Document the automatic alias printing of InstAliases.
llvm-svn: 130889
diff --git a/llvm/docs/CodeGenerator.html b/llvm/docs/CodeGenerator.html
index 9185563..60f4260 100644
--- a/llvm/docs/CodeGenerator.html
+++ b/llvm/docs/CodeGenerator.html
@@ -2019,6 +2019,11 @@
<p>Instruction aliases can also have a Requires clause to make them
subtarget specific.</p>
+<p>If the back-end supports it, the instruction printer can automatically emit
+ the alias rather than what's being aliased. It typically leads to better,
+ more readable code. If it's better to print out what's being aliased, then
+ pass a '0' as the third parameter to the InstAlias definition.</p>
+
</div>
</div>