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asahi: Use nir_builder_at more

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24258>
This commit is contained in:
Alyssa Rosenzweig 2023-07-04 22:24:28 -04:00 • committed by Marge Bot
parent c20c9f06d3
commit f10d51541d
1 changed files with 4 additions and 9 deletions
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13
src/asahi/lib/agx_nir_lower_alpha.c
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@ -20,9 +20,6 @@ agx_nir_lower_alpha_to_coverage(nir_shader *shader, uint8_t nr_samples)
nir_function_impl *impl = nir_shader_get_entrypoint(shader);
nir_block *block = nir_impl_last_block(impl);
nir_builder _b = nir_builder_create(impl);
nir_builder *b = &_b;
/* The store is probably at the end of the block, so search in reverse. */
nir_intrinsic_instr *store = NULL;
nir_foreach_instr_reverse(instr, block) {
@ -55,7 +52,8 @@ agx_nir_lower_alpha_to_coverage(nir_shader *shader, uint8_t nr_samples)
if (rgba->num_components < 4)
return;
b->cursor = nir_before_instr(&store->instr);
nir_builder _b = nir_builder_at(nir_before_instr(&store->instr));
nir_builder *b = &_b;
/* Calculate a coverage mask (alpha * nr_samples) bits set. The way we do
* this isn't particularly clever:
@ -85,9 +83,6 @@ agx_nir_lower_alpha_to_one(nir_shader *shader)
nir_function_impl *impl = nir_shader_get_entrypoint(shader);
nir_block *block = nir_impl_last_block(impl);
nir_builder _b = nir_builder_create(impl);
nir_builder *b = &_b;
nir_foreach_instr(instr, block) {
if (instr->type != nir_instr_type_intrinsic)
continue;
@ -111,9 +106,9 @@ agx_nir_lower_alpha_to_one(nir_shader *shader)
if (rgba->num_components < 4)
continue;
b->cursor = nir_before_instr(instr);
nir_builder b = nir_builder_at(nir_before_instr(instr));
nir_ssa_def *rgb1 = nir_vector_insert_imm(
b, rgba, nir_imm_floatN_t(b, 1.0, rgba->bit_size), 3);
&b, rgba, nir_imm_floatN_t(&b, 1.0, rgba->bit_size), 3);
nir_instr_rewrite_src_ssa(instr, &intr->src[0], rgb1);
}