Added information about how llvm-as and llvm-dis select the input and output
filenames.
Corrected some typos in the llvm-dis documentation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8716 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CommandGuide/llvm-as.html b/docs/CommandGuide/llvm-as.html
index e843f85..985c8af 100644
--- a/docs/CommandGuide/llvm-as.html
+++ b/docs/CommandGuide/llvm-as.html
@@ -20,15 +20,39 @@
SYNOPSIS
</h3>
-llvm-as [options] < filename>
+llvm-as [options] [filename]
<h3>
DESCRIPTION
</h3>
-The llvm-as command is the LLVM assembler. It takes a human readable LLVM
-assembly language file and translates it into LLVM bytecode.
+The llvm-as command is the LLVM assembler. It reads a file containing human
+readable LLVM assembly language, translates it to LLVM bytecode, and writes the
+result into a file or to standard output.
+<p>
-By default, llvm-as places its output into filename.bc.
+If filename is omitted or is -, then llvm-as reads its input from standard
+input.
+<p>
+
+If an output file is not specified with the -o option, then llvm-as sends its
+output to a file or standard output by the following logic:
+
+<ul>
+ <li>
+ If the input is standard input, then the output is standard output.
+ <p>
+
+ <li>
+ If the input is a file that ends with .ll, then the output file is of
+ the same name, except that the suffix is changed to .bc.
+ <p>
+
+ <li>
+ If the input is a file that does not end with the .ll suffix, then the
+ output file has the same name as the input file, except that the .bc suffix
+ is appended.
+ <p>
+</ul>
<h3>
OPTIONS
@@ -49,7 +73,8 @@
<li> -o <filename>
<br>
- Specify the output filename.
+ Specify the output filename. If filename is -, then llvm-as sends its
+ output to standard output.
<p>
<li> -stats