diff options
| author | amacleod <amacleod@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-11-07 20:06:39 +0000 |
|---|---|---|
| committer | amacleod <amacleod@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-11-07 20:06:39 +0000 |
| commit | 8808bf16125e1bea5cd2e969d19a53b9618593f1 (patch) | |
| tree | deab25b73551eb04852240c97020eb3e7a1060c6 /gcc/builtins.c | |
| parent | 6df74ab4271c036e5c80aa5b67104c98c0dda1d5 (diff) | |
| download | gcc-8808bf16125e1bea5cd2e969d19a53b9618593f1.tar.gz | |
2011-11-07 Andrew MacLeod <amacleod@redhat.com>
libstdc++-v3
* include/bits/atomic_base.h (atomic_thread_fence): Call builtin.
(atomic_signal_fence): Call builtin.
(atomic_flag::test_and_set): Call __atomic_exchange when it is lockfree,
otherwise fall back to call __sync_lock_test_and_set.
(atomic_flag::clear): Call __atomic_store when it is lockfree,
otherwise fall back to call __sync_lock_release.
gcc
* doc/extend.texi: Docuemnt behaviour change for __atomic_exchange and
__atomic_store.
* optabs.c (expand_atomic_exchange): Expand to __sync_lock_test_and_set
only when originated from that builtin.
(expand_atomic_store): Expand to __sync_lock_release when originated
from that builtin.
* builtins.c (expand_builtin_sync_lock_test_and_set): Add flag that
expand_atomic_exchange call originated from here.
(expand_builtin_sync_lock_release): Add flag that expand_atomic_store
call originated from here.
(expand_builtin_atomic_exchange): Add origination flag.
(expand_builtin_atomic_store): Add origination flag.
* expr.h (expand_atomic_exchange, expand_atomic_store): Add boolean
parameters to indicate implementation fall back options.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@181111 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index dc9fe78599c..205d586fc33 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -5221,7 +5221,7 @@ expand_builtin_sync_lock_test_and_set (enum machine_mode mode, tree exp, mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); - return expand_atomic_exchange (target, mem, val, MEMMODEL_ACQUIRE); + return expand_atomic_exchange (target, mem, val, MEMMODEL_ACQUIRE, true); } /* Expand the __sync_lock_release intrinsic. EXP is the CALL_EXPR. */ @@ -5234,7 +5234,7 @@ expand_builtin_sync_lock_release (enum machine_mode mode, tree exp) /* Expand the operands. */ mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); - expand_atomic_store (mem, const0_rtx, MEMMODEL_RELEASE); + expand_atomic_store (mem, const0_rtx, MEMMODEL_RELEASE, true); } /* Given an integer representing an ``enum memmodel'', verify its @@ -5285,7 +5285,7 @@ expand_builtin_atomic_exchange (enum machine_mode mode, tree exp, rtx target) mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); - return expand_atomic_exchange (target, mem, val, model); + return expand_atomic_exchange (target, mem, val, model, false); } /* Expand the __atomic_compare_exchange intrinsic: @@ -5402,7 +5402,7 @@ expand_builtin_atomic_store (enum machine_mode mode, tree exp) mem = get_builtin_sync_mem (CALL_EXPR_ARG (exp, 0), mode); val = expand_expr_force_mode (CALL_EXPR_ARG (exp, 1), mode); - return expand_atomic_store (mem, val, model); + return expand_atomic_store (mem, val, model, false); } /* Expand the __atomic_fetch_XXX intrinsic: |