[clang] [llvm] [X86] Support apxf in attribute target (PR #184078)

[via cfe-commits]

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@@ -174,6 +174,15 @@ bool X86TargetInfo::initFeatureMap(
       continue;
     }
 
+    if (Feature == "+apxf" || Feature == "-apxf") {
+      std::vector<StringRef> APXFeatures;
+      llvm::X86::expandAPXFeatures(Feature == "-apxf", getTriple().isOSWindows(),
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Andarwinux wrote:

Is this still necessary? Windows now fully supported egpr/ppx/push2pop2.

https://github.com/llvm/llvm-project/pull/184078