tree b84f4c83b1fb5b39e3f4223d9601aac7ec9e3281
parent 1bd774409d87a919fb84a6028d19dd817ca77c4d
author Matt Arsenault <Matthew.Arsenault@amd.com> 1552423332 +0000
committer Matt Arsenault <Matthew.Arsenault@amd.com> 1552423332 +0000

MIR: Stop reinitializing target information for every use

Every time a physical register reference was parsed, this would
initialize a string map for every register in in target, and discard
it for the next. The same applies for the other fields initialized
from target information.

Follow along with how the function state is tracked, and add a new
tracking class for target information.

The string->register class/register bank for some reason were kept
separately, so track them in the same place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@355970 91177308-0d34-0410-b5e6-96231b3b80d8