[FastISel] NFC: Clean up unnecessary bookkeeping
authorPaul Robinson <paul.robinson@sony.com>
Mon, 11 Jan 2021 17:33:55 +0000 (09:33 -0800)
committerPaul Robinson <paul.robinson@sony.com>
Mon, 11 Jan 2021 17:40:39 +0000 (09:40 -0800)
commit1f9c29228cecfde9e993cd2818d9cd3119189163
tree117146afaf5dbef9c6cfd8d8e0313a60a6dcc455
parent171771e0780fd5d028a24f8650a11299478df266
[FastISel] NFC: Clean up unnecessary bookkeeping

Now that we flush the local value map for every instruction, we don't
need any extra flushes for specific cases.  Also, LastFlushPoint is
not used for anything.  Follow-ups to #c161665 (D91734).

This reapplies #3fd39d3.

Differential Revision: https://reviews.llvm.org/D92338
llvm/include/llvm/CodeGen/FastISel.h
llvm/lib/CodeGen/SelectionDAG/FastISel.cpp