eddecd3ade
This should fix the regressions introduced by a53d940cee6f by making sure no dynamic allocations are needed in the common case, while retaining support for arbitrary SCEV expressions. Alternative to D144335. Compile-time impact: * NewPM-O3: -0.11% * NewPM-ReleaseThinLTO: -0.10% *NewPM-ReleaseLTO-g: -0.08% https://llvm-compile-time-tracker.com/compare.php?from=df016a9525e5722dfd1e1e1632cec3ed7b33bc8a&to=c1c64de4a973bcecaddbc4038a539234eb39413b&stat=instructions:u Reviewed By: vitalybuka, nikic Differential Revision: https://reviews.llvm.org/D144382