Implement an indirect-goto optimization for goto *&&lbl and respect this
in the scope checker. With that done, turn an indirect goto into a
protected scope into a hard error; otherwise IR generation has to start
worrying about declarations not dominating their scopes, as exemplified
in PR8473.
If this really affects anyone, I can probably adjust this to only hard-error
on possible indirect gotos into VLA scopes rather than arbitrary scopes.
But we'll see how people cope with the aggressive change on the marginal
feature.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@117539 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Stmt.cpp b/lib/AST/Stmt.cpp
index 4f46b35..09d889e 100644
--- a/lib/AST/Stmt.cpp
+++ b/lib/AST/Stmt.cpp
@@ -669,8 +669,12 @@
Stmt::child_iterator GotoStmt::child_end() { return child_iterator(); }
// IndirectGotoStmt
-Expr* IndirectGotoStmt::getTarget() { return cast<Expr>(Target); }
-const Expr* IndirectGotoStmt::getTarget() const { return cast<Expr>(Target); }
+LabelStmt *IndirectGotoStmt::getConstantTarget() {
+ if (AddrLabelExpr *E =
+ dyn_cast<AddrLabelExpr>(getTarget()->IgnoreParenImpCasts()))
+ return E->getLabel();
+ return 0;
+}
Stmt::child_iterator IndirectGotoStmt::child_begin() { return &Target; }
Stmt::child_iterator IndirectGotoStmt::child_end() { return &Target+1; }