Minor CFG optimization: don't create separate block-level expressions for DeclStmt initializers when the initializer is a literal.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@47771 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/CFG.cpp b/AST/CFG.cpp
index ed9b320..0cab1f1 100644
--- a/AST/CFG.cpp
+++ b/AST/CFG.cpp
@@ -402,8 +402,21 @@
Stmt* S = *I;
++I;
WalkAST_VisitDeclSubExprs(I);
+
+ // Optimization: Don't create separate block-level statements for literals.
- Block = addStmt(S);
+ switch (S->getStmtClass()) {
+ case Stmt::IntegerLiteralClass:
+ case Stmt::CharacterLiteralClass:
+ case Stmt::StringLiteralClass:
+ break;
+
+ // All other cases.
+
+ default:
+ Block = addStmt(S);
+ }
+
return Block;
}