[llvm] [AMDGPU] Make max dwords of memory cluster configurable (PR #119342)

[Matt Arsenault via llvm-commits]

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@@ -163,6 +163,11 @@ SIMachineFunctionInfo::SIMachineFunctionInfo(const Function &F,
   if (!S.empty())
     S.consumeInteger(0, HighBitsOf32BitAddress);
 
+  A = F.getFnAttribute("amdgpu-max-memory-cluster-dwords");
+  S = A.getValueAsString();
+  if (!S.empty())
+    S.consumeInteger(0, MaxMemoryClusterDWords);
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arsenm wrote:

Use getFnAttributeAsParsedInteger 

https://github.com/llvm/llvm-project/pull/119342