Alexis Engelke d871b2e0d0 [CodeGen] Use optimized domtree for MachineFunction (#102107) ...

The dominator tree gained an optimization to use block numbers instead
of a DenseMap to store blocks. Given that machine basic blocks already
have numbers, expose these via appropriate GraphTraits. For debugging,
block number epochs are added to MachineFunction -- this greatly helps
in finding uses of block numbers after RenumberBlocks().

In a few cases where dominator trees are preserved across renumberings,
the dominator tree is updated to use the new numbers.

2024-08-06 13:46:19 +02:00

7.2 KiB

Raw Blame History

View Raw