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

[Matt Arsenault via llvm-commits]

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@@ -154,6 +155,46 @@ static IntegerType *getSizeTType(LLVMContext &Ctx, const DataLayout &DL) {
   return DL.getIndexType(Ctx, /*AddressSpace=*/0);
 }
 
+static Type *convertToIRType(FuncArgTypeID ID, LLVMContext &Ctx,
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arsenm wrote:

Should add a fixme to use the ABI library 

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