Index: docs/MIRLangRef.rst
===================================================================
--- docs/MIRLangRef.rst
+++ docs/MIRLangRef.rst
@@ -378,6 +378,31 @@
 
 .. _registers:
 
+Bundled Instructions
+^^^^^^^^^^^^^^^^^^^^
+
+The syntax for bundled instructions is the following:
+
+.. code-block:: text
+
+    %r0 = IMPLICIT_DEF {
+      %r1 = IMPLICIT_DEF
+      %r2 = IMPLICIT_DEF
+    }
+
+where the first instruction ``%r0 = IMPLICIT_DEF`` is **starting** the bundle,
+but it is **outside** the bundle. The two other instructions are **inside** the
+bundle. The ``}`` ends the bundle.
+
+The following syntax where the first instruction **inside** the bundle is on
+the same line is also accepted:
+
+.. code-block:: text
+
+    %r0 = IMPLICIT_DEF { %r1 = IMPLICIT_DEF
+      %r2 = IMPLICIT_DEF
+    }
+
 Registers
 ---------
 
@@ -743,7 +768,6 @@
 
 .. TODO: Describe the parsers default behaviour when optional YAML attributes
    are missing.
-.. TODO: Describe the syntax for the bundled instructions.
 .. TODO: Describe the syntax for virtual register YAML definitions.
 .. TODO: Describe the machine function's YAML flag attributes.
 .. TODO: Describe the syntax for the register mask machine operands.