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Improve/fix loop-invariant code motion #13

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jleben opened this issue Mar 19, 2018 · 0 comments
Open

Improve/fix loop-invariant code motion #13

jleben opened this issue Mar 19, 2018 · 0 comments
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bug optimization

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@jleben
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jleben commented Mar 19, 2018 •
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  • Loop invariant code motion is currently only done on array index expressions.
  • It assumes only a few possible types of subexpressions.
  • It also assumes all function calls have no side effects (like std::max for example).
  • The newly generated identifiers could clash with those from source program.
  • It would produce much nicer code if followed by common subexpression elimination
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