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backend: dwarfdbginf: Use LEB128 encoding for lines and columns #13246

Merged
merged 1 commit into from Jan 7, 2022
Merged

backend: dwarfdbginf: Use LEB128 encoding for lines and columns #13246

merged 1 commit into from Jan 7, 2022

Commits on Oct 31, 2021

  1. backend: dwarfdbginf: Use LEB128 encoding for lines and columns 

    Using variable length form for lines and columns in debug info can decrease
binary size from 1.04% for 16-bit and 3.06% for 32-bit according to my tests.
These numbers were based on 100 000 functions with 4 variables. Increasing the
line count makes less difference, increasing the variable count makes more
difference. Overall it reduces the binary size on all tests.

This adds the LEB128 encoding overhead however a SIMD implementation can be
taken to consideration since the current implementation uses manual for loop.

Signed-off-by: Luís Ferreira <contact@lsferreira.net>
    @ljmf00
    ljmf00 committed Oct 31, 2021
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