commit b9da8a5dff8d07392ff4f7dcc45c9d7ff0836e28
author Stefan Maksimovic <stefan.maksimovic@mips.com> Mon Jul 30 10:44:46 2018 +0000
committer Stefan Maksimovic <stefan.maksimovic@mips.com> Mon Jul 30 10:44:46 2018 +0000
tree 86eb6bba1d79aba7be49fb83f2646807f71099b8
parent 0d466c41ff589665bfd427cf5c5096b3c932a88c

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

Additional info: see r338019.

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

llvm-svn: 338239

clang/lib/CodeGen/TargetInfo.cpp

diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index fa9b0a2..7652cb1 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/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 {