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

[zhijian lin via cfe-commits]

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@@ -421,6 +503,11 @@ ABIArgInfo PPC32_SVR4_ABIInfo::classifyReturnType(QualType RetTy) const {
     }
   }
 
+  bool IsComplexInRegABI =
+      getCodeGenOpts().getComplexInRegABI() == CodeGenOptions::CMPLX_InGPR;
+  if (IsComplexInRegABI && RetTy->isAnyComplexType())
----------------
diggerlin wrote:

you do not need to introduce a new variable `IsComplexInRegABI` here since it only be used once.

change to 
`if ((getCodeGenOpts().getComplexInRegABI() == CodeGenOptions::CMPLX_InGPR) && RetTy->isAnyComplexType())`



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