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  1. JDK
  2. JDK-6930116

loop predication code does not handle If nodes with only one projection

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    • Bug
    • Resolution: Fixed
    • P4
    • hs17
    • hs17
    • hotspot
    • None
    • b11
    • x86
    • solaris_10

    Backports

      Description

        [1] report_assertion_failure(file_name = 0xfffffd7ffee4e61f "/net/irkutsk/export/home/kvn/work2/hg/hs18_jdk6u20p/hotspot/src/share/vm/opto/multnode.cpp", line_no = 40, message = 0xfffffd7ffee4e67a "assert(Opcode() != Op_If || outcnt() == 2,"bad if #1")"), line 171 in "/net/irkutsk/export/home/kvn/work2/hg/hs18_jdk6u20p/hotspot/src/share/vm/utilities/debug.cpp"
          [2] MultiNode::proj_out(this = 0x3fefee0, which_proj = 0), line 40 in "/net/irkutsk/export/home/kvn/work2/hg/hs18_jdk6u20p/hotspot/src/share/vm/opto/multnode.cpp"
        =>[3] PhaseIdealLoop::is_uncommon_trap_if_pattern(this = 0xfffffd7fec7f9e80, proj = 0x3feff90, must_reason_predicate = false), line 1798 in "/net/irkutsk/export/home/kvn/work2/hg/hs18_jdk6u20p/hotspot/src/share/vm/opto/loopTransform.cpp"
          [4] PhaseIdealLoop::loop_predication_impl(this = 0xfffffd7fec7f9e80, loop = 0x2dfbac8), line 2193 in "/net/irkutsk/export/home/kvn/work2/hg/hs18_jdk6u20p/hotspot/src/share/vm/opto/loopTransform.cpp"

        [t@18 l@18]: print iff->dump(-2)
         17658 If === 17650 17588 [[ 17659 ]] P=0.500000, C=-1.000000
         17659 IfTrue === 17658 [[ 19297 ]] #1
         19297 Loop === 19297 17659 17694 [[ 19297 17688 17693 17664 17663 17662 ]] inner !orig=[17661]

        [t@18 l@18]: print iff->in(1)->dump(2)
         36 ConI === 0 [[ 37 52 ... ]] #int:1
         20367 Phi === 20360 20387 36 [[ 17587 ]] #bool !orig=[17559]
         17587 CmpI === _ 20367 36 [[ 17588 19129 ]]
         17588 Bool === _ 17587 [[ 17658 ]] [eq]

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                kvn Vladimir Kozlov
                kvn Vladimir Kozlov
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