[llvm] RuntimeLibcalls: Add function signatures to RTLIB. (PR #226264)

[Matt Arsenault via llvm-commits]

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@@ -421,6 +433,48 @@ const uint8_t RTLIB::RuntimeLibcallsInfo::RuntimeLibcallNameSizeTable[] = {
   emitNameMatchHashTable(OS, Table);
 }
 
+void RuntimeLibcallEmitter::emitGetInitRuntimeLibcallSignatures(
+    raw_ostream &OS) const {
+
+  using Signature = std::vector<StringRef>;
+  SequenceToOffsetTable<Signature> SignatureTable("NoFuncArgType");
+
+  auto GetSignature = [](const Record *R) -> Signature {
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arsenm wrote:

Move to proper method?

https://github.com/llvm/llvm-project/pull/226264