r209546 - Don't suppress warning about dllimport on typedefs etc. in MicrosoftExt mode
Hans Wennborg
hans at hanshq.net
Fri May 23 13:16:41 PDT 2014
Author: hans
Date: Fri May 23 15:16:41 2014
New Revision: 209546
URL: http://llvm.org/viewvc/llvm-project?rev=209546&view=rev
Log:
Don't suppress warning about dllimport on typedefs etc. in MicrosoftExt mode
It's true the MSVC doesn't warn about dllimport when applied to e.g. a typedef,
but that applies to dllexport too. I'd like us to be consistent, and I think
the right thing to do is to warn.
The original test that came with implementing the old behaviour doesn't provide
a good motivation, and it said it was checking that we're not repoting an *error*,
which is still true since this is just a warning.
There are plenty of tests e.g. in Sema/dllimport.c to check that we do warn
about dllimport on non functions or variables.
Differential Revision: http://reviews.llvm.org/D3832
Removed:
cfe/trunk/test/Rewriter/dllimport-typedef.c
Modified:
cfe/trunk/include/clang/Basic/Attr.td
cfe/trunk/lib/Sema/SemaDeclAttr.cpp
Modified: cfe/trunk/include/clang/Basic/Attr.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/Attr.td?rev=209546&r1=209545&r2=209546&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/Attr.td (original)
+++ cfe/trunk/include/clang/Basic/Attr.td Fri May 23 15:16:41 2014
@@ -1665,8 +1665,7 @@ def DLLExport : InheritableAttr, TargetS
def DLLImport : InheritableAttr, TargetSpecificAttr<TargetWindows> {
let Spellings = [Declspec<"dllimport">, GCC<"dllimport">];
- // Technically, the subjects for DllImport are Function and Var, but there is
- // custom semantic handling required when MicrosoftExt is true.
+ let Subjects = SubjectList<[Function, Var]>;
let Documentation = [Undocumented];
}
Modified: cfe/trunk/lib/Sema/SemaDeclAttr.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclAttr.cpp?rev=209546&r1=209545&r2=209546&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDeclAttr.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDeclAttr.cpp Fri May 23 15:16:41 2014
@@ -3836,18 +3836,6 @@ DLLImportAttr *Sema::mergeDLLImportAttr(
}
static void handleDLLImportAttr(Sema &S, Decl *D, const AttributeList &Attr) {
- // Attribute can be applied only to functions or variables.
- FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
- if (!FD && !isa<VarDecl>(D)) {
- // Apparently Visual C++ thinks it is okay to not emit a warning
- // in this case, so only emit a warning when -fms-extensions is not
- // specified.
- if (!S.getLangOpts().MicrosoftExt)
- S.Diag(Attr.getLoc(), diag::warn_attribute_wrong_decl_type)
- << Attr.getName() << ExpectedVariableOrFunction;
- return;
- }
-
unsigned Index = Attr.getAttributeSpellingListIndex();
DLLImportAttr *NewAttr = S.mergeDLLImportAttr(D, Attr.getRange(), Index);
if (NewAttr)
Removed: cfe/trunk/test/Rewriter/dllimport-typedef.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Rewriter/dllimport-typedef.c?rev=209545&view=auto
==============================================================================
--- cfe/trunk/test/Rewriter/dllimport-typedef.c (original)
+++ cfe/trunk/test/Rewriter/dllimport-typedef.c (removed)
@@ -1,17 +0,0 @@
-// RUN: not %clang_cc1 -triple i686-pc-win32 -fms-extensions -fsyntax-only %s 2>&1 | FileCheck -check-prefix=CHECK-NEG %s
-// RUN: not %clang_cc1 -triple i686-pc-win32 -fsyntax-only %s 2>&1 | FileCheck -check-prefix=CHECK-POS %s
-
-// Do not report an error with including dllimport in the typedef when -fms-extensions is specified.
-// Addresses <rdar://problem/7653870>.
-typedef __declspec(dllimport) int CB(void);
-
-// This function is added just to trigger a diagnostic. This way we can test how many
-// diagnostics we expect.
-void bar() { return 1; }
-
-// CHECK-NEG: error: void function 'bar' should not return a value
-// CHECK-NEG: {{^}}1 error generated
-// CHECK-POS: warning: 'dllimport' attribute only applies to variables and functions
-// CHECK-POS: error: void function 'bar' should not return a value
-// CHECK-POS: 1 warning and 1 error generated
-
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