Ben Clayton 7103f51603 writer/msl: Fix swizzling on packed vectors
Metal 1.x does not support swizzling on packed_vec types.
Use array-index for single element selection (permitted on LHS and RHS of assignment)
Cast the packed_vec to a vec for multiple element swizzles (not permitted as the LHS of an assignment).

Fixed: tint:1249
Change-Id: I70cbb0c22a935b06b3905d24484bdc2edfb95fc2
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/67060
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
2021-10-20 16:12:33 +00:00

14 lines
147 B
WebGPU Shading Language

struct S {
v: vec3<u32>;
};
var<private> P : S;
fn f() {
P.v = vec3<u32>(1u, 2u, 3u);
P.v.x = 1u;
P.v.y = 2u;
P.v.z = 3u;
}