add a new Blob encoding abbreviation for bitcode files that emits
elements in a form that is efficient for the reader to just get a
pointer in memory and start reading. APIs to do efficient reading
and writing are still todo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68465 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/BitCodeFormat.html b/docs/BitCodeFormat.html
index 8a53f27..54b9361 100644
--- a/docs/BitCodeFormat.html
+++ b/docs/BitCodeFormat.html
@@ -478,6 +478,13 @@
<li value="4">Char6: This field should be emitted as
a <a href="#char6">char6-encoded value</a>. This operand type takes no
extra data.</li>
+<li value="5">Blob: This field is emitted as a vbr6, followed by padding to a
+ 32-bit boundary (for alignment) and an array of 8-bit objects. The array of
+ bytes is further followed by tail padding to ensure that its total length is
+ a multiple of 4 bytes. This makes it very efficient for the reader to
+ decode the data without having to make a copy of it: it can use a pointer to
+ the data in the mapped in file and poke directly at it. A blob may only
+ occur as the last operand of an abbreviation.</li>
</ol>
<p>