[MIR] Reset unique MBB numbering in MachineFunction::reset()

No need to waste space nor number MBBs differently if MF gets recreated.

Reviewers: qcolombet, stoklund, t.p.northover, bogner, javed.absar

Reviewed By: qcolombet

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D46078


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331213 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed