[llvm] Fix mechanism propagating mangled names for TLI function mappings (PR #66656)

[via llvm-commits]

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@@ -163,18 +177,18 @@ class TargetLibraryInfoImpl {
   /// Return true if the function F has a vector equivalent with vectorization
   /// factor VF.
   bool isFunctionVectorizable(StringRef F, const ElementCount &VF) const {
-    return !(getVectorizedFunction(F, VF, false).empty() &&
-             getVectorizedFunction(F, VF, true).empty());
+    return !(getVectorizedFunction(F, VF, false).first.empty() &&
+             getVectorizedFunction(F, VF, true).first.empty());
   }
 
   /// Return true if the function F has a vector equivalent with any
   /// vectorization factor.
   bool isFunctionVectorizable(StringRef F) const;
 
-  /// Return the name of the equivalent of F, vectorized with factor VF. If no
-  /// such mapping exists, return the empty string.
-  StringRef getVectorizedFunction(StringRef F, const ElementCount &VF,
-                                  bool Masked) const;
+  /// Return the name of the equivalent of F, vectorized with factor VF and it's
+  /// mangled name. If no such mapping exists, return empty strings.
+  std::pair<StringRef, StringRef>
+  getVectorizedFunction(StringRef F, const ElementCount &VF, bool Masked) const;
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JolantaJensen wrote:

Fixed.

https://github.com/llvm/llvm-project/pull/66656