark, "v", "n", "vmem-to-lds-load-insts")
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arsenm wrote:

This needs to be updated for the move to tablegen 

https://github.com/llvm/llvm-project/pull/173259