[llvm] [TLI] Use the VFABI demangling when declaring vector variants. (PR #76753)

[Paschalis Mpeis via llvm-commits]

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@@ -35,35 +35,36 @@ STATISTIC(NumCompUsedAdded,
 
 /// A helper function that adds the vector function declaration that
 /// vectorizes the CallInst CI with a vectorization factor of VF
-/// lanes. The TLI assumes that all parameters and the return type of
-/// CI (other than void) need to be widened to a VectorType of VF
-/// lanes.
+/// lanes. For each mapping TLI contains a VABI prefix, which contains
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paschalis-mpeis wrote:

nit: I would rewrite maybe to something like:
For each mapping, TLI provides/has a VABI prefix, which contains ...

https://github.com/llvm/llvm-project/pull/76753