Vendor import of llvm trunk r161861:

http://llvm.org/svn/llvm-project/llvm/trunk@161861

1 files changed, 104 insertions, 0 deletions

diff --git a/docs/CommandGuide/llvm-extract.rst b/docs/CommandGuide/llvm-extract.rst
new file mode 100644
index 0000000..d569e35
--- /dev/null
+++ b/docs/CommandGuide/llvm-extract.rst
@@ -0,0 +1,104 @@
+llvm-extract - extract a function from an LLVM module
+=====================================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-extract** [*options*] **--func** *function-name* [*filename*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-extract** command takes the name of a function and extracts it from
+the specified LLVM bitcode file.  It is primarily used as a debugging tool to
+reduce test cases from larger programs that are triggering a bug.
+
+In addition to extracting the bitcode of the specified function,
+**llvm-extract** will also remove unreachable global variables, prototypes, and
+unused types.
+
+The **llvm-extract** command reads its input from standard input if filename is
+omitted or if filename is -.  The output is always written to standard output,
+unless the **-o** option is specified (see below).
+
+
+OPTIONS
+-------
+
+
+
+**-f**
+
+ Enable binary output on terminals.  Normally, **llvm-extract** will refuse to
+ write raw bitcode output if the output stream is a terminal. With this option,
+ **llvm-extract** will write raw bitcode regardless of the output device.
+
+
+
+**--func** *function-name*
+
+ Extract the function named *function-name* from the LLVM bitcode. May be
+ specified multiple times to extract multiple functions at once.
+
+
+
+**--rfunc** *function-regular-expr*
+
+ Extract the function(s) matching *function-regular-expr* from the LLVM bitcode.
+ All functions matching the regular expression will be extracted.  May be
+ specified multiple times.
+
+
+
+**--glob** *global-name*
+
+ Extract the global variable named *global-name* from the LLVM bitcode. May be
+ specified multiple times to extract multiple global variables at once.
+
+
+
+**--rglob** *glob-regular-expr*
+
+ Extract the global variable(s) matching *global-regular-expr* from the LLVM
+ bitcode. All global variables matching the regular expression will be extracted.
+ May be specified multiple times.
+
+
+
+**-help**
+
+ Print a summary of command line options.
+
+
+
+**-o** *filename*
+
+ Specify the output filename.  If filename is "-" (the default), then
+ **llvm-extract** sends its output to standard output.
+
+
+
+**-S**
+
+ Write output in LLVM intermediate language (instead of bitcode).
+
+
+
+
+EXIT STATUS
+-----------
+
+
+If **llvm-extract** succeeds, it will exit with 0.  Otherwise, if an error
+occurs, it will exit with a non-zero value.
+
+
+SEE ALSO
+--------
+
+
+bugpoint|bugpoint