r338239 - [mips64][clang] Provide the signext attribute for i32 return values

[Stefan Maksimovic via cfe-commits]

Author: smaksimovic
Date: Mon Jul 30 03:44:46 2018
New Revision: 338239

URL: http://llvm.org/viewvc/llvm-project?rev=338239&view=rev
Log:
[mips64][clang] Provide the signext attribute for i32 return values

Additional info: see r338019.

Differential Revision: https://reviews.llvm.org/D49289

Modified:
    cfe/trunk/lib/CodeGen/TargetInfo.cpp

Modified: cfe/trunk/lib/CodeGen/TargetInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/TargetInfo.cpp?rev=338239&r1=338238&r2=338239&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/TargetInfo.cpp (original)
+++ cfe/trunk/lib/CodeGen/TargetInfo.cpp Mon Jul 30 03:44:46 2018
@@ -6985,8 +6985,14 @@ ABIArgInfo MipsABIInfo::classifyReturnTy
   if (const EnumType *EnumTy = RetTy->getAs<EnumType>())
     RetTy = EnumTy->getDecl()->getIntegerType();
 
-  return (RetTy->isPromotableIntegerType() ? ABIArgInfo::getExtend(RetTy)
-                                           : ABIArgInfo::getDirect());
+  if (RetTy->isPromotableIntegerType())
+    return ABIArgInfo::getExtend(RetTy);
+
+  if ((RetTy->isUnsignedIntegerOrEnumerationType() ||
+      RetTy->isSignedIntegerOrEnumerationType()) && Size == 32 && !IsO32)
+    return ABIArgInfo::getSignExtend(RetTy);
+
+  return ABIArgInfo::getDirect();
 }
 
 void MipsABIInfo::computeInfo(CGFunctionInfo &FI) const {