tree 2f8635dee62565dcc1c58a12c21e283211cccb7e
parent f6bd63ceaedf72f80a50b1b9199848cd681e137c
author Matt Arsenault <Matthew.Arsenault@amd.com> 1650076553 -0400
committer Copybara-Service <copybara-worker@google.com> 1654611806 -0700

llvm-reduce: Add cloning of target MachineFunctionInfo

MIR support is totally unusable for AMDGPU without this, since the set
of reserved registers is set from fields here.

Add a clone method to MachineFunctionInfo. This is a subtle variant of
the copy constructor that is required if there are any MIR constructs
that use pointers. Specifically, at minimum fields that reference
MachineBasicBlocks or the MachineFunction need to be adjusted to the
values in the new function.

GitOrigin-RevId: cc5a1b3dd9039d50f6b9caa679d60398f0cec65f