r324425 - [Sema][ObjC] Use SmallSetVector to fix a failing test on the reverse

[Akira Hatanaka via cfe-commits]

Author: ahatanak
Date: Tue Feb  6 15:44:40 2018
New Revision: 324425

URL: http://llvm.org/viewvc/llvm-project?rev=324425&view=rev
Log:
[Sema][ObjC] Use SmallSetVector to fix a failing test on the reverse
iteration bot.

This commit reverts r315639, which was causing clang to print
diagnostics that weren't printed before. Instead, it declares
OverrideSearch::Overridden as a SmallSetVector to fix the
non-deterministic behavior r315639 was trying to fix.

rdar://problem/36445528

Modified:
    cfe/trunk/lib/Sema/SemaDecl.cpp
    cfe/trunk/lib/Sema/SemaDeclObjC.cpp
    cfe/trunk/test/SemaObjC/arc-decls.m

Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=324425&r1=324424&r2=324425&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Tue Feb  6 15:44:40 2018
@@ -3623,6 +3623,8 @@ void Sema::mergeObjCMethodDecls(ObjCMeth
          ni = newMethod->param_begin(), ne = newMethod->param_end();
        ni != ne && oi != oe; ++ni, ++oi)
     mergeParamDeclAttributes(*ni, *oi, *this);
+
+  CheckObjCMethodOverride(newMethod, oldMethod);
 }
 
 static void diagnoseVarDeclTypeMismatch(Sema &S, VarDecl *New, VarDecl* Old) {

Modified: cfe/trunk/lib/Sema/SemaDeclObjC.cpp
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclObjC.cpp?rev=324425&r1=324424&r2=324425&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDeclObjC.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDeclObjC.cpp Tue Feb  6 15:44:40 2018
@@ -4133,7 +4133,7 @@ class OverrideSearch {
 public:
   Sema &S;
   ObjCMethodDecl *Method;
-  llvm::SmallPtrSet<ObjCMethodDecl*, 4> Overridden;
+  llvm::SmallSetVector<ObjCMethodDecl*, 4> Overridden;
   bool Recursive;
 
 public:
@@ -4170,7 +4170,7 @@ public:
     }
   }
 
-  typedef llvm::SmallPtrSetImpl<ObjCMethodDecl*>::iterator iterator;
+  typedef decltype(Overridden)::iterator iterator;
   iterator begin() const { return Overridden.begin(); }
   iterator end() const { return Overridden.end(); }
 
@@ -4338,10 +4338,6 @@ void Sema::CheckObjCMethodOverrides(ObjC
 
     // Then merge the declarations.
     mergeObjCMethodDecls(ObjCMethod, overridden);
-  }
-
-  for (ObjCMethodDecl *overridden : overrides) {
-    CheckObjCMethodOverride(ObjCMethod, overridden);
 
     if (ObjCMethod->isImplicit() && overridden->isImplicit())
       continue; // Conflicting properties are detected elsewhere.

Modified: cfe/trunk/test/SemaObjC/arc-decls.m
URL: 
http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaObjC/arc-decls.m?rev=324425&r1=324424&r2=324425&view=diff
==============================================================================
--- cfe/trunk/test/SemaObjC/arc-decls.m (original)
+++ cfe/trunk/test/SemaObjC/arc-decls.m Tue Feb  6 15:44:40 2018
@@ -154,3 +154,25 @@ struct __attribute__((objc_ownership(non
 
 @property (readwrite, weak) ControllerClass *weak_controller;
 @end
+
+@interface I3
+@end
+
+@interface D3 : I3
+@end
+
+@interface D3 (Cat1)
+- (id)method;
+@end
+
+@interface I3 (Cat2)
+// FIXME: clang should diagnose mismatch between methods in D3(Cat1) and
+//        I3(Cat2).
+- (id)method __attribute__((ns_returns_retained));
+@end
+
+@implementation D3
+- (id)method {
+  return (id)0;
+}
+@end


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