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scudo: Simplify getClassIdBySize() logic. NFCI.

Authored by pcc on Feb 3 2020, 4:34 PM.



By subtracting 1 from Size at the beginning we can simplify the
subsequent calculations. This also saves 4 instructions on aarch64
and 9 instructions on x86_64, but seems to be perf neutral.

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pcc created this revision.Feb 3 2020, 4:34 PM
Herald added projects: Restricted Project, Restricted Project. · View Herald TranscriptFeb 3 2020, 4:35 PM
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Unit tests: pass. 62433 tests passed, 0 failed and 845 were skipped.

clang-tidy: pass.

clang-format: pass.

Build artifacts: diff.json, clang-tidy.txt, clang-format.patch, CMakeCache.txt, console-log.txt, test-results.xml

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cryptoad accepted this revision.Feb 4 2020, 9:02 AM
This revision is now accepted and ready to land.Feb 4 2020, 9:02 AM
This revision was automatically updated to reflect the committed changes.