JDK-8294356 : IGV: scheduled graphs contain duplicated elements
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 20
  • Priority: P5
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2022-09-26
  • Updated: 2022-10-17
  • Resolved: 2022-10-11
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JDK 20
20 b19Fixed
Related Reports
Relates :  
JDK-7024475 - loop doesn't terminate when compiled
Description
Ideal graphs dumped after GCM contain duplicated nodes and edges. This leads to duplication in edge tooltips (sea of nodes views, see sea.png) and node input lists (control-flow graph view, see cfg.png), and adds unnecessary overhead to the graph files.

To reproduce the issue:

1. Run IGV
2. Run $ java -Xbatch -XX:PrintIdealGraphLevel=1
3. Open any 'Final Code' graph
4. Look at edge tooltips in the sea of nodes view or node input lists in the control-flow graph view.
Comments
Changeset: 97f1321c Author: Roberto Castañeda Lozano <rcastanedalo@openjdk.org> Date: 2022-10-11 07:13:00 +0000 URL: https://git.openjdk.org/jdk/commit/97f1321cb455b536f1e4e056dec693c24f39d641
11-10-2022
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/10423 Date: 2022-09-26 13:55:56 +0000
26-09-2022
The bug was introduced by JDK-7024475 but has only become visible now with the recent additions of edge tooltips (JDK-8265433) and a control-flow view (JDK-8282547).
26-09-2022
ILW = Duplicated edges in tooltips, only in sea of nodes view, no workaround = LLH = P5
26-09-2022