[llvm] [llvm] Proofread AMDGPUUsage.rst (PR #163331)

[Kazu Hirata via llvm-commits]

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@@ -6005,7 +6005,7 @@ The fields used by CP for code objects before V3 also match those specified in
      FLOAT_DENORM_MODE_FLUSH_NONE           3     No Flush
      ====================================== ===== ====================================
 
-  Denormal flushing is sign respecting. i.e. the behavior expected by
+  Denormal flushing is sign respecting. i.e., the behavior expected by
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kazutakahirata wrote:

Thanks!  I'm going with `,` because `the behavior expected by ...` is a noun phrase.


https://github.com/llvm/llvm-project/pull/163331