[llvm] [Docs] Add more vector examples (PR #131887)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-globalisel

Author: None (john-stuart2)

<details>
<summary>Changes</summary>

The order of parameters is derived from GenericOpcodes.td. I wanted to keep the examples separate from the fix.

---
Full diff: https://github.com/llvm/llvm-project/pull/131887.diff


1 Files Affected:

- (modified) llvm/docs/GlobalISel/GenericOpcode.rst (+18) 


``````````diff
diff --git a/llvm/docs/GlobalISel/GenericOpcode.rst b/llvm/docs/GlobalISel/GenericOpcode.rst
index c5aa437f40bf1..5291b42d80870 100644
--- a/llvm/docs/GlobalISel/GenericOpcode.rst
+++ b/llvm/docs/GlobalISel/GenericOpcode.rst
@@ -743,16 +743,34 @@ same as all source operands)
 The _TRUNC version truncates the larger operand types to fit the
 destination vector elt type.
 
+.. code-block:: none
+
+  %4:_(<4 x i32>) = G_BUILD_VECTOR %0:_(i32), %1:_(i32), %2:_(i32), %3:_(i32)
+
+  %4:_(<4 x i32>) = G_BUILD_VECTOR_TRUNC %0:_(i64), %1:_(i64), %2:_(i64), %3:_(i64)
+
+
 G_INSERT_VECTOR_ELT
 ^^^^^^^^^^^^^^^^^^^
 
 Insert an element into a vector
 
+.. code-block:: none
+
+  %4:_(<16 x i32>) = G_INSERT_VECTOR_ELT %vec:_(<16 x i32>), %elt:_(i32), %idx:_(s64)
+
+
+
 G_EXTRACT_VECTOR_ELT
 ^^^^^^^^^^^^^^^^^^^^
 
 Extract an element from a vector
 
+.. code-block:: none
+
+  %elt:_(i32) = G_EXTRACT_VECTOR_ELT %vec:_(<16 x i32>), %idx:_(s64)
+
+
 G_SHUFFLE_VECTOR
 ^^^^^^^^^^^^^^^^
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/131887