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omp-expand.c (oxpand_omp_atomic_fetch_op, [...]): Return false if can_atomic_load_p is false.

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* omp-expand.c (oxpand_omp_atomic_fetch_op,
	expand_omp_atomic_pipeline): Return false if can_atomic_load_p is
	false.

From-SVN: r245216
This commit is contained in:
Jakub Jelinek 2017-02-06 20:25:02 +01:00 committed by Jakub Jelinek
parent 176274c9bf
commit dc06356ab8
2 changed files with 9 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-02-06 Jakub Jelinek <jakub@redhat.com>
* omp-expand.c (oxpand_omp_atomic_fetch_op,
expand_omp_atomic_pipeline): Return false if can_atomic_load_p is
false.
2017-02-06 Segher Boessenkool <segher@kernel.crashing.org>
PR rtl-optimization/68664

5
gcc/omp-expand.c
View File

@ -6241,7 +6241,7 @@ expand_omp_atomic_fetch_op (basic_block load_bb,
matter is that (with the exception of i486 vs i586 and xadd) all targets
that support any atomic operaton optab also implements compare-and-swap.
Let optabs.c take care of expanding any compare-and-swap loop. */
if (!can_compare_and_swap_p (imode, true))
if (!can_compare_and_swap_p (imode, true) || !can_atomic_load_p (imode))
return false;
gsi = gsi_last_bb (load_bb);
@ -6318,7 +6318,8 @@ expand_omp_atomic_pipeline (basic_block load_bb, basic_block store_bb,
type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (addr)));
itype = TREE_TYPE (TREE_TYPE (cmpxchg));
if (!can_compare_and_swap_p (TYPE_MODE (itype), true))
if (!can_compare_and_swap_p (TYPE_MODE (itype), true)
|| !can_atomic_load_p (TYPE_MODE (itype)))
return false;
/* Load the initial value, replacing the GIMPLE_OMP_ATOMIC_LOAD. */