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

llvm-svn: 333814

1 files changed, 13 insertions, 0 deletions

diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index 456214f0668..2b9c4afaaf1 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -3580,6 +3580,16 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
       isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float16, Loc, PrevSpec,
                                      DiagID, Policy);
       break;
+    case tok::kw__Accum:
+      if (!getLangOpts().FixedPoint) {
+        DiagID = diag::err_fixed_point_not_enabled;
+        PrevSpec = "";  // Not used by diagnostic
+        isInvalid = true;
+      } else {
+        isInvalid = DS.SetTypeSpecType(DeclSpec::TST_accum, Loc, PrevSpec,
+                                       DiagID, Policy);
+      }
+      break;
     case tok::kw___float128:
       isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float128, Loc, PrevSpec,
                                      DiagID, Policy);
@@ -4606,6 +4616,7 @@ bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
   case tok::kw_half:
   case tok::kw_float:
   case tok::kw_double:
+  case tok::kw__Accum:
   case tok::kw__Float16:
   case tok::kw___float128:
   case tok::kw_bool:
@@ -4683,6 +4694,7 @@ bool Parser::isTypeSpecifierQualifier() {
   case tok::kw_half:
   case tok::kw_float:
   case tok::kw_double:
+  case tok::kw__Accum:
   case tok::kw__Float16:
   case tok::kw___float128:
   case tok::kw_bool:
@@ -4841,6 +4853,7 @@ bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
   case tok::kw_half:
   case tok::kw_float:
   case tok::kw_double:
+  case tok::kw__Accum:
   case tok::kw__Float16:
   case tok::kw___float128:
   case tok::kw_bool: