Using add_unary_arithmetic_expr() instead of hlsl_new_unary_expr()
allows the intrinsic to work with matrices.
Otherwise we get:
E5017: Aborting due to not yet implemented feature: Copying from unsupported node type.
because an HLSL_IR_EXPR reaches split_matrix_copies().
Some intrinsics have different rules for the allowed data types than
expressions:
- Vectors and matrices at the same time are not allowed, regardless of
their dimensions. Even if they have the same number of components.
- Any combination of matrices is always allowed, even those when no
matrix fits inside another, e.g.:
float2x3 is compatible with float3x2, resulting in float 2x2.
The common data type is the min on each dimension.
This is the case for max, pow, ldexp, clamp and smoothstep; which suggest that
it is the case for all intrinsics where the operation is applied element-wise.
Tests for mul() are also added as a counter-example where the operation
is not element-wise.
Until vkd3d-shader is patched, an atomic op on a typed buffer where
StorageImageReadWithoutFormat is available will cause SPIR-V validation
failure, and assertion in Mesa debug builds, because the image will be
declared with Unknown format.
Otherwise, for instance, the added test results in:
debug_hlsl_writemask: Assertion `!(writemask & ~VKD3DSP_WRITEMASK_ALL)' failed.
Which happens in allocate_variable_temp_register() when the variable's
type reg_size is <= 4 but its component count is larger, which may
happen if it contains objects.
Do not rely on a draw or dispatch command to do this.
This allows more efficiently testing syntax, in cases where testing the actual
shader functionality is not interesting.
