Corrected usage synopsis.
Added information regarding additional LLVM passes used, input defaults, and
output defaults.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8802 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/extract.html b/docs/CommandGuide/extract.html
index 36f01e4..b42aec2 100644
--- a/docs/CommandGuide/extract.html
+++ b/docs/CommandGuide/extract.html
@@ -20,7 +20,7 @@
SYNOPSIS
</h3>
-extract [options] <filename> [filename ...]
+extract [options] [filename]
<h3>
DESCRIPTION
</h3>
@@ -28,6 +28,14 @@
The extract command takes the name of a function and extracts it from the
specified LLVM bytecode file. It is primarily used as a debugging tool to
reduce test cases from larger programs that are triggering a bug.
+<p>
+
+In addition to extracting the bytecode of the specified function, extract will
+also remove unreachable global variables, prototypes, and unused types.
+<p>
+
+The extract command will read its input from standard input if filename is
+omitted or if filename is -. The output is always written to standard output.
<h3>
OPTIONS