[llvm] [ABI] Add DefaultTargetInfo for default argument/return classification (PR #225009)

[Steffen Larsen via llvm-commits]

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@@ -41,6 +41,10 @@ bool TargetInfo::isPromotableInteger(const IntegerType *IT) const {
   return BitWidth < 32;
 }
 
+unsigned TargetInfo::getBitIntRegThreshold() const {
+  return hasInt128Type() ? 128 : getLongLongWidth();
+}
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steffenlarsen wrote:

Nit; This seems small enough that it could just live in the headers. All the functions used should be available there.

https://github.com/llvm/llvm-project/pull/225009