[AST][NFC] Pack ArraySubscriptExpr

Use the newly available space in the bit-fields of Stmt.
This saves one pointer per ArraySubscriptExpr.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@347317 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/AST/Expr.h b/include/clang/AST/Expr.h
index 004631019c71437cd246ee12f71e766f3a702507..fbf8bc4cf221baa1f1ac888fd87730fa50715e0f 100644 (file)
--- a/include/clang/AST/Expr.h
+++ b/include/clang/AST/Expr.h
@@ -2315,9 +2315,9 @@ public:
 
 /// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting.
 class ArraySubscriptExpr : public Expr {
-  enum { LHS, RHS, END_EXPR=2 };
-  Stmt* SubExprs[END_EXPR];
-  SourceLocation RBracketLoc;
+  enum { LHS, RHS, END_EXPR };
+  Stmt *SubExprs[END_EXPR];
+
 public:
   ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t,
                      ExprValueKind VK, ExprObjectKind OK,
@@ -2328,10 +2328,10 @@ public:
          (lhs->isInstantiationDependent() ||
           rhs->isInstantiationDependent()),
          (lhs->containsUnexpandedParameterPack() ||
-          rhs->containsUnexpandedParameterPack())),
-    RBracketLoc(rbracketloc) {
+          rhs->containsUnexpandedParameterPack())) {
     SubExprs[LHS] = lhs;
     SubExprs[RHS] = rhs;
+    ArraySubscriptExprBits.RBracketLoc = rbracketloc;
   }
 
   /// Create an empty array subscript expression.
@@ -2374,10 +2374,14 @@ public:
   SourceLocation getBeginLoc() const LLVM_READONLY {
     return getLHS()->getBeginLoc();
   }
-  SourceLocation getEndLoc() const LLVM_READONLY { return RBracketLoc; }
+  SourceLocation getEndLoc() const { return getRBracketLoc(); }
 
-  SourceLocation getRBracketLoc() const { return RBracketLoc; }
-  void setRBracketLoc(SourceLocation L) { RBracketLoc = L; }
+  SourceLocation getRBracketLoc() const {
+    return ArraySubscriptExprBits.RBracketLoc;
+  }
+  void setRBracketLoc(SourceLocation L) {
+    ArraySubscriptExprBits.RBracketLoc = L;
+  }
 
   SourceLocation getExprLoc() const LLVM_READONLY {
     return getBase()->getExprLoc();

diff --git a/include/clang/AST/Stmt.h b/include/clang/AST/Stmt.h
index 4dd7ab79f72f6bbfe221ac8bd729a038dcaab485..4883aa71e0dcfc03fc783776e5c7398127f21579 100644 (file)
--- a/include/clang/AST/Stmt.h
+++ b/include/clang/AST/Stmt.h
@@ -416,6 +416,14 @@ protected:
     unsigned IsType : 1; // true if operand is a type, false if an expression.
   };
 
+  class ArraySubscriptExprBitfields {
+    friend class ArraySubscriptExpr;
+
+    unsigned : NumExprBits;
+
+    SourceLocation RBracketLoc;
+  };
+
   class CallExprBitfields {
     friend class CallExpr;
 
@@ -658,6 +666,7 @@ protected:
     CharacterLiteralBitfields CharacterLiteralBits;
     UnaryOperatorBitfields UnaryOperatorBits;
     UnaryExprOrTypeTraitExprBitfields UnaryExprOrTypeTraitExprBits;
+    ArraySubscriptExprBitfields ArraySubscriptExprBits;
     CallExprBitfields CallExprBits;
     MemberExprBitfields MemberExprBits;
     CastExprBitfields CastExprBits;