[clang] [Sparc][clang] make `_Complex` ABI GCC-compatible (PR #212340)

[Folkert de Vries via cfe-commits]

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@@ -277,6 +310,15 @@ ABIArgInfo SparcV9ABIInfo::classifyType(QualType Ty, unsigned SizeLimit,
       return ABIArgInfo::getExtend(Ty);
     }
 
+  // When being GCC-compatible, cast a complex integer to an integer type
+  // of the right size to get the correct scalar-like behavior.
+  if (isComplexGnuABI(*this))
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folkertdev wrote:

slightly neater at the call site, but now the definition is duplicated? 

https://github.com/llvm/llvm-project/pull/212340