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from a651bb35355 reassociation: Fix canonical ordering in some cases new a3d141316c4 AArch64: Use dmb ishld+ishst for release fence new 7fdfeb27c69 AArch64: Improve ctz and ffs new c9f702dc6ae AArch64: Add cssc as arch attr

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Summary of changes: gcc/config/aarch64/aarch64.md | 74 +++++++++++++++++----------------- gcc/config/aarch64/atomics.md | 6 +++ gcc/testsuite/gcc.target/aarch64/ffs.c | 65 +++++++++++++++++++++++++---- 3 files changed, 100 insertions(+), 45 deletions(-)