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2018 May 16
0
Bug in TailDuplicator?
Hi,
I think there might be a bug in the tail duplicator (called from
MachineBlockPlacement in my case), when duplicating a block that
contains an implicit fall-through.
Suppose you have the following blocks
BB#1:
Predecessors according to CFG: BB#2
...
conditional_branch <BB#3>
< implicit fall-through to BB#2 >
Successors according to CFG: BB#2 BB#3
BB#2:
Predecessors according to CFG: BB#1 BB#0
...
unconditional_branch <BB#1>
Successors according to CFG: BB#1
BB#3:
Predecessors according to CFG: BB#1
...
It dup...