diff options
Diffstat (limited to 'gcc/tree-profile.c')
| -rw-r--r-- | gcc/tree-profile.c | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/gcc/tree-profile.c b/gcc/tree-profile.c index d18b954a385..a4f9d11b161 100644 --- a/gcc/tree-profile.c +++ b/gcc/tree-profile.c @@ -592,25 +592,26 @@ tree_profiling (void) struct cgraph_node *node; /* Verify whether we can utilize atomic update operations. */ - if (flag_profile_update == PROFILE_UPDATE_ATOMIC) + bool can_support_atomic = false; + unsigned HOST_WIDE_INT gcov_type_size + = tree_to_uhwi (TYPE_SIZE_UNIT (get_gcov_type ())); + if (gcov_type_size == 4) + can_support_atomic + = HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi; + else if (gcov_type_size == 8) + can_support_atomic + = HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi; + + if (flag_profile_update == PROFILE_UPDATE_ATOMIC + && !can_support_atomic) { - bool can_support = false; - unsigned HOST_WIDE_INT gcov_type_size - = tree_to_uhwi (TYPE_SIZE_UNIT (get_gcov_type ())); - if (gcov_type_size == 4) - can_support - = HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi; - else if (gcov_type_size == 8) - can_support - = HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi; - - if (!can_support) - { - warning (0, "target does not support atomic profile update, " - "single mode is selected"); - flag_profile_update = PROFILE_UPDATE_SINGLE; - } + warning (0, "target does not support atomic profile update, " + "single mode is selected"); + flag_profile_update = PROFILE_UPDATE_SINGLE; } + else if (flag_profile_update == PROFILE_UPDATE_PREFER_ATOMIC) + flag_profile_update = can_support_atomic + ? PROFILE_UPDATE_ATOMIC : PROFILE_UPDATE_SINGLE; /* This is a small-ipa pass that gets called only once, from cgraphunit.c:ipa_passes(). */ |