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tree-tailcall.c (find_tail_calls): Don't use tail-call recursion for built-in functions. 

gcc/
2013-10-15  Richard Biener  <rguenther@suse.de>

	* tree-tailcall.c (find_tail_calls): Don't use tail-call recursion
	for built-in functions.

gcc/testsuite/
	* gcc.dg/torture/builtin-self.c: New file.

libgcc/
	* sync.c: Remove static aliases and define each function directly
	under its real name.

From-SVN: r203628
This commit is contained in:
Richard Sandiford 2013-10-15 18:24:30 +00:00
parent b114bfb455
commit 1602204161
6 changed files with 39 additions and 18 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2013-10-15 Richard Biener <rguenther@suse.de>
* tree-tailcall.c (find_tail_calls): Don't use tail-call recursion
for built-in functions.
2013-10-15 Zhenqiang Chen <zhenqiang.chen@arm.com>
* tree-ssa-reassoc.c: Include rtl.h and tm_p.h.

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2013-10-15 Richard Sandiford <rdsandiford@googlemail.com>
* gcc.dg/torture/builtin-self.c: New file.
2013-10-15 Zhenqiang Chen <zhenqiang.chen@arm.com>
* gcc.dg/tree-ssa/reassoc-32.c: New test case.

10
gcc/testsuite/gcc.dg/torture/builtin-self.c Normal file
View File

@ -0,0 +1,10 @@
/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
/* Check that we can use this idiom to define out-of-line copies of built-in
functions. This is used by libgcc/sync.c, for example. */
void __sync_synchronize (void)
{
__sync_synchronize ();
}
/* { dg-final { scan-assembler "__sync_synchronize" } } */
/* { dg-final { scan-assembler "\t(lock|mfence)" } } */
/* { dg-final { scan-assembler-not "\tcall" } } */

4
gcc/tree-tailcall.c
View File

@ -446,7 +446,9 @@ find_tail_calls (basic_block bb, struct tailcall **ret)
/* We found the call, check whether it is suitable. */
tail_recursion = false;
func = gimple_call_fndecl (call);
if (func && recursive_call_p (current_function_decl, func))
if (func
&& !DECL_BUILT_IN (func)
&& recursive_call_p (current_function_decl, func))
{
tree arg;

5
libgcc/ChangeLog
View File

@ -1,3 +1,8 @@
2013-10-15 Richard Sandiford <rdsandiford@googlemail.com>
* sync.c: Remove static aliases and define each function directly
under its real name.
2013-10-02 John David Anglin <danglin@gcc.gnu.org>
* config.host (hppa*64*-*-linux*): Define extra_parts.

29
libgcc/sync.c
View File

@ -67,27 +67,26 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#if defined FN
/* Define macros for each __sync_* function type. Each macro defines a
local function called <NAME>_<UNITS> that acts like __<NAME>_<UNITS>.
TYPE is a type that has UNITS bytes. */
/* Define functions called __sync_<NAME>_<UNITS>, with one macro per
signature. TYPE is a type that has UNITS bytes. */
#define DEFINE_V_PV(NAME, UNITS, TYPE) \
static TYPE \
NAME##_##UNITS (TYPE *ptr, TYPE value) \
TYPE \
__##NAME##_##UNITS (TYPE *ptr, TYPE value) \
{ \
return __##NAME (ptr, value); \
}
#define DEFINE_V_PVV(NAME, UNITS, TYPE) \
static TYPE \
NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2) \
#define DEFINE_V_PVV(NAME, UNITS, TYPE) \
TYPE \
__##NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2) \
{ \
return __##NAME (ptr, value1, value2); \
}
#define DEFINE_BOOL_PVV(NAME, UNITS, TYPE) \
static _Bool \
NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2) \
_Bool \
__##NAME##_##UNITS (TYPE *ptr, TYPE value1, TYPE value2) \
{ \
return __##NAME (ptr, value1, value2); \
}
@ -118,9 +117,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#define DEFINE1(NAME, UNITS, TYPE) \
static int unused[sizeof (TYPE) == UNITS ? 1 : -1] \
__attribute__((unused)); \
local_##NAME (NAME, UNITS, TYPE); \
typeof (NAME##_##UNITS) __##NAME##_##UNITS \
__attribute__((alias (#NAME "_" #UNITS)));
local_##NAME (NAME, UNITS, TYPE);
/* As above, but performing macro expansion on the arguments. */
#define DEFINE(NAME, UNITS, TYPE) DEFINE1 (NAME, UNITS, TYPE)
@ -167,13 +164,11 @@ DEFINE (FN, 8, UOItype)
#if defined Lsync_synchronize
static void
sync_synchronize (void)
void
__sync_synchronize (void)
{
__sync_synchronize ();
}
typeof (sync_synchronize) __sync_synchronize \
__attribute__((alias ("sync_synchronize")));
#endif