Merging r167766: into the 3.2 release branch.

Fix more try scoping bugs introduced by r167650.

Introduces more clear scoping flags & flag combinations which should hopefully
be more understandable.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/branches/release_32@169451 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 38 insertions, 11 deletions

diff --git a/include/clang/Sema/Scope.h b/include/clang/Sema/Scope.h
index fa508cfc22..1329f97c2b 100644
--- a/include/clang/Sema/Scope.h
+++ b/include/clang/Sema/Scope.h
@@ -84,11 +84,18 @@ public:
     /// TryScope - This is the scope of a C++ try statement.
     TryScope = 0x1000,
 
+    /// CatchScope - This is the scope of a C++ catch statement.
+    CatchScope = 0x2000,
+
+    /// FnTryCatchScope - This is the scope for a function-level C++ try or
+    /// catch scope.
+    FnTryCatchScope = 0x4000,
+
     /// FnTryScope - This is the scope of a function-level C++ try scope.
-    FnTryScope = 0x3000,
+    FnTryScope = TryScope | FnTryCatchScope,
 
     /// FnCatchScope - This is the scope of a function-level C++ catch scope.
-    FnCatchScope = 0x4000
+    FnCatchScope = CatchScope | FnTryCatchScope
   };
 private:
   /// The parent scope for this scope.  This is null for the translation-unit
diff --git a/lib/Parse/ParseStmt.cpp b/lib/Parse/ParseStmt.cpp
index f604e038d2..5883115850 100644
--- a/lib/Parse/ParseStmt.cpp
+++ b/lib/Parse/ParseStmt.cpp
@@ -2197,7 +2197,7 @@ StmtResult Parser::ParseCXXCatchBlock(bool FnCatch) {
   // The name in a catch exception-declaration is local to the handler and
   // shall not be redeclared in the outermost block of the handler.
   ParseScope CatchScope(this, Scope::DeclScope | Scope::ControlScope |
-                          (FnCatch ? Scope::FnCatchScope : 0));
+                          (FnCatch ? Scope::FnCatchScope : Scope::CatchScope));
 
   // exception-declaration is equivalent to '...' or a parameter-declaration
   // without default arguments.
diff --git a/lib/Sema/IdentifierResolver.cpp b/lib/Sema/IdentifierResolver.cpp
index 00939151c6..7d5530442f 100644
--- a/lib/Sema/IdentifierResolver.cpp
+++ b/lib/Sema/IdentifierResolver.cpp
@@ -135,16 +135,13 @@ bool IdentifierResolver::isDeclInScope(Decl *D, DeclContext *Ctx,
       // of the controlled statement.
       //
       assert(S->getParent() && "No TUScope?");
-      if (S->getFlags() & Scope::FnTryScope)
-        return S->getParent()->isDeclScope(D);
       if (S->getParent()->getFlags() & Scope::ControlScope) {
-        if (S->getParent()->getFlags() & Scope::FnCatchScope) {
-          S = S->getParent();
-          if (S->isDeclScope(D))
-            return true;
-        }
-        return S->getParent()->isDeclScope(D);
+        S = S->getParent();
+        if (S->isDeclScope(D))
+          return true;
       }
+      if (S->getFlags() & Scope::FnTryCatchScope)
+        return S->getParent()->isDeclScope(D);
     }
     return false;
   }
diff --git a/test/CXX/basic/basic.scope/basic.scope.local/p2.cpp b/test/CXX/basic/basic.scope/basic.scope.local/p2.cpp
index 91e96b6b26..7c7b84d678 100644
--- a/test/CXX/basic/basic.scope/basic.scope.local/p2.cpp
+++ b/test/CXX/basic/basic.scope/basic.scope.local/p2.cpp
@@ -35,3 +35,26 @@ void func7() {
     int i; // expected-error{{redefinition of 'i'}}
   }
 }
+
+void func8() {
+  int i;
+  try {
+    int i;
+  } catch (...) {
+  }
+}
+
+void func9() {
+  if (bool b = true)
+    try {
+      int b; // FIXME: this probably should be invalid, maybe
+    } catch (...) {
+    }
+}
+
+void func10() {
+  if (bool b = true)
+    if (true) {
+      int b; // FIXME: decide whether this is valid
+    }
+}