commit 3c989027f68e2d9dfd57c018ccc550bd9fb79920
author Chris Lattner <sabre@nondot.org> Mon Mar 22 21:08:50 2010 +0000
committer Chris Lattner <sabre@nondot.org> Mon Mar 22 21:08:50 2010 +0000
tree 60724824505b72e3177d80898c8800b48e6bd300
parent a87d477c69ec31a0d24b7c53e4a781fb76617809

(re)implement PR6542, accepting and discarding the __gcc_tdiag__
format attribute specifier.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99213 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaDeclAttr.cpp

diff --git a/lib/Sema/SemaDeclAttr.cpp b/lib/Sema/SemaDeclAttr.cpp
index 73a34f8..5a7a3c3 100644
--- a/lib/Sema/SemaDeclAttr.cpp
+++ b/lib/Sema/SemaDeclAttr.cpp
@@ -1115,6 +1115,7 @@
   NSStringFormat,
   StrftimeFormat,
   SupportedFormat,
+  IgnoredFormat,
   InvalidFormat
 };
 
@@ -1136,6 +1137,9 @@
       Format == "zcmn_err")
     return SupportedFormat;
 
+  if (Format == "gcc_tdiag")
+    return IgnoredFormat;
+  
   return InvalidFormat;
 }
 
@@ -1171,6 +1175,10 @@
 
   // Check for supported formats.
   FormatAttrKind Kind = getFormatAttrKind(Format);
+  
+  if (Kind == IgnoredFormat)
+    return;
+  
   if (Kind == InvalidFormat) {
     S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported)
       << "format" << Attr.getParameterName()->getName();

test/Sema/attr-format.c

diff --git a/test/Sema/attr-format.c b/test/Sema/attr-format.c
index 594e590..34102c6 100644
--- a/test/Sema/attr-format.c
+++ b/test/Sema/attr-format.c
@@ -68,3 +68,7 @@
 foo2(const char *fmt, va_list va) {
   xx_vprintf(foo(fmt), va);
 }
+
+// PR6542
+extern void gcc_format (const char *, ...)
+  __attribute__ ((__format__(__gcc_tdiag__, 1, 2)));