From: Rob Clark Date: Thu, 5 Apr 2018 18:24:33 +0000 (-0400) Subject: nir: convert lower_io_to_scalar to deref instructions X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c6009a1e8ea3b839ac1eef4456e9e0c0f05bf2b2;p=mesa.git nir: convert lower_io_to_scalar to deref instructions Signed-off-by: Rob Clark Acked-by: Rob Clark Acked-by: Bas Nieuwenhuizen Acked-by: Dave Airlie Reviewed-by: Kenneth Graunke --- diff --git a/src/amd/vulkan/radv_pipeline.c b/src/amd/vulkan/radv_pipeline.c index 1609b800208..40c0374d175 100644 --- a/src/amd/vulkan/radv_pipeline.c +++ b/src/amd/vulkan/radv_pipeline.c @@ -2034,8 +2034,6 @@ void radv_create_shaders(struct radv_pipeline *pipeline, nir[i] = nir_shader_clone(NULL, nir[i]); } - NIR_PASS_V(nir[i], nir_lower_deref_instrs, ~0); - if (first != last) { nir_variable_mode mask = 0; @@ -2050,6 +2048,8 @@ void radv_create_shaders(struct radv_pipeline *pipeline, radv_optimize_nir(nir[i], false); } } + + NIR_PASS_V(nir[i], nir_lower_deref_instrs, ~0); } if (nir[MESA_SHADER_TESS_CTRL]) { diff --git a/src/compiler/nir/nir_lower_io_to_scalar.c b/src/compiler/nir/nir_lower_io_to_scalar.c index 0dc135e13b8..8ae54d72947 100644 --- a/src/compiler/nir/nir_lower_io_to_scalar.c +++ b/src/compiler/nir/nir_lower_io_to_scalar.c @@ -23,6 +23,7 @@ #include "nir.h" #include "nir_builder.h" +#include "nir_deref.h" /** @file nir_lower_io_to_scalar.c * @@ -144,28 +145,27 @@ get_channel_variables(struct hash_table *ht, nir_variable *var) } /* - * This function differs from nir_deref_clone() in that it gets its type from - * the parent deref rather than our source deref. This is useful when splitting - * vectors because we want to use the scalar type of the new parent rather than - * then the old vector type. + * Note that the src deref that we are cloning is the head of the + * chain of deref instructions from the original intrinsic, but + * the dst we are cloning to is the tail (because chains of deref + * instructions are created back to front) */ -static nir_deref_array * -clone_deref_array(const nir_deref_array *darr, nir_deref *parent) + +static nir_deref_instr * +clone_deref_array(nir_builder *b, nir_deref_instr *dst_tail, + const nir_deref_instr *src_head) { - nir_deref_array *ndarr = nir_deref_array_create(parent); + const nir_deref_instr *parent = nir_deref_instr_parent(src_head); + + if (!parent) + return dst_tail; - ndarr->deref.type = glsl_get_array_element(parent->type); - if (darr->deref.child) - ndarr->deref.child = - &clone_deref_array(nir_deref_as_array(darr->deref.child), - &ndarr->deref)->deref; + assert(src_head->deref_type == nir_deref_type_array); - ndarr->deref_array_type = darr->deref_array_type; - ndarr->base_offset = darr->base_offset; - if (ndarr->deref_array_type == nir_deref_array_type_indirect) - nir_src_copy(&ndarr->indirect, &darr->indirect, parent); + dst_tail = clone_deref_array(b, dst_tail, parent); - return ndarr; + return nir_build_deref_array(b, dst_tail, + nir_ssa_for_src(b, src_head->arr.index, 1)); } static void @@ -203,17 +203,16 @@ lower_load_to_scalar_early(nir_builder *b, nir_intrinsic_instr *intr, nir_ssa_dest_init(&chan_intr->instr, &chan_intr->dest, 1, intr->dest.ssa.bit_size, NULL); chan_intr->num_components = 1; - chan_intr->variables[0] = nir_deref_var_create(chan_intr, chan_var); - if (intr->variables[0]->deref.child) { - chan_intr->variables[0]->deref.child = - &clone_deref_array(nir_deref_as_array(intr->variables[0]->deref.child), - &chan_intr->variables[0]->deref)->deref; - } + nir_deref_instr *deref = nir_build_deref_var(b, chan_var); + + deref = clone_deref_array(b, deref, nir_src_as_deref(intr->src[0])); + + chan_intr->src[0] = nir_src_for_ssa(&deref->dest.ssa); - if (intr->intrinsic == nir_intrinsic_interp_var_at_offset || - intr->intrinsic == nir_intrinsic_interp_var_at_sample) - nir_src_copy(chan_intr->src, intr->src, &chan_intr->instr); + if (intr->intrinsic == nir_intrinsic_interp_deref_at_offset || + intr->intrinsic == nir_intrinsic_interp_deref_at_sample) + nir_src_copy(&chan_intr->src[1], &intr->src[1], &chan_intr->instr); nir_builder_instr_insert(b, &chan_intr->instr); @@ -235,7 +234,7 @@ lower_store_output_to_scalar_early(nir_builder *b, nir_intrinsic_instr *intr, { b->cursor = nir_before_instr(&intr->instr); - nir_ssa_def *value = nir_ssa_for_src(b, intr->src[0], intr->num_components); + nir_ssa_def *value = nir_ssa_for_src(b, intr->src[1], intr->num_components); nir_variable **chan_vars = get_channel_variables(split_outputs, var); for (unsigned i = 0; i < intr->num_components; i++) { @@ -259,14 +258,12 @@ lower_store_output_to_scalar_early(nir_builder *b, nir_intrinsic_instr *intr, nir_intrinsic_set_write_mask(chan_intr, 0x1); - chan_intr->variables[0] = nir_deref_var_create(chan_intr, chan_var); - chan_intr->src[0] = nir_src_for_ssa(nir_channel(b, value, i)); + nir_deref_instr *deref = nir_build_deref_var(b, chan_var); - if (intr->variables[0]->deref.child) { - chan_intr->variables[0]->deref.child = - &clone_deref_array(nir_deref_as_array(intr->variables[0]->deref.child), - &chan_intr->variables[0]->deref)->deref; - } + deref = clone_deref_array(b, deref, nir_src_as_deref(intr->src[0])); + + chan_intr->src[0] = nir_src_for_ssa(&deref->dest.ssa); + chan_intr->src[1] = nir_src_for_ssa(nir_channel(b, value, i)); nir_builder_instr_insert(b, &chan_intr->instr); } @@ -289,7 +286,7 @@ nir_lower_io_to_scalar_early(nir_shader *shader, nir_variable_mode mask) _mesa_hash_table_create(NULL, _mesa_hash_pointer, _mesa_key_pointer_equal); - nir_assert_lowered_derefs(shader, nir_lower_load_store_derefs | nir_lower_interp_derefs); + nir_assert_unlowered_derefs(shader, nir_lower_load_store_derefs | nir_lower_interp_derefs); nir_foreach_function(function, shader) { if (function->impl) { @@ -306,14 +303,15 @@ nir_lower_io_to_scalar_early(nir_shader *shader, nir_variable_mode mask) if (intr->num_components == 1) continue; - if (intr->intrinsic != nir_intrinsic_load_var && - intr->intrinsic != nir_intrinsic_store_var && - intr->intrinsic != nir_intrinsic_interp_var_at_centroid && - intr->intrinsic != nir_intrinsic_interp_var_at_sample && - intr->intrinsic != nir_intrinsic_interp_var_at_offset) + if (intr->intrinsic != nir_intrinsic_load_deref && + intr->intrinsic != nir_intrinsic_store_deref && + intr->intrinsic != nir_intrinsic_interp_deref_at_centroid && + intr->intrinsic != nir_intrinsic_interp_deref_at_sample && + intr->intrinsic != nir_intrinsic_interp_deref_at_offset) continue; - nir_variable *var = intr->variables[0]->var; + nir_variable *var = + nir_deref_instr_get_variable(nir_src_as_deref(intr->src[0])); nir_variable_mode mode = var->data.mode; /* TODO: add patch support */ @@ -340,16 +338,16 @@ nir_lower_io_to_scalar_early(nir_shader *shader, nir_variable_mode mask) continue; switch (intr->intrinsic) { - case nir_intrinsic_interp_var_at_centroid: - case nir_intrinsic_interp_var_at_sample: - case nir_intrinsic_interp_var_at_offset: - case nir_intrinsic_load_var: + case nir_intrinsic_interp_deref_at_centroid: + case nir_intrinsic_interp_deref_at_sample: + case nir_intrinsic_interp_deref_at_offset: + case nir_intrinsic_load_deref: if ((mask & nir_var_shader_in && mode == nir_var_shader_in) || (mask & nir_var_shader_out && mode == nir_var_shader_out)) lower_load_to_scalar_early(&b, intr, var, split_inputs, split_outputs); break; - case nir_intrinsic_store_var: + case nir_intrinsic_store_deref: if (mask & nir_var_shader_out && mode == nir_var_shader_out) lower_store_output_to_scalar_early(&b, intr, var, @@ -382,4 +380,6 @@ nir_lower_io_to_scalar_early(nir_shader *shader, nir_variable_mode mask) _mesa_hash_table_destroy(split_inputs, NULL); _mesa_hash_table_destroy(split_outputs, NULL); + + nir_remove_dead_derefs(shader); } diff --git a/src/mesa/state_tracker/st_glsl_to_nir.cpp b/src/mesa/state_tracker/st_glsl_to_nir.cpp index e7ef80cd61b..55615728da7 100644 --- a/src/mesa/state_tracker/st_glsl_to_nir.cpp +++ b/src/mesa/state_tracker/st_glsl_to_nir.cpp @@ -674,8 +674,8 @@ st_link_nir(struct gl_context *ctx, mask = (nir_variable_mode)(mask | nir_var_shader_out); nir_shader *nir = shader->Program->nir; - NIR_PASS_V(nir, nir_lower_deref_instrs, (nir_lower_deref_flags)~0); NIR_PASS_V(nir, nir_lower_io_to_scalar_early, mask); + NIR_PASS_V(nir, nir_lower_deref_instrs, (nir_lower_deref_flags)~0); st_nir_opts(nir, is_scalar[i]); }