Add tests for `&enable_if_function` diagnostics.

The introduction of pass_object_size fixed a few bugs related to taking
the address of a function with enable_if attributes. This patch adds
tests for the cases that were fixed.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@254646 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 25 insertions, 1 deletions

diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index 645dbed21b..41aba09f3e 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -8833,7 +8833,6 @@ static bool checkAddressOfFunctionIsAvailable(Sema &S, const FunctionDecl *FD,
                                               SourceLocation Loc) {
   if (!isFunctionAlwaysEnabled(S.Context, FD)) {
     if (Complain) {
-      // FIXME(gbiv): Both diagnostics below lack tests. We should add tests.
       if (InOverloadResolution)
         S.Diag(FD->getLocStart(),
                diag::note_addrof_ovl_candidate_disabled_by_enable_if_attr);
diff --git a/test/Sema/enable_if.c b/test/Sema/enable_if.c
index 0ee642e2ee..0cd9c48f42 100644
--- a/test/Sema/enable_if.c
+++ b/test/Sema/enable_if.c
@@ -136,4 +136,10 @@ void test7() {
   void *p3 = (void*)&f3; // expected-error{{address of overloaded function 'f3' does not match required type 'void'}} expected-note@131{{candidate function made ineligible by enable_if}} expected-note@132{{candidate function made ineligible by enable_if}}
   void *p4 = (void*)f3; // expected-error{{address of overloaded function 'f3' does not match required type 'void'}} expected-note@131{{candidate function made ineligible by enable_if}} expected-note@132{{candidate function made ineligible by enable_if}}
 }
+
+void f4(int m) __attribute__((enable_if(0, "")));
+void test8() {
+  void (*p1)(int) = &f4; // expected-error{{cannot take address of function 'f4' becuase it has one or more non-tautological enable_if conditions}}
+  void (*p2)(int) = f4; // expected-error{{cannot take address of function 'f4' becuase it has one or more non-tautological enable_if conditions}}
+}
 #endif
diff --git a/test/SemaCXX/enable_if.cpp b/test/SemaCXX/enable_if.cpp
index b32bcd01f4..cd8241808c 100644
--- a/test/SemaCXX/enable_if.cpp
+++ b/test/SemaCXX/enable_if.cpp
@@ -233,4 +233,23 @@ namespace FnPtrs {
     a = templatedConflict<int>; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@226{{candidate function}} expected-note@228{{candidate function}}
     a = &templatedConflict<int>; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@226{{candidate function}} expected-note@228{{candidate function}}
   }
+
+  int ovlNoCandidate(int m) __attribute__((enable_if(false, "")));
+  int ovlNoCandidate(int m) __attribute__((enable_if(0, "")));
+  void test7() {
+    int (*p)(int) = ovlNoCandidate; // expected-error{{address of overloaded function 'ovlNoCandidate' does not match required type}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
+    int (*p2)(int) = &ovlNoCandidate; // expected-error{{address of overloaded function 'ovlNoCandidate' does not match required type}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
+    int (*a)(int);
+    a = ovlNoCandidate; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
+    a = &ovlNoCandidate; // expected-error{{assigning to 'int (*)(int)' from incompatible type '<overloaded function type>'}} expected-note@237{{made ineligible by enable_if}} expected-note@238{{made ineligible by enable_if}}
+  }
+
+  int noOvlNoCandidate(int m) __attribute__((enable_if(false, "")));
+  void test8() {
+    int (*p)(int) = noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
+    int (*p2)(int) = &noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
+    int (*a)(int);
+    a = noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
+    a = &noOvlNoCandidate; // expected-error{{cannot take address of function 'noOvlNoCandidate' becuase it has one or more non-tautological enable_if conditions}}
+  }
 }