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nir/opt_shrink_vectors: enable sparse intrinsics shrinking

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Image sparse loads can be stripped from their sparse component if
unused and turned into non sparse variants.

Texture sparse accesses can also be turned off if unused.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23995>
This commit is contained in:
Lionel Landwerlin
2023-07-04 15:06:50 +03:00
committed by Marge Bot
parent c26c0a36d3
commit 0a6dd797ea
1 changed files with 65 additions and 10 deletions
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75
src/compiler/nir/nir_opt_shrink_vectors.c
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@@ -90,6 +90,37 @@ shrink_dest_to_read_mask(nir_ssa_def *def)
return false;
}
static bool
shrink_intrinsic_to_non_sparse(nir_intrinsic_instr *instr)
{
unsigned mask = nir_ssa_def_components_read(&instr->dest.ssa);
int last_bit = util_last_bit(mask);
/* If the sparse component is used, do nothing. */
if (last_bit == instr->dest.ssa.num_components)
return false;
instr->dest.ssa.num_components -= 1;
instr->num_components = instr->dest.ssa.num_components;
/* Switch to the non-sparse intrinsic. */
switch (instr->intrinsic) {
case nir_intrinsic_image_sparse_load:
instr->intrinsic = nir_intrinsic_image_load;
break;
case nir_intrinsic_bindless_image_sparse_load:
instr->intrinsic = nir_intrinsic_bindless_image_load;
break;
case nir_intrinsic_image_deref_sparse_load:
instr->intrinsic = nir_intrinsic_image_deref_load;
break;
default:
break;
}
return true;
}
static void
reswizzle_alu_uses(nir_ssa_def *def, uint8_t *reswizzle)
{
@@ -267,22 +298,43 @@ opt_shrink_vectors_intrinsic(nir_builder *b, nir_intrinsic_instr *instr)
case nir_intrinsic_load_global:
case nir_intrinsic_load_global_constant:
case nir_intrinsic_load_kernel_input:
case nir_intrinsic_load_scratch:
break;
default:
return false;
}
case nir_intrinsic_load_scratch: {
/* Must be a vectorized intrinsic that we can resize. */
assert(instr->num_components != 0);
/* Must be a vectorized intrinsic that we can resize. */
assert(instr->num_components != 0);
/* Trim the dest to the used channels */
if (!shrink_dest_to_read_mask(&instr->dest.ssa))
return false;
/* Trim the dest to the used channels */
if (shrink_dest_to_read_mask(&instr->dest.ssa)) {
instr->num_components = instr->dest.ssa.num_components;
return true;
}
case nir_intrinsic_image_sparse_load:
case nir_intrinsic_bindless_image_sparse_load:
case nir_intrinsic_image_deref_sparse_load:
return shrink_intrinsic_to_non_sparse(instr);
default:
return false;
}
}
return false;
static bool
opt_shrink_vectors_tex(nir_builder *b, nir_tex_instr *tex)
{
if (!tex->is_sparse)
return false;
unsigned mask = nir_ssa_def_components_read(&tex->dest.ssa);
int last_bit = util_last_bit(mask);
/* If the sparse component is used, do nothing. */
if (last_bit == tex->dest.ssa.num_components)
return false;
tex->dest.ssa.num_components -= 1;
tex->is_sparse = false;
return true;
}
static bool
@@ -455,6 +507,9 @@ opt_shrink_vectors_instr(nir_builder *b, nir_instr *instr)
case nir_instr_type_alu:
return opt_shrink_vectors_alu(b, nir_instr_as_alu(instr));
case nir_instr_type_tex:
return opt_shrink_vectors_tex(b, nir_instr_as_tex(instr));
case nir_instr_type_intrinsic:
return opt_shrink_vectors_intrinsic(b, nir_instr_as_intrinsic(instr));