diff options
| author | ramana <ramana@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-06-04 09:19:51 +0000 |
|---|---|---|
| committer | ramana <ramana@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-06-04 09:19:51 +0000 |
| commit | 0925e39e497b5f218c4979b49afbdabcd3828e88 (patch) | |
| tree | b1f66152fa773d5b7dac557924b8c752070f198e /gcc/config/ia64 | |
| parent | 993a73303db1c33cf6a946a83f532369a74fea85 (diff) | |
| download | gcc-0925e39e497b5f218c4979b49afbdabcd3828e88.tar.gz | |
Remove TARGET_RELAXED_ORDERING and optimize for weak memory models.
This patch removes the special casing for targets with relaxed
memory ordering and handles guard accesses with equivalent
atomic load acquire operations. In this process we change the
algorithm to load the guard variable with an atomic load that
has ACQUIRE semantics.
This then means that on targets which have weak memory models, the
fast path is inlined and can directly use a load-acquire instruction
where available (and yay! one more hook gone).
2015-06-04 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
PR c++/66192
PR target/66200
* doc/tm.texi: Regenerate.
* doc/tm.texi.in (TARGET_RELAXED_ORDERING): Delete.
* target.def (TARGET_RELAXED_ORDERING): Likewise.
* config/alpha/alpha.c (TARGET_RELAXED_ORDERING): Likewise.
* config/ia64/ia64.c (TARGET_RELAXED_ORDERING): Likewise.
* config/rs6000/rs6000.c (TARGET_RELAXED_ORDERING): Likewise.
* config/sparc/linux.h (SPARC_RELAXED_ORDERING): Likewise.
* config/sparc/linux64.h (SPARC_RELAXED_ORDERING): Likewise.
* config/sparc/sparc.c (TARGET_RELAXED_ORDERING): Likewise.
* config/sparc/sparc.h (SPARC_RELAXED_ORDERING): Likewise.
* system.h (TARGET_RELAXED_ORDERING): Poison.
2015-06-04 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
PR c++/66192
PR target/66200
* cp-tree.h (get_guard_cond): Adjust declaration
* decl.c (expand_static_init): Use atomic load acquire
and adjust call to get_guard_cond.
* decl2.c (build_atomic_load_byte): New function.
(get_guard_cond): Handle thread_safety.
(one_static_initialization_or_destruction): Adjust call to
get_guard_cond.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@224118 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config/ia64')
| -rw-r--r-- | gcc/config/ia64/ia64.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/gcc/config/ia64/ia64.c b/gcc/config/ia64/ia64.c index c1e2ecdf0d8..45ad97a10a4 100644 --- a/gcc/config/ia64/ia64.c +++ b/gcc/config/ia64/ia64.c @@ -630,11 +630,6 @@ static const struct attribute_spec ia64_attribute_table[] = #define TARGET_LIBGCC_FLOATING_MODE_SUPPORTED_P \ ia64_libgcc_floating_mode_supported_p -/* ia64 architecture manual 4.4.7: ... reads, writes, and flushes may occur - in an order different from the specified program order. */ -#undef TARGET_RELAXED_ORDERING -#define TARGET_RELAXED_ORDERING true - #undef TARGET_LEGITIMATE_CONSTANT_P #define TARGET_LEGITIMATE_CONSTANT_P ia64_legitimate_constant_p #undef TARGET_LEGITIMATE_ADDRESS_P |