[llvm] d3bcbd6 - [Docs] Fix concat vectors (#131860)

[via llvm-commits]

Author: john-stuart2
Date: 2025-03-19T00:22:57+07:00
New Revision: d3bcbd6b32bfee6e924397e704fcf2a94659af6b

URL: https://github.com/llvm/llvm-project/commit/d3bcbd6b32bfee6e924397e704fcf2a94659af6b
DIFF: https://github.com/llvm/llvm-project/commit/d3bcbd6b32bfee6e924397e704fcf2a94659af6b.diff

LOG: [Docs] Fix concat vectors (#131860)

GenericOpcodes.td states that the number of operands are variadic.

let InOperandList = (ins type1:$src0, variable_ops);

X86 supports up to 4 inputs. The example uses 512-bit aka AVX-512 to
make it look real and show the effect of the ~many operands.

Test plan: ninja docs-llvm-html

Added: 
    

Modified: 
    llvm/docs/GlobalISel/GenericOpcode.rst

Removed: 
    


################################################################################
diff  --git a/llvm/docs/GlobalISel/GenericOpcode.rst b/llvm/docs/GlobalISel/GenericOpcode.rst
index 8b76a407c34f8..c5aa437f40bf1 100644
--- a/llvm/docs/GlobalISel/GenericOpcode.rst
+++ b/llvm/docs/GlobalISel/GenericOpcode.rst
@@ -725,7 +725,13 @@ Mixing scalable vectors and fixed vectors are not allowed.
 G_CONCAT_VECTORS
 ^^^^^^^^^^^^^^^^
 
-Concatenate two vectors to form a longer vector.
+Concatenate vectors to form a longer vector.
+
+.. code-block:: none
+
+  %4:_(<16 x i32>) = G_CONCAT_VECTORS %0:_(<4 x i32>), %1:_(<4 x i32>),
+                                      %2:_(<4 x i32>), %3:_(<4 x i32>)
+
 
 G_BUILD_VECTOR, G_BUILD_VECTOR_TRUNC
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^