[llvm] [AMDGPU] always emit a soft wait even if it is trivially ~0 (PR #147257)

Sameer Sahasrabuddhe via llvm-commits llvm-commits at lists.llvm.org
Thu Jul 10 01:20:44 PDT 2025


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@@ -669,6 +679,7 @@ define amdgpu_kernel void @global_volatile_store_1(
 ; GFX12-WGP-NEXT:    s_wait_kmcnt 0x0
 ; GFX12-WGP-NEXT:    s_wait_storecnt 0x0
 ; GFX12-WGP-NEXT:    global_store_b32 v0, v1, s[0:1] scope:SCOPE_SYS
+; GFX12-WGP-NEXT:    s_wait_loadcnt 0x3f
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ssahasra wrote:

"could we instead add a special pseudo-instruction" just directly contradicts the long term wish of "we should really just have a single waitcnt pseudo". Sincerely, I am not sure what the actual objection is.

https://github.com/llvm/llvm-project/pull/147257


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