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  1. JDK
  2. JDK-8280568

IGV: Phi inputs and pinned nodes are not scheduled correctly

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      Nodes aren't shown in correct blocks, even if they have explicit control. In attached image all nodes encircled should be drawn in other blocks, for two reasons: pinned nodes should be scheduled in the same block as the nodes they are pinned to, and phi inputs should be scheduled above the block in which the phi node is scheduled.

      To reproduce the issue shown in the picture, open the graph file alloc.xml (included in the attached ZIP bundle), open the graph "Optimize finished", and open the mode "Cluster nodes into blocks". The graph file itself is generated by compiling the simple program SimpleAlloc.java (also included in the attached ZIP bundle) with JDK 17 as follows:

      $ java -XX:+PrintOpto -XX:CompileCommand=IGVPrintLevel,SimpleAlloc::testAllocArray,4 -XX:CompileCommand=compileonly,*::testAllocArray -XX:PrintIdealGraphFile=alloc.xml SimpleAlloc.java

        1. alloc.png
          alloc.png
          332 kB
        2. alloc.zip
          40 kB

            rcastanedalo Roberto Castaneda Lozano
            neliasso Nils Eliasson (Inactive)
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              Created:
              Updated:
              Resolved: