0*vec3 gets optimized to 0

[LeStahL]

The shader

const vec3 x = 0.*vec3(1.,0.,1.);

gets minified to const vec3 f=0.;, resulting in compiler errors. Expected behavior would be const vec3 f=vec3(0.);.

Interestingly, glslang-validator will validate the output of shader_minifier as correct (?), which makes these kind of issues hard to debug.

Observed on version 1.2.

[laurentlb]

It's the same issue as #2.

I think we could propagate type information to avoid this kind of bug (at least for the simple cases).

[laurentlb]

Closing this issue as I've disabled the 0.*x optimization (#187).

I'll reintroduce it when we have a way to check the type of expressions.