[llvm-branch-commits] [llvm] [AMDGPU] Add stalls for DS FIFO buffer (PR #192323)

[Lucas Ramirez via llvm-branch-commits]

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@@ -172,6 +177,11 @@ class HardwareUnitInfo {
   /// / MFMA instructions may take multiple cycles, which may be overlapped with
   /// instructions on other HardwareUnits.
   bool ProducesCoexecWindow = false;
+  /// How many instructions can be held simultaneously for this HardwareUnit.
+  /// A value of 0 or 1 means that there is no buffer.
+  unsigned BufferSize = 0;
+  /// How many cycles it takes for an instruction to clear the buffer.
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lucas-rami wrote:

Can you mention here that this is an average/estimation and not a hardware property?

https://github.com/llvm/llvm-project/pull/192323