tree aa86088bf70010e00a4124821b1113d3ea37774a
parent b121d23a9cea711e832505c0b2495de6a51591c1
author Guozhi Wei <carrot@google.com> 1638241319 -0800
committer Guozhi Wei <carrot@google.com> 1638241319 -0800

[TwoAddressInstructionPass] Create register mapping for registers with multiple uses in the current MBB

Currently we create register mappings for registers used only once in current
MBB. For registers with multiple uses, when all the uses are in the current MBB,
we can also create mappings for them similarly according to the last use.
For example

    %reg101 = ...
            = ... reg101
    %reg103 = ADD %reg101, %reg102

We can create mapping between %reg101 and %reg103.

Differential Revision: https://reviews.llvm.org/D113193