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decodetree: Drop check for less than 2 patterns in a group

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While it makes little sense for the end product to have a group
containing only a single pattern, avoiding this case within an
incremental patch set is troublesome.

Because this is expected to be a transient condition, do not
bother "optimizing" this case, e.g. by folding away the group.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-06-08 10:41:49 -07:00
parent 33c0f25bfd
commit fe079aa13d
2 changed files with 13 additions and 2 deletions
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2
scripts/decodetree.py
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@ -1024,8 +1024,6 @@ def parse_file(f, parent_pat):
if name == '}' or name == ']':
if len(toks) != 0:
error(start_lineno, 'extra tokens after close brace')
if len(parent_pat.pats) < 2:
error(lineno, 'less than two patterns within braces')
# Make sure { } and [ ] nest properly.
if (name == '}') != isinstance(parent_pat, IncMultiPattern):