nikic wrote:

This change seems to cause significant compile-time regressions for C++ code 
(https://llvm-compile-time-tracker.com/compare.php?from=184ba038ac1d444980b3e554b0057f3f30c516ab&to=4082a7554521572a65a5a0008c4661a534df659d&stat=instructions%3Au).

Probably most damning are the times for the clang build itself 
(https://llvm-compile-time-tracker.com/compare_clang.php?from=184ba038ac1d444980b3e554b0057f3f30c516ab&to=4082a7554521572a65a5a0008c4661a534df659d&stat=instructions%3Au&sortBy=interestingness)
 where files like X86ISelDAGToDAG.cpp regress by >3% even in an optimized build.

https://github.com/llvm/llvm-project/pull/88546
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