tree 661408f720ef940cc3e68240c3b5a08f6b72ff65
parent a3ccaa9b8828b5a3322913adfd43b1158ff4c602
author Roman Tereshin <rtereshin@apple.com> 1527041059 +0000
committer Roman Tereshin <rtereshin@apple.com> 1527041059 +0000

[GlobalISel][InstructionSelect] MatchTable second level grouping, perf patch 5

This patch continues a series of patches started by r332907 (reapplied
as r332917)

In this commit we start grouping rules with common first condition on
the second level of the table.

This is expected to decrease time GlobalISel spends in its
InstructionSelect pass by roughly 13% for an -O0 build as measured on
sqlite3-amalgamation (http://sqlite.org/download.html) targeting
AArch64.

Reviewers: qcolombet, dsanders, bogner, aemerson, javed.absar

Reviewed By: qcolombet

Subscribers: rovka, llvm-commits, kristof.beyls

Differential Revision: https://reviews.llvm.org/D44700

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333053 91177308-0d34-0410-b5e6-96231b3b80d8