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| author | Maxim Kuvyrkov <maxim@codesourcery.com> | 2012-06-20 01:05:25 +0000 |
|---|---|---|
| committer | Maxim Kuvyrkov <mkuvyrkov@gcc.gnu.org> | 2012-06-20 01:05:25 +0000 |
| commit | 8930883ee93cb4701259e8738f51530d609812f7 (patch) | |
| tree | 417412c5d20847fc0d23a560bad46ac7075e732f /gcc/emit-rtl.c | |
| parent | ff6191481c577c62e481a2f4df3de182d8b63110 (diff) | |
| download | gcc-8930883ee93cb4701259e8738f51530d609812f7.tar.gz | |
emit-rtl.c (need_atomic_barrier_p): New function.
* emit-rtl.c (need_atomic_barrier_p): New function.
* emit-rtl.h (need_atomic_barrier_p): Declare it.
* config/alpha/alpha.c (alpha_{pre,post}_atomic_barrier): Use it.
* config/arm/arm.c (arm_{pre,post}_atomic_barrier): Use it.
* config/tilegx/tilegx.c (tile_{pre,post}_atomic_barrier): Use it.
* config/mips/mips.c (mips_{pre,post}_atomic_barrier_p): Remove.
(mips_process_sync_loop): Use generic version instead.
From-SVN: r188806
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index c82bd61c7e1..9565c618b81 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -6161,4 +6161,29 @@ locator_eq (int loc1, int loc2) return locator_scope (loc1) == locator_scope (loc2); } + +/* Return true if memory model MODEL requires a pre-operation (release-style) + barrier or a post-operation (acquire-style) barrier. While not universal, + this function matches behavior of several targets. */ + +bool +need_atomic_barrier_p (enum memmodel model, bool pre) +{ + switch (model) + { + case MEMMODEL_RELAXED: + case MEMMODEL_CONSUME: + return false; + case MEMMODEL_RELEASE: + return pre; + case MEMMODEL_ACQUIRE: + return !pre; + case MEMMODEL_ACQ_REL: + case MEMMODEL_SEQ_CST: + return true; + default: + gcc_unreachable (); + } +} + #include "gt-emit-rtl.h" |