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from be7ae28b635 [x86/SLH] Teach SLH to harden indirect branches and switche [...] new 81a94dc6378 Do not leak the Mach host port in sys::getHostCPUName() new 2ec0ce0cc30 [x86/SLH] Teach SLH to harden against the "ret2spec" attack [...]

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Summary of changes: docs/SpeculativeLoadHardening.md | 7 +- lib/Support/Host.cpp | 4 +- lib/Target/X86/X86SpeculativeLoadHardening.cpp | 183 ++++++-- .../X86/speculative-load-hardening-call-and-ret.ll | 485 +++++++++++++++++++++ .../X86/speculative-load-hardening-indirect.ll | 62 ++- test/CodeGen/X86/speculative-load-hardening.ll | 191 ++++++-- 6 files changed, 840 insertions(+), 92 deletions(-) create mode 100644 test/CodeGen/X86/speculative-load-hardening-call-and-ret.ll