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nir/builder: Add a load_deref_var helper 

Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>
This commit is contained in:
Jason Ekstrand 2016-12-10 11:32:29 -08:00
parent 13a2f20740
commit 75a6707984
1 changed files with 16 additions and 0 deletions
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16
src/compiler/nir/nir_builder.h
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@ -411,6 +411,22 @@ nir_load_var(nir_builder *build, nir_variable *var)
return &load->dest.ssa;
}
static inline nir_ssa_def *
nir_load_deref_var(nir_builder *build, nir_deref_var *deref)
{
const struct glsl_type *type = nir_deref_tail(&deref->deref)->type;
const unsigned num_components = glsl_get_vector_elements(type);
nir_intrinsic_instr *load =
nir_intrinsic_instr_create(build->shader, nir_intrinsic_load_var);
load->num_components = num_components;
load->variables[0] = nir_deref_var_clone(deref, load);
nir_ssa_dest_init(&load->instr, &load->dest, num_components,
glsl_get_bit_size(type), NULL);
nir_builder_instr_insert(build, &load->instr);
return &load->dest.ssa;
}
static inline void
nir_store_var(nir_builder *build, nir_variable *var, nir_ssa_def *value,
unsigned writemask)