[clang] [llvm] [Clang][ABI][X86] Do not emit zeroext/signext for return values (PR #232729)

[Nikita Popov via cfe-commits]

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@@ -2385,8 +2397,8 @@ ABIArgInfo X86_64ABIInfo::getIndirectReturnResult(QualType Ty) const {
       return getNaturalAlignIndirect(Ty, getDataLayout().getAllocaAddrSpace());
 
     llvm::Type *IRTy = CGT.ConvertType(Ty);
-    return (isPromotableIntegerTypeForABI(Ty) ? ABIArgInfo::getExtend(Ty, IRTy)
-                                              : ABIArgInfo::getDirect(IRTy));
+    return shouldExtendReturnType(*this, Ty) ? ABIArgInfo::getExtend(Ty, IRTy)
+                                             : ABIArgInfo::getDirect(IRTy);
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nikic wrote:

If you're wondering how a promotable integer type could possibly end up on the indirect return code path, the answer is https://github.com/llvm/llvm-project/issues/232670.

https://github.com/llvm/llvm-project/pull/232729