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spirv: Recognize zero initializers in Workgroup variables

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This will be used to implement
VK_KHR_zero_initialize_workgroup_memory.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8708>
This commit is contained in:
Caio Marcelo de Oliveira Filho
2020-06-24 13:44:08 -07:00
committed by Marge Bot
parent 378eca1394
commit c4f2297f00
4 changed files with 26 additions and 0 deletions
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20
src/compiler/spirv/vtn_variables.c
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@@ -1977,6 +1977,26 @@ vtn_create_variable(struct vtn_builder *b, struct vtn_value *val,
}
if (initializer) {
switch (var->mode) {
case vtn_variable_mode_workgroup:
/* VK_KHR_zero_initialize_workgroup_memory. */
vtn_fail_if(b->options->environment != NIR_SPIRV_VULKAN,
"Only Vulkan supports variable initializer "
"for Workgroup variable %u",
vtn_id_for_value(b, val));
vtn_fail_if(initializer->value_type != vtn_value_type_constant ||
!initializer->is_null_constant,
"Workgroup variable %u can only have OpConstantNull "
"as initializer, but have %u instead",
vtn_id_for_value(b, val),
vtn_id_for_value(b, initializer));
b->shader->info.cs.zero_initialize_shared_memory = true;
break;
default:
/* Nothing to check. */
break;
}
switch (initializer->value_type) {
case vtn_value_type_constant:
var->var->constant_initializer =