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glsl: move disable_varying_optimizations_for_sso() to NIR linker

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Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22846>
This commit is contained in:
Timothy Arceri
2023-04-05 14:01:34 +10:00
committed by Marge Bot
parent 7cff8d85c0
commit 06f3988c58
2 changed files with 66 additions and 68 deletions
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66
src/compiler/glsl/gl_nir_linker.c
View File

@@ -236,6 +236,69 @@ can_remove_var(nir_variable *var, UNUSED void *data)
return true;
}
static void
set_always_active_io(nir_shader *shader, nir_variable_mode io_mode)
{
assert(io_mode == nir_var_shader_in || io_mode == nir_var_shader_out);
nir_foreach_variable_with_modes(var, shader, io_mode) {
/* Don't set always active on builtins that haven't been redeclared */
if (var->data.how_declared == nir_var_declared_implicitly)
continue;
var->data.always_active_io = true;
}
}
/**
* When separate shader programs are enabled, only input/outputs between
* the stages of a multi-stage separate program can be safely removed
* from the shader interface. Other inputs/outputs must remain active.
*/
static void
disable_varying_optimizations_for_sso(struct gl_shader_program *prog)
{
unsigned first, last;
assert(prog->SeparateShader);
first = MESA_SHADER_STAGES;
last = 0;
/* Determine first and last stage. Excluding the compute stage */
for (unsigned i = 0; i < MESA_SHADER_COMPUTE; i++) {
if (!prog->_LinkedShaders[i])
continue;
if (first == MESA_SHADER_STAGES)
first = i;
last = i;
}
if (first == MESA_SHADER_STAGES)
return;
for (unsigned stage = 0; stage < MESA_SHADER_STAGES; stage++) {
if (!prog->_LinkedShaders[stage])
continue;
/* Prevent the removal of inputs to the first and outputs from the last
* stage, unless they are the initial pipeline inputs or final pipeline
* outputs, respectively.
*
* The removal of IO between shaders in the same program is always
* allowed.
*/
if (stage == first && stage != MESA_SHADER_VERTEX) {
set_always_active_io(prog->_LinkedShaders[stage]->Program->nir,
nir_var_shader_in);
}
if (stage == last && stage != MESA_SHADER_FRAGMENT) {
set_always_active_io(prog->_LinkedShaders[stage]->Program->nir,
nir_var_shader_out);
}
}
}
static bool
inout_has_same_location(const nir_variable *var, unsigned stage)
{
@@ -1239,6 +1302,9 @@ gl_nir_link_glsl(const struct gl_constants *consts,
MESA_TRACE_FUNC();
if (prog->SeparateShader)
disable_varying_optimizations_for_sso(prog);
struct gl_linked_shader *linked_shader[MESA_SHADER_STAGES];
unsigned num_shaders = 0;

68
src/compiler/glsl/linker.cpp
View File

@@ -3447,71 +3447,6 @@ verify_subroutine_associated_funcs(struct gl_shader_program *prog)
}
}
static void
set_always_active_io(exec_list *ir, ir_variable_mode io_mode)
{
assert(io_mode == ir_var_shader_in || io_mode == ir_var_shader_out);
foreach_in_list(ir_instruction, node, ir) {
ir_variable *const var = node->as_variable();
if (var == NULL || var->data.mode != io_mode)
continue;
/* Don't set always active on builtins that haven't been redeclared */
if (var->data.how_declared == ir_var_declared_implicitly)
continue;
var->data.always_active_io = true;
}
}
/**
* When separate shader programs are enabled, only input/outputs between
* the stages of a multi-stage separate program can be safely removed
* from the shader interface. Other inputs/outputs must remain active.
*/
static void
disable_varying_optimizations_for_sso(struct gl_shader_program *prog)
{
unsigned first, last;
assert(prog->SeparateShader);
first = MESA_SHADER_STAGES;
last = 0;
/* Determine first and last stage. Excluding the compute stage */
for (unsigned i = 0; i < MESA_SHADER_COMPUTE; i++) {
if (!prog->_LinkedShaders[i])
continue;
if (first == MESA_SHADER_STAGES)
first = i;
last = i;
}
if (first == MESA_SHADER_STAGES)
return;
for (unsigned stage = 0; stage < MESA_SHADER_STAGES; stage++) {
gl_linked_shader *sh = prog->_LinkedShaders[stage];
if (!sh)
continue;
/* Prevent the removal of inputs to the first and outputs from the last
* stage, unless they are the initial pipeline inputs or final pipeline
* outputs, respectively.
*
* The removal of IO between shaders in the same program is always
* allowed.
*/
if (stage == first && stage != MESA_SHADER_VERTEX)
set_always_active_io(sh->ir, ir_var_shader_in);
if (stage == last && stage != MESA_SHADER_FRAGMENT)
set_always_active_io(sh->ir, ir_var_shader_out);
}
}
static bool
link_varyings(const struct gl_constants *consts, struct gl_shader_program *prog,
void *mem_ctx)
@@ -3827,9 +3762,6 @@ link_shaders(struct gl_context *ctx, struct gl_shader_program *prog)
}
}
if (prog->SeparateShader)
disable_varying_optimizations_for_sso(prog);
/* Process UBOs */
if (!interstage_cross_validate_uniform_blocks(prog, false))
goto done;