[llvm] [NVPTX] Add syncscope support for cmpxchg (PR #140812)

[via llvm-commits]

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@@ -41,6 +41,27 @@ def AS_match {
   }];
 }
 
+multiclass nvvm_ternary_atomic_op_scoped<SDPatternOperator frag> {
+  defvar frag_pat = (frag node:$ptr, node:$cmp, node:$val);
+  def NAME#_cta: PatFrag<!setdagop(frag_pat, ops),
+      (!cast<SDPatternOperator>(NAME) node:$ptr, node:$cmp, node:$val), [{
+        return Scopes[cast<MemSDNode>(N)->getSyncScopeID()] == NVPTX::Scope::Block;
+  }]>;
+  def NAME#_cluster : PatFrag<!setdagop(frag_pat, ops),
+      (!cast<SDPatternOperator>(NAME) node:$ptr, node:$cmp, node:$val), [{
+        return Scopes[cast<MemSDNode>(N)->getSyncScopeID()] == NVPTX::Scope::Cluster;
+  }]>;
+  def NAME#_gpu: PatFrag<!setdagop(frag_pat, ops),
+      (!cast<SDPatternOperator>(NAME) node:$ptr, node:$cmp, node:$val), [{
+        return Scopes[cast<MemSDNode>(N)->getSyncScopeID()] == NVPTX::Scope::Device;
+  }]>;
+  def NAME#_sys: PatFrag<!setdagop(frag_pat, ops),
+      (!cast<SDPatternOperator>(NAME) node:$ptr, node:$cmp, node:$val), [{
+        return Scopes[cast<MemSDNode>(N)->getSyncScopeID()] == NVPTX::Scope::System;
+  }]>;
+}
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gonzalobg wrote:

@AlexMaclean @Artem-B extra pair of eyes here would be really appreciated.
The `NAME$_{sco} == NVPTX::Scope::{sco}` seems correct to me but I'm not an expert on tablegen.

https://github.com/llvm/llvm-project/pull/140812