[llvm] [TLI] Add basic support for fdim libcall (PR #108702)

[Matt Arsenault via llvm-commits]

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@@ -337,6 +338,7 @@ static void initializeLibCalls(TargetLibraryInfoImpl &TLI, const Triple &T,
     TLI.setUnavailable(LibFunc_powl);
     TLI.setUnavailable(LibFunc_remainderl);
     TLI.setUnavailable(LibFunc_remquol);
+    TLI.setUnavailable(LibFunc_fdiml);
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arsenm wrote:

Don't believe this is tested 

https://github.com/llvm/llvm-project/pull/108702