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, 39 insertions, 13 deletions

diff --git a/lib/AST/StmtDumper.cpp b/lib/AST/StmtDumper.cpp
index 8b62dcc940..5def7d9a0b 100644
--- a/lib/AST/StmtDumper.cpp
+++ b/lib/AST/StmtDumper.cpp
@@ -100,6 +100,7 @@ namespace  {
           OS << ":'" << QualType::getAsString(D_split) << "'";
       }
     }
+    void DumpDeclRef(Decl *node);
     void DumpStmt(const Stmt *Node) {
       Indent();
       OS << "(" << Node->getStmtClassName()
@@ -153,6 +154,7 @@ namespace  {
     void VisitBinaryOperator(BinaryOperator *Node);
     void VisitCompoundAssignOperator(CompoundAssignOperator *Node);
     void VisitAddrLabelExpr(AddrLabelExpr *Node);
+    void VisitBlockExpr(BlockExpr *Node);
 
     // C++
     void VisitCXXNamedCastExpr(CXXNamedCastExpr *Node);
@@ -362,21 +364,21 @@ void StmtDumper::VisitDeclRefExpr(DeclRefExpr *Node) {
   DumpExpr(Node);
 
   OS << " ";
-  switch (Node->getDecl()->getKind()) {
-  default: OS << "Decl"; break;
-  case Decl::Function: OS << "FunctionDecl"; break;
-  case Decl::Var: OS << "Var"; break;
-  case Decl::ParmVar: OS << "ParmVar"; break;
-  case Decl::EnumConstant: OS << "EnumConstant"; break;
-  case Decl::Typedef: OS << "Typedef"; break;
-  case Decl::Record: OS << "Record"; break;
-  case Decl::Enum: OS << "Enum"; break;
-  case Decl::CXXRecord: OS << "CXXRecord"; break;
-  case Decl::ObjCInterface: OS << "ObjCInterface"; break;
-  case Decl::ObjCClass: OS << "ObjCClass"; break;
+  DumpDeclRef(Node->getDecl());
+}
+
+void StmtDumper::DumpDeclRef(Decl *d) {
+  OS << d->getDeclKindName() << ' ' << (void*) d;
+
+  if (NamedDecl *nd = dyn_cast<NamedDecl>(d)) {
+    OS << " '";
+    nd->getDeclName().printName(OS);
+    OS << "'";
   }
 
-  OS << "='" << Node->getDecl() << "' " << (void*)Node->getDecl();
+  if (ValueDecl *vd = dyn_cast<ValueDecl>(d)) {
+    OS << ' '; DumpType(vd->getType());
+  }
 }
 
 void StmtDumper::VisitUnresolvedLookupExpr(UnresolvedLookupExpr *Node) {
@@ -474,6 +476,30 @@ void StmtDumper::VisitCompoundAssignOperator(CompoundAssignOperator *Node) {
   DumpType(Node->getComputationResultType());
 }
 
+void StmtDumper::VisitBlockExpr(BlockExpr *Node) {
+  DumpExpr(Node);
+
+  IndentLevel++;
+  BlockDecl *block = Node->getBlockDecl();
+  if (block->capturesCXXThis()) {
+    OS << '\n'; Indent(); OS << "(capture this)";
+  }
+  for (BlockDecl::capture_iterator
+         i = block->capture_begin(), e = block->capture_end(); i != e; ++i) {
+    OS << '\n';
+    Indent();
+    OS << "(capture ";
+    if (i->isByRef()) OS << "byref ";
+    if (i->isNested()) OS << "nested ";
+    DumpDeclRef(i->getVariable());
+    if (i->hasCopyExpr()) DumpSubTree(i->getCopyExpr());
+    OS << ")";
+  }
+  IndentLevel--;
+
+  DumpSubTree(block->getBody());
+}
+
 // GNU extensions.
 
 void StmtDumper::VisitAddrLabelExpr(AddrLabelExpr *Node) {