Allow '_' in FileCheck variable names, it is nice to have at least one
separate character.
- Chris, OK?
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89626 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/FileCheck.pod b/docs/CommandGuide/FileCheck.pod
index d3f640d..32516ad 100644
--- a/docs/CommandGuide/FileCheck.pod
+++ b/docs/CommandGuide/FileCheck.pod
@@ -224,7 +224,7 @@
the variables "REGISTER". The second line verifies that whatever is in REGISTER
occurs later in the file after an "andw". FileCheck variable references are
always contained in <tt>[[ ]]</tt> pairs, are named, and their names can be
-formed with the regex "<tt>[a-zA-Z][a-zA-Z0-9]*</tt>". If a colon follows the
+formed with the regex "<tt>[a-zA-Z_][a-zA-Z0-9_]*</tt>". If a colon follows the
name, then it is a definition of the variable, if not, it is a use.
FileCheck variables can be defined multiple times, and uses always get the