r325610 - Correct multiversion unsupported target behavior, add a test.

[Erich Keane via cfe-commits]

Author: erichkeane
Date: Tue Feb 20 10:44:50 2018
New Revision: 325610

URL: http://llvm.org/viewvc/llvm-project?rev=325610&view=rev
Log:
Correct multiversion unsupported target behavior, add a test.

Multiversioning SEMA failed to set the declaration as invalid on unsupported
targets.  This patch does that.

Additionally, I noticed that there is no test to validate this error message.
This patch adds one, and uses 'mips' as the test architecture.  

Added:
    cfe/trunk/test/Sema/attr-target-unsupported.c
Modified:
    cfe/trunk/lib/Sema/SemaDecl.cpp

Modified: cfe/trunk/lib/Sema/SemaDecl.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=325610&r1=325609&r2=325610&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Tue Feb 20 10:44:50 2018
@@ -9365,6 +9365,7 @@ static bool CheckMultiVersionFunction(Se
       }
       if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) {
         S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported);
+        NewFD->setInvalidDecl();
         return true;
       }
 
@@ -9407,6 +9408,7 @@ static bool CheckMultiVersionFunction(Se
     if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) {
       S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported);
       S.Diag(OldFD->getLocation(), diag::note_previous_declaration);
+      NewFD->setInvalidDecl();
       return true;
     }
 

Added: cfe/trunk/test/Sema/attr-target-unsupported.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/attr-target-unsupported.c?rev=325610&view=auto
==============================================================================
--- cfe/trunk/test/Sema/attr-target-unsupported.c (added)
+++ cfe/trunk/test/Sema/attr-target-unsupported.c Tue Feb 20 10:44:50 2018
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -triple mips-linux-gnu  -fsyntax-only -verify %s
+
+void __attribute__((target("arch=mips1")))
+foo(void) {}
+// expected-error at +3 {{function multiversioning is not supported on the current target}}
+// expected-note at -2 {{previous declaration is here}}
+void __attribute__((target("arch=mips2")))
+foo(void) {}
+
+// expected-error at +2 {{function multiversioning is not supported on the current target}}
+void __attribute__((target("default")))
+bar(void){}