Dumps the value associated with each SPIR-V ID after parsing the module.
This will show the intermediate vtn_* values that spirv_to_nir uses.
Only a subset of detailed information is printed at the moment (focus on
pointers and pointer types), but it is easy to add for other value types
later.
Example output when running crucible with the debug option enabled.
```
crucible: start : func.compute.num-workgroups.basic.q0
=== SPIR-V values
1 = extension
2 = type void glsl_type=void
3 = type function
4 = function
5 = block
6 = type scalar glsl_type=uint
7 = type vector glsl_type=uvec3
8 = type array glsl_type=uvec3[]
9 = type struct glsl_type=Storage
10 = type pointer deref=9 SpvStorageClassUniform glsl_type=uvec4
11 = pointer ptr_type=10 (pointed-)type=9
12 = type scalar glsl_type=int
13 = constant type=12
14 = type pointer deref=7 SpvStorageClassInput glsl_type=uint
15 = pointer ptr_type=14 (pointed-)type=7
16 = constant type=6
17 = type pointer deref=6 SpvStorageClassInput glsl_type=uint
18 = pointer ptr_type=17 (pointed-)type=6
NIR: 32 %2 = deref_array &(*%0)[0] (system uint) // &gl_LocalInvocationID[0]
19 = ssa glsl_type=uint
20 = pointer ptr_type=14 (pointed-)type=7
21 = ssa glsl_type=uvec3
22 = type pointer deref=7 SpvStorageClassUniform glsl_type=uint
23 = pointer ptr_type=22 (pointed-)type=7
NIR: 32x4 %12 = deref_array &(*%11)[%4] (ssbo uvec3) // &((Storage *)%9)->uv3a[%4]
24 = constant type=6
25 = constant type=6
26 = constant type=7
===
crucible: pass : func.compute.num-workgroups.basic.q0
```
When the environment variable is set, this dump will also be printed
during vtn_fail and its helpers.
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29295>
Caio Oliveira
e3099fc839