[llvm] [AMDGPU][SIInsertWaitcnts] Do not add s_waitcnt when the counters are known to be 0 already (PR #72830)

[Jay Foad via llvm-commits]

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@@ -181,7 +181,7 @@ body: |
 
 # CHECK-LABEL: name: preexisting_waitcnt{{$}}
 # CHECK: FLAT_LOAD_DWORD
-# CHECK-NEXT: S_WAITCNT 0
+# CHECK-NEXT: S_WAITCNT 0 
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jayfoad wrote:

Only spurious whitespace changes in this file.

https://github.com/llvm/llvm-project/pull/72830