Jason pointed out that variable dereferences in NIR are really part of
their parent instruction, and should have the same lifetime.
Unlike in GLSL IR, they're not used very often - just for intrinsic
variables, call parameters & return, and indirect samplers for
texturing. Also, nir_deref_var is the top-level concept, and
nir_deref_array/nir_deref_record are child nodes.
This patch attempts to allocate nir_deref_vars out of their parent
instruction, and any sub-dereferences out of their parent deref.
It enforces these restrictions in the validator as well.
This means that freeing an instruction should free its associated
dereference chain as well. The memory sweeper pass can also happily
ignore them.
v2: Rename make_deref to evaluate_deref and make it take a nir_instr *
instead of void *. This involves adding &instr->instr everywhere.
(Requested by Jason Ekstrand.)
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
These are nir_cf_nodes, not ALU instructions.
Also, use unreachable() to preempt said review feedback.
v2: Do it right (thanks Ilia).
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
We never did a single hash table lookup in the entire NIR code base that I
found so there was no real benifit to doing it that way. I suppose that
for linking, we'll probably want to be able to lookup by name but we can
leave building that hash table to the linker. In the mean time this was
causing problems with GLSL IR -> NIR because GLSL IR doesn't guarantee us
unique names of uniforms, etc. This was causing massive rendering isues in
the unreal4 Sun Temple demo.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Previously, the set API required the user to do all of the hashing of keys
as it passed them in. Since the hashing function is intrinsically tied to
the comparison function, it makes sense for the hash set to know about
it. Also, it makes for a somewhat clumsy API as the user is constantly
calling hashing functions many of which have long names. This is
especially bad when the standard call looks something like
_mesa_set_add(ht, _mesa_pointer_hash(key), key);
In the above case, there is no reason why the hash set shouldn't do the
hashing for you. We leave the option for you to do your own hashing if
it's more efficient, but it's no longer needed. Also, if you do do your
own hashing, the hash set will assert that your hash matches what it
expects out of the hashing function. This should make it harder to mess up
your hashing.
This is analygous to 94303a0750 where we did this for hash_table
Signed-off-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This solves a number of problems. First is the ability to change the
number of sources that a texture instruction has. Second, it solves the
delema that may occur if a texture instruction has more than 4 sources.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
As it was, we weren't ever using load_const in a non-SSA way. This allows
us to substantially simplify the load_const instruction. If we ever need a
non-SSA constant load, we can do a load_const and an imov.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
We stopped generating predicates in glsl_to_nir some time ago. Right now,
it's all dead untested code that I'm not convinced always worked in the
first place. If we decide we want them back, we can revert this patch.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
This commit renames nir_instr_as_texture to nir_instr_as_tex and renames
nir_instr_type_texture to nir_instr_type_tex to be consistent with
nir_tex_instr.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
We used to have the number of components built into the intrinsic. This
meant that all of our load/store intrinsics had vec1, vec2, vec3, and vec4
variants. This lead to piles of switch statements to generate the correct
intrinsic names, and introspection to figure out the number of components.
We can make things much nicer by allowing "vectorized" intrinsics.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Previously, we used a string name. It was nice for translating out of GLSL
IR (which also does that) but cumbersome the rest of the time.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
