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JIT: implement tail merging #77103

Merged
merged 8 commits into from
Oct 25, 2022
Merged

JIT: implement tail merging #77103

merged 8 commits into from
Oct 25, 2022

Commits on Oct 16, 2022

  1. JIT: implement tail merging 

    Add a phase that looks for common tail statements in a block's
predecessors and merges them.

Run it both before and after morph.

Closes dotnet#8795.
Closes dotnet#76872.
    @AndyAyersMS
    AndyAyersMS committed Oct 16, 2022
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Commits on Oct 17, 2022

  1. update block flags if we move a statement

    @AndyAyersMS
    AndyAyersMS committed Oct 17, 2022
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  2. Add range enable config setting. 

    Skip past GT_NOP, no point considering those for merging.

Fix logic error when finding cross jump victim -- need to
assess the first block in the loop.
    @AndyAyersMS
    AndyAyersMS committed Oct 17, 2022
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  3. remove assert; fix debug validation test

    @AndyAyersMS
    AndyAyersMS committed Oct 17, 2022
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Commits on Oct 18, 2022

  1. Remove an apparently unnecessary assert from loop recognition. 

    Add indir flag checking to `GenTree::Compare`.
    @AndyAyersMS
    AndyAyersMS committed Oct 18, 2022
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Commits on Oct 20, 2022

  1. add JitEnableTailMerge config setting

    @AndyAyersMS
    AndyAyersMS committed Oct 20, 2022
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Commits on Oct 21, 2022

  1. tweak

    @AndyAyersMS
    AndyAyersMS committed Oct 21, 2022
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  2. tweak

    @AndyAyersMS
    AndyAyersMS committed Oct 21, 2022
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