[clang] [llvm] [clang] Support the Swift calling convention on 32-bit PowerPC (PR #205457)

[Yuta Saito via cfe-commits]

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@@ -382,12 +382,26 @@ class PPC32_SVR4_ABIInfo : public DefaultABIInfo {
                    AggValueSlot Slot) const override;
 };
 
+/// Swift calling convention ABI for 32-bit PowerPC (SVR4/EABI).
+class PPC32SwiftABIInfo : public SwiftABIInfo {
+public:
+  explicit PPC32SwiftABIInfo(CodeGenTypes &CGT)
+      : SwiftABIInfo(CGT, /*SwiftErrorInRegister=*/false) {}
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kateinoigakukun wrote:

(same as MIPS) Q: Why we cannot use register-guaranteed swifterror? Is there any PowerPC limitation?

https://github.com/llvm/llvm-project/pull/205457