diff options
| author | Bernd Schmidt <bernds@redhat.com> | 2015-11-27 10:05:36 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2015-11-27 10:05:36 +0000 |
| commit | c000cd7c93aa657aae1cdfd6ce9b950b78c79624 (patch) | |
| tree | 1f99eda41a82e61f545b497246278ba9cd804341 /gcc/tree-ssa-phiopt.c | |
| parent | 4d7b2a8a3b12beac09c5d8f8bcbf43a81296e462 (diff) | |
| download | gcc-c000cd7c93aa657aae1cdfd6ce9b950b78c79624.zip gcc-c000cd7c93aa657aae1cdfd6ce9b950b78c79624.tar.gz gcc-c000cd7c93aa657aae1cdfd6ce9b950b78c79624.tar.bz2 | |
Be more careful about barriers when speculating conditional stores.
* gimple.h (nonbarrier_call_p): Declare.
* gimple.c (nonbarrier_call_p): New function.
* tree-ssa-phiopt.c (nontrapping_dom_walker::before_dom_children):
Also increment call phase for ASMs with vdef and potential barrier
calls.
From-SVN: r231005
Diffstat (limited to 'gcc/tree-ssa-phiopt.c')
| -rw-r--r-- | gcc/tree-ssa-phiopt.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-ssa-phiopt.c b/gcc/tree-ssa-phiopt.c index 02d5aa0..344cd2f 100644 --- a/gcc/tree-ssa-phiopt.c +++ b/gcc/tree-ssa-phiopt.c @@ -1519,7 +1519,9 @@ nontrapping_dom_walker::before_dom_children (basic_block bb) { gimple *stmt = gsi_stmt (gsi); - if (is_gimple_call (stmt) && !nonfreeing_call_p (stmt)) + if ((gimple_code (stmt) == GIMPLE_ASM && gimple_vdef (stmt)) + || (is_gimple_call (stmt) + && (!nonfreeing_call_p (stmt) || !nonbarrier_call_p (stmt)))) nt_call_phase++; else if (gimple_assign_single_p (stmt) && !gimple_has_volatile_ops (stmt)) { |