Extract some bits from the AMDGPU PR

[maleadt]

#2

[codecov]

Codecov Report

Merging #8 into master will increase coverage by 0.05%.
The diff coverage is 92.30%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
+ Coverage   73.58%   73.64%   +0.05%     
==========================================
  Files          16       16              
  Lines        1007     1013       +6     
==========================================
+ Hits          741      746       +5     
- Misses        266      267       +1     

Impacted Files	Coverage Δ
src/driver.jl	58.10% <80.00%> (+0.36%)	⬆️
src/mcgen.jl	100.00% <100.00%> (ø)
src/rtlib.jl	94.20% <100.00%> (+0.26%)	⬆️

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