[clang] [llvm] [Clang][BPF] Allow sign extension for int type call parameters (PR #84874)

[via llvm-commits]

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@@ -22,6 +22,19 @@ class BPFABIInfo : public DefaultABIInfo {
 public:
   BPFABIInfo(CodeGenTypes &CGT) : DefaultABIInfo(CGT) {}
 
+  bool isPromotableIntegerTypeForABI(QualType Ty) const {
+    if (ABIInfo::isPromotableIntegerTypeForABI(Ty) == true)
+      return true;
+
+    if (const auto *BT = Ty->getAs<BuiltinType>()) {
+      // For 'signed int' type, return true to allow sign-extension.
+      if (BT->getKind() == BuiltinType::Int)
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yonghong-song wrote:

> should BuiltinType::UInt be included as well?

Yes, make sense. I will add that as well.

https://github.com/llvm/llvm-project/pull/84874