[PATCH] D85046: [SCEV] If Start >= RHS, simplify (Start smin RHS) to RHS for trip counts (PR46924, PR46939)

[Florian Hahn via Phabricator via llvm-commits]

fhahn added a comment.

In D85046#2191535 <https://reviews.llvm.org/D85046#2191535>, @nikic wrote:

> For the record, this was a 1% compile-time regression on SPASS (https://llvm-compile-time-tracker.com/compare.php?from=7ba82a7320df82d07d3d5679bce89b14526b536c&to=ee1c12708a4519361729205168dedb2b61bc2638&stat=instructions). This seems to be caused due to a 2.3% increase in code size (https://llvm-compile-time-tracker.com/compare.php?from=7ba82a7320df82d07d3d5679bce89b14526b536c&to=ee1c12708a4519361729205168dedb2b61bc2638&stat=size-text), with some of the files getting 20-30% larger. Not particularly unexpected for this kind of change though.

After this change ~100 more loops are unrolled in SPASS, which likely causes the increase.


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https://reviews.llvm.org/D85046