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| author | Martin Liska <mliska@suse.cz> | 2016-09-06 16:13:21 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2016-09-06 14:13:21 +0000 |
| commit | 7fe76f6ae806fda9a5efe335ccf0e250dd4dde1a (patch) | |
| tree | 315ef19a1505b76db80cb9f8f37a31a21332de73 /libgcc | |
| parent | 209b636eddd6602c55b4a65237578953b7d80225 (diff) | |
| download | gcc-7fe76f6ae806fda9a5efe335ccf0e250dd4dde1a.zip gcc-7fe76f6ae806fda9a5efe335ccf0e250dd4dde1a.tar.gz gcc-7fe76f6ae806fda9a5efe335ccf0e250dd4dde1a.tar.bz2 | |
Detect whether target can use -fprofile-update=atomic
PR gcov-profile/77378
PR gcov-profile/77466
* libgcov-profiler.c: Use __GCC_HAVE_SYNC_COMPARE_AND_SWAP_{4,8} to
conditionaly enable/disable *_atomic functions.
PR gcov-profile/77378
PR gcov-profile/77466
* tree-profile.c (tree_profiling): Detect whether target can use
-fprofile-update=atomic.
PR gcov-profile/77378
PR gcov-profile/77466
* gcc.dg/profile-update-warning.c: New test.
From-SVN: r240008
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 7 | ||||
| -rw-r--r-- | libgcc/libgcov-profiler.c | 23 |
2 files changed, 25 insertions, 5 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index d5ecf77..8ad8ef5 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,3 +1,10 @@ +2016-09-06 Martin Liska <mliska@suse.cz> + + PR gcov-profile/77378 + PR gcov-profile/77466 + * libgcov-profiler.c: Use __GCC_HAVE_SYNC_COMPARE_AND_SWAP_{4,8} to + conditionaly enable/disable *_atomic functions. + 2016-08-26 Joseph Myers <joseph@codesourcery.com> * config.host (i[34567]86-*-* | x86_64-*-*): Enable TFmode soft-fp diff --git a/libgcc/libgcov-profiler.c b/libgcc/libgcov-profiler.c index 70a821d..d9217b9 100644 --- a/libgcc/libgcov-profiler.c +++ b/libgcc/libgcov-profiler.c @@ -26,6 +26,17 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #include "libgcov.h" #if !defined(inhibit_libc) +/* Detect whether target can support atomic update of profilers. */ +#if __SIZEOF_LONG_LONG__ == 4 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 +#define GCOV_SUPPORTS_ATOMIC 1 +#else +#if __SIZEOF_LONG_LONG__ == 8 && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 +#define GCOV_SUPPORTS_ATOMIC 1 +#else +#define GCOV_SUPPORTS_ATOMIC 0 +#endif +#endif + #ifdef L_gcov_interval_profiler /* If VALUE is in interval <START, START + STEPS - 1>, then increases the corresponding counter in COUNTERS. If the VALUE is above or below @@ -46,7 +57,7 @@ __gcov_interval_profiler (gcov_type *counters, gcov_type value, } #endif -#ifdef L_gcov_interval_profiler_atomic +#if defined(L_gcov_interval_profiler_atomic) && GCOV_SUPPORTS_ATOMIC /* If VALUE is in interval <START, START + STEPS - 1>, then increases the corresponding counter in COUNTERS. If the VALUE is above or below the interval, COUNTERS[STEPS] or COUNTERS[STEPS + 1] is increased @@ -80,7 +91,7 @@ __gcov_pow2_profiler (gcov_type *counters, gcov_type value) } #endif -#ifdef L_gcov_pow2_profiler_atomic +#if defined(L_gcov_pow2_profiler_atomic) && GCOV_SUPPORTS_ATOMIC /* If VALUE is a power of two, COUNTERS[1] is incremented. Otherwise COUNTERS[0] is incremented. Function is thread-safe. */ @@ -134,7 +145,7 @@ __gcov_one_value_profiler (gcov_type *counters, gcov_type value) } #endif -#ifdef L_gcov_one_value_profiler_atomic +#if defined(L_gcov_one_value_profiler_atomic) && GCOV_SUPPORTS_ATOMIC /* Update one value profilers (COUNTERS) for a given VALUE. @@ -342,6 +353,7 @@ __gcov_time_profiler (gcov_type* counters) counters[0] = ++function_counter; } +#if GCOV_SUPPORTS_ATOMIC /* Sets corresponding COUNTERS if there is no value. Function is thread-safe. */ @@ -352,6 +364,7 @@ __gcov_time_profiler_atomic (gcov_type* counters) counters[0] = __atomic_add_fetch (&function_counter, 1, MEMMODEL_RELAXED); } #endif +#endif #ifdef L_gcov_average_profiler @@ -366,7 +379,7 @@ __gcov_average_profiler (gcov_type *counters, gcov_type value) } #endif -#ifdef L_gcov_average_profiler_atomic +#if defined(L_gcov_average_profiler_atomic) && GCOV_SUPPORTS_ATOMIC /* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want to saturate up. Function is thread-safe. */ @@ -388,7 +401,7 @@ __gcov_ior_profiler (gcov_type *counters, gcov_type value) } #endif -#ifdef L_gcov_ior_profiler_atomic +#if defined(L_gcov_ior_profiler_atomic) && GCOV_SUPPORTS_ATOMIC /* Bitwise-OR VALUE into COUNTER. Function is thread-safe. */ void |