[PATCH] D49289: [mips64][clang] Provide the signext attribute for i32 return values

[Stefan Maksimovic via Phabricator via cfe-commits]

smaksimovic created this revision.
smaksimovic added a reviewer: atanasyan.
Herald added subscribers: arichardson, sdardis.

Patch for the backend part of the problem here: https://reviews.llvm.org/D48374


https://reviews.llvm.org/D49289

Files:
  lib/CodeGen/TargetInfo.cpp


Index: lib/CodeGen/TargetInfo.cpp
===================================================================
--- lib/CodeGen/TargetInfo.cpp
+++ lib/CodeGen/TargetInfo.cpp
@@ -6985,8 +6985,14 @@
   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 {


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