Unnecessary autoscheduler warnings

[SanderVocke]

It seems that in almost any algorithm, the autoscheduler will generate a bunch of of user warnings like:

Warning:
Outer dim vectorization of var "_0" in function "convolved$10.update(0)"
Warning:
Outer dim vectorization of var "_0" in function "convolved$7.update(0)"
Warning:
Outer dim vectorization of var "_0" in function "convolved$5.update(0)"
Warning:
Outer dim vectorization of var "_0" in function "convolved$3.update(0)"
Warning:
Outer dim vectorization of var "_0" in function "convolved.update(0)"

And also these:

Warning:
Insufficient parallelism for gauss_kernel_normalized
Warning:
Insufficient parallelism for gauss_kernel_normalized$1
Warning:
Insufficient parallelism for gauss_kernel_normalized$10
Warning:
Insufficient parallelism for gauss_kernel_normalized$12
Warning:
Insufficient parallelism for gauss_kernel_normalized$2
Warning:
Insufficient parallelism for gauss_kernel_normalized$3
Warning:
Insufficient parallelism for gauss_kernel_normalized$4

In a Halide-heavy codebase they kind of drown the build log. I don't think they are particularly useful for the user, as there is no way to "generate more parallelism" or steer the autoscheduler to not vectorize outer dimensions. So to me they only look useful for developers working on the autoscheduler, not users of it.

Could they be debug messages instead, at a suitable debug level?