This diff includes changes for supporting the following types.

```

// Primary fixed point types
signed short _Accum s_short_accum;
signed _Accum s_accum;
signed long _Accum s_long_accum;
unsigned short _Accum u_short_accum;
unsigned _Accum u_accum;
unsigned long _Accum u_long_accum;

// Aliased fixed point types
short _Accum short_accum;
_Accum accum;
long _Accum long_accum;

```

This diff only allows for declaration of the fixed point types. Assignment and other operations done on fixed point types according to http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1169.pdf will be added in future patches. The saturated versions of these types and the equivalent `_Fract` types will also be added in future patches.

The tests included are for asserting that we can declare these types.

Differential Revision: https://reviews.llvm.org/D46084

1 files changed, 29 insertions, 0 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 2eec05c4396..4956710b4f5 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -1134,6 +1134,14 @@ void ASTContext::InitBuiltinTypes(const TargetInfo &Target,
   // C11 extension ISO/IEC TS 18661-3
   InitBuiltinType(Float16Ty,           BuiltinType::Float16);
 
+  // ISO/IEC JTC1 SC22 WG14 N1169 Extension
+  InitBuiltinType(ShortAccumTy,         BuiltinType::ShortAccum);
+  InitBuiltinType(AccumTy,              BuiltinType::Accum);
+  InitBuiltinType(LongAccumTy,          BuiltinType::LongAccum);
+  InitBuiltinType(UnsignedShortAccumTy, BuiltinType::UShortAccum);
+  InitBuiltinType(UnsignedAccumTy,      BuiltinType::UAccum);
+  InitBuiltinType(UnsignedLongAccumTy,  BuiltinType::ULongAccum);
+
   // GNU extension, 128-bit integers.
   InitBuiltinType(Int128Ty,            BuiltinType::Int128);
   InitBuiltinType(UnsignedInt128Ty,    BuiltinType::UInt128);
@@ -1785,6 +1793,21 @@ TypeInfo ASTContext::getTypeInfoImpl(const Type *T) const {
       Width = 128;
       Align = 128; // int128_t is 128-bit aligned on all targets.
       break;
+    case BuiltinType::ShortAccum:
+    case BuiltinType::UShortAccum:
+      Width = Target->getShortAccumWidth();
+      Align = Target->getShortAccumAlign();
+      break;
+    case BuiltinType::Accum:
+    case BuiltinType::UAccum:
+      Width = Target->getAccumWidth();
+      Align = Target->getAccumAlign();
+      break;
+    case BuiltinType::LongAccum:
+    case BuiltinType::ULongAccum:
+      Width = Target->getLongAccumWidth();
+      Align = Target->getLongAccumAlign();
+      break;
     case BuiltinType::Float16:
     case BuiltinType::Half:
       Width = Target->getHalfWidth();
@@ -6222,6 +6245,12 @@ static char getObjCEncodingForPrimitiveKind(const ASTContext *C,
     case BuiltinType::Float16:
     case BuiltinType::Float128:
     case BuiltinType::Half:
+    case BuiltinType::ShortAccum:
+    case BuiltinType::Accum:
+    case BuiltinType::LongAccum:
+    case BuiltinType::UShortAccum:
+    case BuiltinType::UAccum:
+    case BuiltinType::ULongAccum:
       // FIXME: potentially need @encodes for these!
       return ' ';