[llvm] [llvm-exegesis][AArch64] Disable pauth and ldgm as unsupported instructions (PR #132346)

[Sjoerd Meijer via llvm-commits]

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@@ -35,6 +35,14 @@ const ExegesisTarget *ExegesisTarget::lookup(Triple TT) {
   return nullptr;
 }
 
+static bool isPointerAuthOpcode(unsigned Opcode) {
+  return (Opcode >= 1648 && Opcode <= 1667); // AUT instruction class range
----------------
sjoerdmeijer wrote:

> So maybe we can check that the current CPU has FEAT_FPAC, and disable them only then?

Okidoki, thanks, that indeed seems the best thing to do.

Don't know if it's easy to query a CPU for features in llvm exegesis, but I guess that's the first thing to investigate now for @lakshayk-nv.


https://github.com/llvm/llvm-project/pull/132346