[clang] [llvm] Split fmv and extensions (PR #92882)

[Alexandros Lamprineas via llvm-commits]

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@@ -0,0 +1,84 @@
+// Function MultiVersioning (FMV) properties
+
+// Something you can add to target_version or target_clones
+class FMVExtension<string n, string b, string f, int p> {
+    // Name, as spelled in target_version or target_clones. e.g. "memtag"
+    string Name = n;
+
+    // A C++ expression giving the number of the bit in the FMV ABI.
+    // Currently this is given as a value from the enum "CPUFeatures".
+    // If this is not set, it indicates that this is not an FMV extension.
+    string Bit = b;
+
+    // SubtargetFeatures to enable for code functions with this FMV feature.
+    // TODO list<SubtargetFeature> BackendFeatures = f;
+    string BackendFeatures = f;
+
+    // The FMV priority.
+    int Priority = p;
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labrinea wrote:

unsigned?

https://github.com/llvm/llvm-project/pull/92882