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FileCheck: Document CHECK-SAME, follow-up to r230612 

llvm-svn: 231379
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Duncan P. N. Exon Smith 2015-03-05 17:00:05 +00:00
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llvm/docs/CommandGuide/FileCheck.rst
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@ -185,6 +185,31 @@ For example, something like this works as you'd expect:
newline between it and the previous directive. A "``CHECK-NEXT:``" cannot be
the first directive in a file.
The "CHECK-SAME:" directive
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Sometimes you want to match lines and would like to verify that matches happen
on the same line as the previous match. In this case, you can use "``CHECK:``"
and "``CHECK-SAME:``" directives to specify this. If you specified a custom
check prefix, just use "``<PREFIX>-SAME:``".
"``CHECK-SAME:``" is particularly powerful in conjunction with "``CHECK-NOT:``"
(described below).
For example, the following works like you'd expect:
.. code-block:: llvm
!0 = !MDLocation(line: 5, scope: !1, inlinedAt: !2)
; CHECK: !MDLocation(line: 5,
; CHECK-NOT: column:
; CHECK-SAME: scope: ![[SCOPE:[0-9]+]]
"``CHECK-SAME:``" directives reject the input if there are any newlines between
it and the previous directive. A "``CHECK-SAME:``" cannot be the first
directive in a file.
The "CHECK-NOT:" directive
~~~~~~~~~~~~~~~~~~~~~~~~~~