[llvm] [llvm][mc][riscv] MC support of T-Head vector extension (xtheadvector) (PR #84447)

[Wang Pengcheng via llvm-commits]

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@@ -406,11 +420,8 @@ bool RISCVISAInfo::isSupportedExtension(StringRef Ext, unsigned MajorVersion,
                                         unsigned MinorVersion) {
   for (auto ExtInfo : {ArrayRef(SupportedExtensions),
                        ArrayRef(SupportedExperimentalExtensions)}) {
-    auto Range =
-        std::equal_range(ExtInfo.begin(), ExtInfo.end(), Ext, LessExtName());
-    for (auto I = Range.first, E = Range.second; I != E; ++I)
-      if (I->Version.Major == MajorVersion && I->Version.Minor == MinorVersion)
-        return true;
+    return findExtensionIn(ExtInfo, Ext, MajorVersion, MinorVersion) !=
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wangpc-pp wrote:

This change doesn't belong to this PR I think.

https://github.com/llvm/llvm-project/pull/84447