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/test/tint/builtins/gen/var/transpose/84a763.wgsl.expected.dxc.hlsl b/test/tint/builtins/gen/var/transpose/84a763.wgsl.expected.dxc.hlsl
new file mode 100644
index 0000000..600c218
--- /dev/null
+++ b/test/tint/builtins/gen/var/transpose/84a763.wgsl.expected.dxc.hlsl
@@ -0,0 +1,30 @@
+void transpose_84a763() {
+  float4x2 res = float4x2((1.0f).xx, (1.0f).xx, (1.0f).xx, (1.0f).xx);
+}
+
+struct tint_symbol {
+  float4 value : SV_Position;
+};
+
+float4 vertex_main_inner() {
+  transpose_84a763();
+  return (0.0f).xxxx;
+}
+
+tint_symbol vertex_main() {
+  const float4 inner_result = vertex_main_inner();
+  tint_symbol wrapper_result = (tint_symbol)0;
+  wrapper_result.value = inner_result;
+  return wrapper_result;
+}
+
+void fragment_main() {
+  transpose_84a763();
+  return;
+}
+
+[numthreads(1, 1, 1)]
+void compute_main() {
+  transpose_84a763();
+  return;
+}