Add a way to query the number of input files.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82957 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvmc/doc/LLVMC-Reference.rst b/tools/llvmc/doc/LLVMC-Reference.rst
index 7e609a7..5d3b02a 100644
--- a/tools/llvmc/doc/LLVMC-Reference.rst
+++ b/tools/llvmc/doc/LLVMC-Reference.rst
@@ -458,6 +458,13 @@
- ``empty`` - The opposite of ``not_empty``. Equivalent to ``(not (not_empty
X))``. Provided for convenience.
+ - ``single_input_file`` - Returns true if there was only one input file
+ provided on the command-line. Used without arguments:
+ ``(single_input_file)``.
+
+ - ``multiple_input_files`` - Equivalent to ``(not (single_input_file))`` (the
+ case of zero input files is considered an error).
+
- ``default`` - Always evaluates to true. Should always be the last
test in the ``case`` expression.
diff --git a/tools/llvmc/plugins/Base/Base.td.in b/tools/llvmc/plugins/Base/Base.td.in
index d4bff17..4b964e3 100644
--- a/tools/llvmc/plugins/Base/Base.td.in
+++ b/tools/llvmc/plugins/Base/Base.td.in
@@ -70,6 +70,8 @@
!strconcat(cmd_prefix, " -c $INFILE -o $OUTFILE -emit-llvm"))),
(actions
(case
+ (and (multiple_input_files), (or (switch_on "S"), (switch_on "c"))),
+ (error "cannot specify -o with -c or -S with multiple files"),
(switch_on "E"), [(stop_compilation), (output_suffix E_ext)],
(and (switch_on "emit-llvm"), (switch_on "S")),
[(output_suffix "ll"), (stop_compilation)],