Add support for the force_align_arg_pointer attribute. This is an x86-specific

attribute, so it uses Anton's new target-specific attribute support. It's
supposed to ensure that the stack is 16-byte aligned, but since necessary
support is lacking from LLVM, this is a no-op for now.

llvm-svn: 95820

1 files changed, 18 insertions, 0 deletions

diff --git a/clang/test/Sema/x86-attr-force-align-arg-pointer.c b/clang/test/Sema/x86-attr-force-align-arg-pointer.c
new file mode 100644
index 00000000000..1470544a697
--- /dev/null
+++ b/clang/test/Sema/x86-attr-force-align-arg-pointer.c
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -triple i386-apple-darwin10 -fsyntax-only -verify %s
+
+int a __attribute__((force_align_arg_pointer)); // expected-warning{{attribute only applies to function types}}
+
+// It doesn't matter where the attribute is located.
+void b(void) __attribute__((force_align_arg_pointer));
+void __attribute__((force_align_arg_pointer)) c(void);
+
+// Functions only have to be declared force_align_arg_pointer once.
+void b(void) {}
+
+// It doesn't matter which declaration has the attribute.
+void d(void);
+void __attribute__((force_align_arg_pointer)) d(void) {}
+
+// Attribute is ignored on function pointer types.
+void (__attribute__((force_align_arg_pointer)) *p)();
+