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  1. JDK
  2. JDK-8313262

C2: Sinking node may cause required cast to be dropped

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    • b12

    Backports

      Description

        Recent regression, bisected to JDK-8303279.

        There are plenty of tier1 tests failing with TEST_VM_OPTS="-XX:+UseShenandoahGC".

        A sample failure is:

        $ CONF=linux-x86_64-server-fastdebug make reconfigure clean test TEST=java/lang/reflect/PublicMethods/PublicMethodsTest.java TEST_VM_OPTS="-XX:+UseShenandoahGC"

        # Internal Error (/home/shipilev/shipilev-jdk/src/hotspot/share/opto/subtypenode.cpp:37), pid=10644, tid=10672
        # assert(sub_t != Type::TOP && !TypePtr::NULL_PTR->higher_equal(sub_t)) failed: should be not null
        #
        # JRE version: OpenJDK Runtime Environment (22.0) (fastdebug build 22-internal-adhoc.shipilev.shipilev-jdk)
        # Java VM: OpenJDK 64-Bit Server VM (fastdebug 22-internal-adhoc.shipilev.shipilev-jdk, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, shenandoah gc, linux-amd64)
        # Problematic frame:
        # V [libjvm.so+0x168c4c1] SubTypeCheckNode::sub(Type const*, Type const*) const+0x191

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8315308 C2: Sinking node may cause required cast to be dropped

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8314983 C2: Sinking node may cause required cast to be dropped

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8315309 C2: Sinking node may cause required cast to be dropped

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            relates to

            Enhancement - null JDK-8252372 Check if cloning is required to move loads out of loops in PhaseIdealLoop::split_if_with_blocks_post()

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8303279 C2: crash in SubTypeCheckNode::sub() at IGVN split if

            • P3 - Major loss of function.
            • Resolved
            links to

            Commit Commit openjdk/jdk17u-dev/25efeccb

            Commit Commit openjdk/jdk21u/511224ac

            Commit Commit openjdk/jdk/1cee3b9f

            Review Review openjdk/jdk17u-dev/1690

            Review Review openjdk/jdk21u/99

            Review Review openjdk/jdk/15380

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                roland Roland Westrelin
                shade Aleksey Shipilev
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                Dates

                  Created:
                  Updated:
                  Resolved: