[clang] Add SME2 builtins for pfalse and ptrue (PR #71953)

[Kerry McLaughlin via cfe-commits]

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@@ -1981,6 +1979,11 @@ def SVCNTP_COUNT : SInst<"svcntp_{d}", "n}i", "QcQsQiQl", MergeNone, "aarch64_sv
 defm SVREVD : SInstZPZ<"svrevd", "csilUcUsUiUl", "aarch64_sve_revd">;
 }
 
+let TargetGuard = "sve2p1|sme2" in {
+  def SVPTRUE_COUNT  : SInst<"svptrue_{d}", "}v", "QcQsQiQl", MergeNone, "aarch64_sve_ptrue_{d}", [IsOverloadNone], []>;
+  def SVPFALSE_COUNT_ALIAS : SInst<"svpfalse_c", "}v", "", MergeNone, "", [IsOverloadNone]>;
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kmclaughlin-arm wrote:

The streaming mode attributes can now be added to these, I believe they are IsStreaming for ptrue and IsStreamingCompatible for pfalse.

https://github.com/llvm/llvm-project/pull/71953