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| author | Martin Liska <mliska@suse.cz> | 2016-11-14 13:09:48 +0100 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2016-11-14 12:09:48 +0000 |
| commit | 4d2098539a53d9e2dddd6233fb68820715d95862 (patch) | |
| tree | ddc0a002eeabbf51f86b3f439e6a98477e64cc67 /gcc/tree-profile.c | |
| parent | f6b9a2a0c58a6f8b29f801fd1631c7eee5138c3a (diff) | |
| download | gcc-4d2098539a53d9e2dddd6233fb68820715d95862.zip gcc-4d2098539a53d9e2dddd6233fb68820715d95862.tar.gz gcc-4d2098539a53d9e2dddd6233fb68820715d95862.tar.bz2 | |
Introduce -fprofile-update=prefer-atomic
PR bootstrap/78069
* common.opt: Add prefer-atomic as a new enum value for
-fprofile-update.
* coretypes.h: Likewise.
* doc/invoke.texi: Document the new option value.
* gcc.c: Replace atomic with prefer-atomic. Remove warning.
* tree-profile.c (tree_profiling): Select default value
of -fprofile-update when 'prefer-atomic' is selected.
PR bootstrap/78069
* gcc.dg/no_profile_instrument_function-attr-1.c: Update test
to match scanned pattern.
* gcc.dg/tree-ssa/ssa-lim-11.c: Likewise.
From-SVN: r242386
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 d18b954..a4f9d11 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(). */ |