Arthur Eubanks 0c03f48480 Revert "InstSimplify: Require instruction be parented"
This reverts commit 1536e299e63d7788f38117b0212ca50eb76d7a3b.

Causes large binary size regressions, see comments on https://reviews.llvm.org/rG1536e299e63d7788f38117b0212ca50eb76d7a3b.
2023-06-16 11:24:29 -07:00
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