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from c512a43092a Daily bump. new 20da13e395b aarch64: New Straight Line Speculation (SLS) mitigation flags new dc586a74922 aarch64: Introduce SLS mitigation for RET and BR instructions new 2155170525f aarch64: Mitigate SLS for BLR instruction

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Summary of changes: gcc/config/aarch64/aarch64-protos.h | 5 + gcc/config/aarch64/aarch64.c | 342 ++++++++++++++++++++- gcc/config/aarch64/aarch64.h | 25 +- gcc/config/aarch64/aarch64.md | 86 ++++-- gcc/config/aarch64/aarch64.opt | 4 + gcc/config/aarch64/constraints.md | 9 + gcc/config/aarch64/predicates.md | 3 +- gcc/doc/invoke.texi | 12 + .../aarch64/sls-mitigation/sls-miti-blr-bti.c | 40 +++ .../aarch64/sls-mitigation/sls-miti-blr.c | 33 ++ .../aarch64/sls-mitigation/sls-miti-retbr-pacret.c | 15 + .../aarch64/sls-mitigation/sls-miti-retbr.c | 119 +++++++ .../aarch64/sls-mitigation/sls-mitigation.exp | 73 +++++ gcc/testsuite/lib/target-supports.exp | 3 +- 14 files changed, 735 insertions(+), 34 deletions(-) create mode 100644 gcc/testsuite/gcc.target/aarch64/sls-mitigation/sls-miti-blr-bti.c create mode 100644 gcc/testsuite/gcc.target/aarch64/sls-mitigation/sls-miti-blr.c create mode 100644 gcc/testsuite/gcc.target/aarch64/sls-mitigation/sls-miti-retbr- [...] create mode 100644 gcc/testsuite/gcc.target/aarch64/sls-mitigation/sls-miti-retbr.c create mode 100644 gcc/testsuite/gcc.target/aarch64/sls-mitigation/sls-mitigation.exp