[all-commits] [llvm/llvm-project] d2b896: [EdgeBundles] Correct MBB label name in output gra...

[Kai Luo via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d2b8969b7593fd01991a2089828e6256945874cf
      https://github.com/llvm/llvm-project/commit/d2b8969b7593fd01991a2089828e6256945874cf
  Author: Kai Luo <gluokai at gmail.com>
  Date:   2024-08-30 (Fri, 30 Aug 2024)

  Changed paths:
    M llvm/lib/CodeGen/EdgeBundles.cpp

  Log Message:
  -----------
  [EdgeBundles] Correct MBB label name in output graph when `-view-edge-bundles`. NFC. (#106661)

With `-view-edge-bundles`, before the change, the dot file output is
kinda like
```dot
digraph {
        "%bb.0" [ shape=box ]
        0 -> "%bb.0"
        "%bb.0" -> 1
        "%bb.0" -> "%bb.1" [ color=lightgray ]
        "%bb.0" -> "%bb.6" [ color=lightgray ]
        "%bb.1" [ shape=box ]
        1 -> "%bb.1"
        "%bb.1" -> 1
        "%bb.1" -> "%bb.2" [ color=lightgray ]
        "%bb.1" -> "%bb.6" [ color=lightgray ]
        "%bb.2" [ shape=box ]
        1 -> "%bb.2"
        "%bb.2" -> 1
        "%bb.2" -> "%bb.3" [ color=lightgray ]
        "%bb.3" [ shape=box ]
        1 -> "%bb.3"
        "%bb.3" -> 2
        "%bb.3" -> "%bb.4" [ color=lightgray ]
        "%bb.4" [ shape=box ]
        2 -> "%bb.4"
        "%bb.4" -> 2
        "%bb.4" -> "%bb.4" [ color=lightgray ]
        "%bb.4" -> "%bb.5" [ color=lightgray ]
        "%bb.5" [ shape=box ]
        2 -> "%bb.5"
        "%bb.5" -> 1
        "%bb.5" -> "%bb.6" [ color=lightgray ]
        "%bb.5" -> "%bb.3" [ color=lightgray ]
        "%bb.6" [ shape=box ]
        1 -> "%bb.6"
        "%bb.6" -> 3
}
```
However, the graph output by graphviz is

![t](https://github.com/user-attachments/assets/24056c0a-3ba9-49c3-a5da-269f3140e619)
The node name corresponding to the MBB is incorrect.
After the change, the node name is consistent with MBB's name.

![s](https://github.com/user-attachments/assets/38c649d1-7222-4de1-971c-56f7721ab64c)



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