[PATCH 0/19][GCC-8] aarch64: Backport outline atomics

[Andre Vieira (lists)]

Hi,

This series backports all the patches and fixes regarding outline 
atomics to the gcc-8 branch.

Bootstrapped the series for aarch64-linux-gnu and regression tested.
Is this OK for gcc-8?

Andre Vieira (19):
aarch64: Add early clobber for aarch64_store_exclusive
aarch64: Simplify LSE cas generation
aarch64: Improve cas generation
aarch64: Improve swp generation
aarch64: Improve atomic-op lse generation
aarch64: Remove early clobber from ATOMIC_LDOP scratch
aarch64: Extend %R for integer registers
aarch64: Implement TImode compare-and-swap
aarch64: Tidy aarch64_split_compare_and_swap
aarch64: Add out-of-line functions for LSE atomics
Add visibility to libfunc constructors
aarch64: Implement -moutline-atomics
Aarch64: Fix shrinkwrapping interactions with atomics (PR92692)
aarch64: Fix store-exclusive in load-operate LSE helpers
aarch64: Configure for sys/auxv.h in libgcc for lse-init.c
aarch64: Fix up aarch64_compare_and_swaphi pattern [PR94368]
aarch64: Fix bootstrap with old binutils [PR93053]
aarch64: Fix ICE due to aarch64_gen_compare_reg_maybe_ze [PR94435]
re PR target/90724 (ICE with __sync_bool_compare_and_swap with 
-march=armv8.2-a+sve)