090f0d78f1
When __atomic_* builtins were introduced, omp-expand.c (omp-low.c at that point) has been adjusted in several spots so that it uses the atomic builtins instead of sync builtins, but expand_omp_atomic_pipeline has not because the __atomic_compare_exchange_* APIs take address of the argument, so it kept using __sync_val_compare_swap_*. That means it always uses seq_cst though. This patch changes it to use the ATOMIC_COMPARE_EXCHANGE ifn which gimple-fold folds __atomic_compare_exchange_* into - that ifn also passes expected directly. 2021-09-03 Jakub Jelinek <jakub@redhat.com> * omp-expand.c (expand_omp_atomic_pipeline): Use IFN_ATOMIC_COMPARE_EXCHANGE instead of BUILT_IN_SYNC_VAL_COMPARE_AND_SWAP_? so that memory order can be provided. |
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README
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