Generate Attr subclasses with TableGen.

Now all classes derived from Attr are generated from TableGen.
Additionally, Attr* is no longer its own linked list; SmallVectors or
Attr* are used. The accompanying LLVM commit contains the updates to
TableGen necessary for this.

Some other notes about newly-generated attribute classes:

 - The constructor arguments are a SourceLocation and a Context&,
   followed by the attributes arguments in the order that they were
   defined in Attr.td

 - Every argument in Attr.td has an appropriate accessor named getFoo,
   and there are sometimes a few extra ones (such as to get the length
   of a variadic argument).

Additionally, specific_attr_iterator has been introduced, which will
iterate over an AttrVec, but only over attributes of a certain type. It
can be accessed through either Decl::specific_attr_begin/end or
the global functions of the same name.

llvm-svn: 111455

1 files changed, 4 insertions, 6 deletions

diff --git a/clang/lib/AST/RecordLayoutBuilder.cpp b/clang/lib/AST/RecordLayoutBuilder.cpp
index ad15917b88e..f42ba5a29fc 100644
--- a/clang/lib/AST/RecordLayoutBuilder.cpp
+++ b/clang/lib/AST/RecordLayoutBuilder.cpp
@@ -1123,8 +1123,8 @@ void RecordLayoutBuilder::InitializeLayout(const Decl *D) {
     if (const MaxFieldAlignmentAttr *MFAA = D->getAttr<MaxFieldAlignmentAttr>())
       MaxFieldAlignment = MFAA->getAlignment();
 
-    if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
-      UpdateAlignment(AA->getMaxAlignment());
+    if (unsigned MaxAlign = D->getMaxAlignment())
+      UpdateAlignment(MaxAlign);
   }
 }
 
@@ -1287,8 +1287,7 @@ void RecordLayoutBuilder::LayoutBitField(const FieldDecl *D) {
 
   if (FieldPacked || !Context.Target.useBitFieldTypeAlignment())
     FieldAlign = 1;
-  if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
-    FieldAlign = std::max(FieldAlign, AA->getMaxAlignment());
+  FieldAlign = std::max(FieldAlign, D->getMaxAlignment());
 
   // The maximum field alignment overrides the aligned attribute.
   if (MaxFieldAlignment)
@@ -1357,8 +1356,7 @@ void RecordLayoutBuilder::LayoutField(const FieldDecl *D) {
 
   if (FieldPacked)
     FieldAlign = 8;
-  if (const AlignedAttr *AA = D->getAttr<AlignedAttr>())
-    FieldAlign = std::max(FieldAlign, AA->getMaxAlignment());
+  FieldAlign = std::max(FieldAlign, D->getMaxAlignment());
 
   // The maximum field alignment overrides the aligned attribute.
   if (MaxFieldAlignment)