[clang] [X86] Add USER_MSR instructions. (PR #68944)

[Freddy Ye via cfe-commits]

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@@ -325,6 +325,8 @@ def FeatureTSXLDTRK : SubtargetFeature<"tsxldtrk", "HasTSXLDTRK", "true",
                                        "Support TSXLDTRK instructions">;
 def FeatureUINTR : SubtargetFeature<"uintr", "HasUINTR", "true",
                                     "Has UINTR Instructions">;
+def FeatureUSERMSR : SubtargetFeature<"usermsr", "HasUSERMSR", "true",
+                                    "Support USERMSR instructions">;
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FreddyLeaf wrote:

3e32e495d8fa56ad3770769a5d4559ea0a41af96

https://github.com/llvm/llvm-project/pull/68944