diff options
| author | H.J. Lu <hongjiu.lu@intel.com> | 2018-07-19 10:47:23 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2018-07-19 03:47:23 -0700 |
| commit | 39a6a24334f95e047dcd7e0b27c2f27f6340bdc6 (patch) | |
| tree | f141ecfb1fd3de14a2fdecf3ec8f06e0d7e8793b /gcc/doc | |
| parent | e0c27d52dd783affbc95bdb53630b35ae044e620 (diff) | |
| download | gcc-39a6a24334f95e047dcd7e0b27c2f27f6340bdc6.zip gcc-39a6a24334f95e047dcd7e0b27c2f27f6340bdc6.tar.gz gcc-39a6a24334f95e047dcd7e0b27c2f27f6340bdc6.tar.bz2 | |
i386: Change indirect_return to function type attribute
In
struct ucontext;
typedef struct ucontext ucontext_t;
extern int (*bar) (ucontext_t *__restrict __oucp,
const ucontext_t *__restrict __ucp)
__attribute__((__indirect_return__));
extern int res;
void
foo (ucontext_t *oucp, ucontext_t *ucp)
{
res = bar (oucp, ucp);
}
bar() may return via indirect branch. This patch changes indirect_return
to type attribute to allow indirect_return attribute on variable or type
of function pointer so that ENDBR can be inserted after call to bar().
gcc/
PR target/86560
* config/i386/i386.c (rest_of_insert_endbranch): Lookup
indirect_return as function type attribute.
(ix86_attribute_table): Change indirect_return to function
type attribute.
* doc/extend.texi: Update indirect_return attribute.
gcc/testsuite/
PR target/86560
* gcc.target/i386/pr86560-1.c: New test.
* gcc.target/i386/pr86560-2.c: Likewise.
* gcc.target/i386/pr86560-3.c: Likewise.
From-SVN: r262877
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/extend.texi | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index abac85c..7b471ec 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -5889,8 +5889,9 @@ foo (void) @item indirect_return @cindex @code{indirect_return} function attribute, x86 -The @code{indirect_return} attribute on a function is used to inform -the compiler that the function may return via indirect branch. +The @code{indirect_return} attribute can be applied to a function, +as well as variable or type of function pointer to inform the +compiler that the function may return via indirect branch. @end table |