tint: const eval of transpose builtin

Bug: tint:1581
Change-Id: Ia614647bc4a3d24a53d45981ddcdb1c84ea84608
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/111600
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
diff --git a/src/tint/resolver/resolver_test_helper.h b/src/tint/resolver/resolver_test_helper.h
index 57fe14a5..41b08b3 100644
--- a/src/tint/resolver/resolver_test_helper.h
+++ b/src/tint/resolver/resolver_test_helper.h
@@ -151,6 +151,12 @@
 using mat3x2 = mat<3, 2, T>;
 
 template <typename T>
+using mat2x4 = mat<2, 4, T>;
+
+template <typename T>
+using mat4x2 = mat<4, 2, T>;
+
+template <typename T>
 using mat3x3 = mat<3, 3, T>;
 
 template <typename T>