A few more tweaks to the blocks AST representation:

  - BlockDeclRefExprs always store VarDecls
  - BDREs no longer store copy expressions
  - BlockDecls now store a list of captured variables, information about
    how they're captured, and a copy expression if necessary
    
With that in hand, change IR generation to use the captures data in       
blocks instead of walking the block independently.        

Additionally, optimize block layout by emitting fields in descending
alignment order, with a heuristic for filling in words when alignment
of the end of the block header is insufficient for the most aligned
field.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125005 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 2 deletions

diff --git a/include/clang/Sema/ScopeInfo.h b/include/clang/Sema/ScopeInfo.h
index 0ba61b34eb..edd1432d8e 100644
--- a/include/clang/Sema/ScopeInfo.h
+++ b/include/clang/Sema/ScopeInfo.h
@@ -116,8 +116,11 @@ public:
   /// Its return type may be BuiltinType::Dependent.
   QualType FunctionType;
 
-  /// Captures - The set of variables captured by this block.
-  llvm::SmallSetVector<VarDecl*, 4> Captures;
+  /// CaptureMap - A map of captured variables to (index+1) into Captures.
+  llvm::DenseMap<VarDecl*, unsigned> CaptureMap;
+
+  /// Captures - The captured variables.
+  llvm::SmallVector<BlockDecl::Capture, 4> Captures;
 
   /// CapturesCXXThis - Whether this block captures 'this'.
   bool CapturesCXXThis;