vendor/llvm/llvm-trunk-r161861

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diff --git a/docs/CommandGuide/llvm-cov.rst b/docs/CommandGuide/llvm-cov.rst
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+llvm-cov - emit coverage information
+====================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-cov** [-gcno=filename] [-gcda=filename] [dump]
+
+
+DESCRIPTION
+-----------
+
+
+The experimental **llvm-cov** tool reads in description file generated by compiler
+and coverage data file generated by instrumented program. This program assumes
+that the description and data file uses same format as gcov files.
+
+
+OPTIONS
+-------
+
+
+
+**-gcno=filename]**
+
+ This option selects input description file generated by compiler while instrumenting
+ program.
+
+
+
+**-gcda=filename]**
+
+ This option selects coverage data file generated by instrumented compiler.
+
+
+
+**-dump**
+
+ This options enables output dump that is suitable for a developer to help debug
+ **llvm-cov** itself.
+
+
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-cov** returns 1 if it cannot read input files. Otherwise, it exits with zero.