tree 060d6efc221562a24563e1013331d252cc7037a5
parent f7c59179cfa9f74380c7097d822c8c93369b32ac
author Craig Topper <craig.topper@sifive.com> 1613703058 -0800
committer Copybara-Service <copybara-worker@google.com> 1613735224 -0800

[RISCV] Enable PrimaryKeyEarlyOut on RISCVVPseudosTable.

This table is queried in RISCVMCInstLower without knowing
whether the instruction is a vector pseudo. Due to the way the
binary search works, we have to do log2(tablesize) checks just
to determine a non-vector instruction isn't in the table.

Conveniently, all the vector pseudos are pretty tightly
packed within the internal instruction enum. By enabling the
PrimaryKeyEarlyOut, tablegen will emit a check against the
beginning and end of the table before doing the binary search.
This gives a quick early out on the search for the majority
of non-vector instructions.

Differential Revision: https://reviews.llvm.org/D97016

GitOrigin-RevId: cf34559104d3531e98e16ea242b777f18d5f95cf