[clang] [clang][PowerPC] Add flag to enable compatibility with GNU for complex arguments (PR #77732)

[Amy Kwan via cfe-commits]

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@@ -337,12 +350,77 @@ CharUnits PPC32_SVR4_ABIInfo::getParamTypeAlignment(QualType Ty) const {
   return CharUnits::fromQuantity(4);
 }
 
+ABIArgInfo PPC32_SVR4_ABIInfo::handleComplex(QualType Ty,
+                                             uint64_t &TypeSize) const {
+
+  assert(Ty->isAnyComplexType());
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amy-kwan wrote:

It would also be good if the assert has a message.
Additionally, for people who do not do assert builds, since `Ty` is only used for the assert, they may get an unused variable warning.

https://github.com/llvm/llvm-project/pull/77732