Cutting Edge Toolchain (Latest Features in GCC/GLIBC)
summary
Covers concrete GCC 8/9 and glibc 2.29 changes: compiler adds control‑flow protection with shadow stack plus indirect‑branch tracking (CET/IBT when hardware exists) and options like full/branch/return/none; -O3 gains -floop-interchange and hoisting/partial‑redundancy elimination that improve cache behavior; glibc replaces heavy trig code with Taylor approximations for sin/cos yielding ~20–40% microbenchmark speedups; diagnostics now emit -fdiagnostics-format=json and can auto‑generate patches; glibc adds getcpu() wrapper.
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chapters (4)
- 0:00Start
- 17:53Memory facts
- 19:49Code hoisting optimization
- 23:47Optimizations to the generic mathematical functions
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