fix documentation

clang/include/clang/Basic/AttrDocs.td

@@ -7344,7 +7344,7 @@ where shaders must be compiled into a library and linked at runtime.
 
 def HLSLLoopHintDocs : Documentation {
   let Category = DocCatStmt;
-  let Heading = "#[loop]";
+  let Heading = "[loop]";
   let Content = [{
 The ``[loop]`` directive allows loop optimization hints to be
 specified for the subsequent loop. The directive allows unrolling to
@@ -7360,15 +7360,28 @@ unroller to not unroll the loop.
     ...
   }
 
-See `hlsl loop extensions
-<https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-for>`_
+.. code-block:: hlsl
+
+  [loop]
+  while (...) {
+    ...
+  }
+
+.. code-block:: hlsl
+
+  [loop]
+  do {
+    ...
+  } while (...)
+
+See `hlsl loop extensions <https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-for>`_
 for details.
   }];
 }
 
 def HLSLUnrollHintDocs : Documentation {
   let Category = DocCatStmt;
-  let Heading = "[unroll(x)]";
+  let Heading = "[unroll(x)], [unroll]";
   let Content = [{
 Loop unrolling optimization hints can be specified with ``[unroll(x)]``
 . The attribute is placed immediately before a for, while,
@@ -7382,9 +7395,43 @@ unroller to unroll the loop ``_value_`` times. Note: [unroll(x)] is not compatib
   for (...) {
     ...
   }
-See
-`hlsl loop extensions
-<https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-for>`_
+
+.. code-block:: hlsl
+
+  [unroll]
+  for (...) {
+    ...
+  }
+
+.. code-block:: hlsl
+
+  [unroll(4)]
+  while (...) {
+    ...
+  }
+
+.. code-block:: hlsl
+
+  [unroll]
+  while (...) {
+    ...
+  }
+
+.. code-block:: hlsl
+
+  [unroll(4)]
+  do {
+    ...
+  } while (...)
+
+.. code-block:: hlsl
+
+  [unroll]
+  do {
+    ...
+  } while (...)
+
+See `hlsl loop extensions <https://learn.microsoft.com/en-us/windows/win32/direct3dhlsl/dx-graphics-hlsl-for>`_
 for details.
   }];
 }
@@ -7448,7 +7495,8 @@ b for constant buffer views (CBV).
 
 Register space is specified in the format ``space[number]`` and defaults to ``space0`` if omitted.
 Here're resource binding examples with and without space:
-.. code-block:: c++
+
+.. code-block:: hlsl
 
   RWBuffer<float> Uav : register(u3, space1);
   Buffer<float> Buf : register(t1);
@@ -7466,7 +7514,7 @@ A subcomponent is a register number, which is an integer. A component is in the
 
 Examples:
 
-.. code-block:: c++
+.. code-block:: hlsl
 
   cbuffer A {
     float3 a : packoffset(c0.y);