JDK-8142303 : C2 compilation fails with "bad AD file"
  • Type: Bug
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 9
  • Priority: P2
  • Status: Closed
  • Resolution: Fixed
  • Submitted: 2015-11-09
  • Updated: 2017-08-07
  • Resolved: 2015-11-27
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9 b97Fixed
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Default case invoked for: 
   opcode  = 81, "Con"
o1	Con	=== o0  [[]]  #top

--N: o1	Con	=== o0  [[]]  #top

# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc:  SuppressErrorAt=/matcher.cpp:1606
# A fatal error has been detected by the Java Runtime Environment:
#  Internal Error (/oracle/8141629/hotspot/src/share/vm/opto/matcher.cpp:1606), pid=26113, tid=26135
#  assert(false) failed: bad AD file

Fix verified by regression test.

ILW = Assert in compiler, reproduces with CTW, no workaround = MHH = P2