This is a feature that Peter requested for completing the
neon decodetree conversion.

I ought to write some more test cases for this, but the change to
t32.decode proves it is minimally functional.  I'm undecided if I
should add errors for useless nesting of these within other non-
overlapping groups.  While useless, it's likely still functional.


r~


Richard Henderson (8):
  decodetree: Remove python 3.4 check
  decodetree: Tidy error_with_file
  decodetree: Rename MultiPattern to IncMultiPattern
  decodetree: Split out MultiPattern from IncMultiPattern
  decodetree: Allow group covering the entire insn space
  decodetree: Move semantic propagation into classes
  decodetree: Implement non-overlapping groups
  target/arm: Use a non-overlapping group for misc control

 target/arm/t32.decode                         |   4 +-
 ...decode => succ_pattern_group_nest2.decode} |   2 +-
 scripts/decodetree.py                         | 539 ++++++++++--------
 3 files changed, 307 insertions(+), 238 deletions(-)
 rename tests/decode/{err_pattern_group_nest1.decode => succ_pattern_group_nest2.decode} (85%)

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2.20.1