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...rg/extra_files/souper-jul-15.html > <https://urldefense.proofpoint.com/v2/url?u=http-3A__blog.regehr.org_extra-5Ffiles_souper-2Djul-2D15.html&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=Mfk2qtn1LTDThVkh6-oGglNfMADXfJdty4_bhmuhMHA&m=Zws35DV5cT6VNt0_Wc8MbZqd8-UXh4q602LshCf-frE&s=2cBkApfDIxWcm7AqVD7-qdjeHG3okw8lDLBn_URJO2s&e=> > > > > My impression is that while there's clearly plenty of material in > > here that doesn't want to get implemented in an opt pass, there are > > a number of gems hiding in there that are worth implementing. >...

One thing that is important to consider is where in the pipeline these kinds of optimizations fit. We normally try to put the IR into a canonical simplified form in the mid-level optimizer. This form is supposed to be whatever is most useful for exposing other optimizations, and for lowering, but only in a generic sense. We do have some optimizations near the end of our pipeline (vectorization,