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Commit fd7eee64 authored by Lorenzo Chelini's avatar Lorenzo Chelini Committed by Nicolas Vasilache
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scf::ForOp: Fold away iterator arguments with no use and for which the... 

scf::ForOp: Fold away iterator arguments with no use and for which the corresponding input is yielded

Enhance 'ForOpIterArgsFolder' to remove unused iteration arguments in a
scf::ForOp. If the block argument corresponding to the given iterator has no
use and the yielded value equals the input, we fold it away.

Reviewed By: nicolasvasilache

Differential Revision: https://reviews.llvm.org/D98503
parent 67824179
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