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nir/builder: constant-fold nir_mov_alu() if requested

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This commit is contained in:
Daniel Schürmann 2026-04-29 19:29:51 +02:00
parent a8c7a25fb1
commit 82501c380c
1 changed files with 11 additions and 0 deletions
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11
src/compiler/nir/nir_builder.h
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@ -718,6 +718,17 @@ nir_mov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
return src.src.ssa;
}
if (build->constant_fold_alu && nir_src_is_const(src.src)) {
nir_const_value dest[NIR_MAX_VEC_COMPONENTS];
nir_load_const_instr *load_const = nir_src_as_load_const(src.src);
for (unsigned i = 0; i < num_components; i++)
dest[i] = load_const->value[src.swizzle[i]];
return nir_build_imm(build, num_components,
nir_src_bit_size(src.src),
dest);
}
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_mov);
nir_def_init(&mov->instr, &mov->def, num_components,
nir_src_bit_size(src.src));