All other variables get undefined after each encountered ``CHECK-LABEL``.
+.. option:: -D<VAR=VALUE>
+
+ Sets a filecheck variable ``VAR`` with value ``VALUE`` that can be used in
+ ``CHECK:`` lines.
+
.. option:: -version
Show the version number of this program.
--- /dev/null
+; RUN: FileCheck -DVALUE=10 -input-file %s %s
+; RUN: not FileCheck -DVALUE=20 -input-file %s %s 2>&1 | FileCheck %s -check-prefix ERRMSG
+
+Value = 10
+; CHECK: Value = [[VALUE]]
+
+; ERRMSG: defines.txt:5:10: error: expected string not found in input
+; ERRMSG: defines.txt:1:1: note: with variable "VALUE" equal to "20"
+; ERRMSG: defines.txt:4:1: note: possible intended match here
"this pattern occur which are not matched by a positive pattern"),
cl::value_desc("pattern"));
+static cl::list<std::string> GlobalDefines("D", cl::Prefix,
+ cl::desc("Define a variable to be used in capture patterns."),
+ cl::value_desc("VAR=VALUE"));
+
static cl::opt<bool> AllowEmptyInput(
"allow-empty", cl::init(false),
cl::desc("Allow the input file to be empty. This is useful when making\n"
/// VariableTable - This holds all the current filecheck variables.
StringMap<StringRef> VariableTable;
+ for (const auto& Def : GlobalDefines)
+ VariableTable.insert(StringRef(Def).split('='));
+
unsigned i = 0, j = 0, e = CheckStrings.size();
while (true) {
StringRef CheckRegion;