Load https://webgpu.github.io/webgpu-samples/samples/rotatingCube

WGSL source: 0.5 * (position + vec4(1.0, 1.0, 1.0, 1.0));

Actual generated metal: local2.fragPosition = 0.5 * local1 + vec<float, 4>(1, 1, 1, 1);

Expected generated metal: local2.fragPosition = 0.5 * (local1 + vec<float, 4>(1, 1, 1, 1));