[AArch64 ACLE] Allow to define poly64_t as 'unsigned long long' on LLP64 system.

This fixes PR23414 as well.

llvm-svn: 237348

clang/lib/AST/ItaniumMangle.cpp

@@ -2311,6 +2311,7 @@ void CXXNameMangler::mangleAArch64NeonVectorType(const VectorType *T) {
       EltName = "Poly16";
       break;
     case BuiltinType::ULong:
+    case BuiltinType::ULongLong:
       EltName = "Poly64";
       break;
     default:

clang/lib/Sema/SemaChecking.cpp

@@ -623,7 +623,10 @@ static QualType getNeonEltType(NeonTypeFlags Flags, ASTContext &Context,
   case NeonTypeFlags::Poly16:
     return IsPolyUnsigned ? Context.UnsignedShortTy : Context.ShortTy;
   case NeonTypeFlags::Poly64:
-    return Context.UnsignedLongTy;
+    if (IsInt64Long)
+      return Context.UnsignedLongTy;
+    else
+      return Context.UnsignedLongLongTy;
   case NeonTypeFlags::Poly128:
     break;
   case NeonTypeFlags::Float16:

clang/test/CodeGenCXX/aarch64-neon.cpp

@@ -1,6 +1,8 @@
 // REQUIRES: aarch64-registered-target
 // RUN: %clang_cc1 -triple arm64-none-linux-gnu -target-feature +neon \
 // RUN:   -ffp-contract=fast -S -O3 -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple arm64-none-netbsd-gnu -target-feature +neon \
+// RUN:   -ffp-contract=fast -S -O3 -o - %s | FileCheck %s
 
 // Test whether arm_neon.h works as expected in C++.