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[FileCheck] Added documentation for --allow-unused-prefixes

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Differential Revision: https://reviews.llvm.org/D90621
This commit is contained in:
Mircea Trofin 2020-11-02 08:46:53 -08:00
parent 870b03306d
commit f2bff76dd3
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docs/CommandGuide/FileCheck.rst
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@ -64,6 +64,16 @@ and from the command line.
comment style. In that case, consider proposing a change to the default
comment prefixes instead.
.. option:: --allow-unused-prefixes
This option controls the behavior when using more than one prefix as specified
by :option:`--check-prefix` or :option:`--check-prefixes`, and some of these
prefixes are missing in the test file. If true, this is allowed, if false,
FileCheck will report error, listing the missing prefixes.
It is currently, temporarily, true by default, and will be subsequently
switched to false.
.. option:: --input-file filename
File to check (defaults to stdin).