[llvm] TargetLibraryInfo: Assume no libcalls in the default constructor (PR #92400)

[Teresa Johnson via llvm-commits]

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@@ -288,6 +288,8 @@ bool PlaceSafepointsPass::runImpl(Function &F, const TargetLibraryInfo &TLI) {
     // with for the moment.
     legacy::FunctionPassManager FPM(F.getParent());
     bool CanAssumeCallSafepoints = enableCallSafepoints(F);
+
+    FPM.add(new TargetLibraryInfoWrapperPass(TLI));
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teresajohnson wrote:

I think this should probably be split out into a separate preparatory PR, since it is fixing an existing issue as a side effect exposed by the main change here  (iiuc previously too many builtins were available, which was caught by making none available by default).

https://github.com/llvm/llvm-project/pull/92400