Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-8210703

vmStructs.cpp compiled with -O0

    XMLWordPrintable

    Details

    • Subcomponent:
    • Resolved In Build:
      b12

      Backports

        Description

        For the JDK 8 build vmStructs.o is compiled with default optimization level, which is -O3 for release. In JDK 9+ it's being compiled with -O0. It appears this was a porting artifact of this change:

        http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/e796d52ca85b

        The intention was to add -fno-var-tracking-assignments for vmStructs's compilation. But since the old build overwrote default opt flags when per-file overrides get added the port of the change to the JDK 9+ build system added explicit -O0. The former seems intentional the latter not so much.

        More info here:
        http://mail.openjdk.java.net/pipermail/build-dev/2018-September/023216.html

          Attachments

            Issue Links

              Activity

                People

                Assignee:
                sgehwolf Severin Gehwolf
                Reporter:
                sgehwolf Severin Gehwolf
                Votes:
                0 Vote for this issue
                Watchers:
                1 Start watching this issue

                  Dates

                  Created:
                  Updated:
                  Resolved: