Before, we were using foreach_dest and switching on whether the destination
was an SSA value. This works, except not all destinations are SSA values
so we have to special-case ssa_undef instructions. Now that we have a
foreach_ssa_def function, we can iterate over all of the register
destinations in one pass and iterate over the SSA destinations in a second.
This way, if we add other ssa-only instructions, we won't have to worry
about adding them to the special case we have for ssa_undef.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
There are some functions whose destinations are SSA-only and so aren't a
nir_dest. This provides a function that is capable of iterating over the
SSA definitions defined by those functions. If you want registers, you
should use the old iterator.
v2: Kenneth Graunke <kenneth@whitecape.org>:
- Fix nir_foreach_ssa_def's return value.
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>
nir_metadata_dirty was a terrible name because the parameter it takes is
the metadata to be preserved. This is really confusing because it looks
like it's doing the opposite of what it is actually doing. Now it's named
sensibly.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
In particular, we rename nir_tex_src_sampler_index to _sampler_offset and
add a sampler_array_size field to nir_tex_instr. This way we can pass the
size of sampler arrays through to backends even after removing the variable
information and, with it, the type.
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>
Instead, we give SSA definitions a temporary index of 0xFFFFFFFF if the
instruction does not have a block and a proper index when it actually gets
added to the list.
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>
The unlink_blocks function moves successors around to make sure that, if
there is a remaining successor, it is in the first successors slot and not
the second. To fix this, we simply get both successors up front.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Since we don't actually have an "if" instruction, this is a very common
pattern when iterating over instructions. This adds a helper function for
it to make things a little less painful.
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
These include functions for adding and removing various bits of IR and
helpers for iterating over all the sources and destinations of an
instruction. This is similar to ir.cpp.
v2: Jason Ekstrand <jason.ekstrand@intel.com>:
whitespace and automake fixes
