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from a842dd5493b * gcc.target/i386/pr79683.c: Disable costmodel. * i386.c [...] new 92ac8192dd3 Update x86 backend to enable Intel CET. new e2dea65c0ec Add x86 CET documentation.

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Summary of changes: gcc/ChangeLog | 71 +++++++ gcc/common/config/i386/i386-common.c | 33 ++++ gcc/config.gcc | 7 +- gcc/config/i386/cet.c | 76 ++++++++ gcc/config/i386/cetintrin.h | 134 +++++++++++++ gcc/config/i386/cpuid.h | 2 + gcc/config/i386/driver-i386.c | 8 +- gcc/config/i386/i386-builtin-types.def | 2 + gcc/config/i386/i386-builtin.def | 23 ++- gcc/config/i386/i386-c.c | 12 ++ gcc/config/i386/i386-passes.def | 2 + gcc/config/i386/i386-protos.h | 1 + gcc/config/i386/i386.c | 330 ++++++++++++++++++++++++++++++++- gcc/config/i386/i386.h | 4 + gcc/config/i386/i386.md | 189 ++++++++++++++++++- gcc/config/i386/i386.opt | 20 ++ gcc/config/i386/immintrin.h | 2 + gcc/config/i386/linux-common.h | 5 + gcc/config/{t-netbsd => i386/t-cet} | 6 +- gcc/doc/extend.texi | 19 ++ gcc/doc/invoke.texi | 41 +++- 21 files changed, 973 insertions(+), 14 deletions(-) create mode 100644 gcc/config/i386/cet.c create mode 100644 gcc/config/i386/cetintrin.h copy gcc/config/{t-netbsd => i386/t-cet} (90%)