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compiler/spirv: Add support for non-constant initializers

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This adds support for OpVariable having an initializer that points to
another variable, rather than a constant. In this case, the variable is
initialized to a pointer to the other variable.

Fixes Vulkan CTS tests:
dEQP-VK.spirv_assembly.instruction.compute.variable_init.private.*

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3047>
This commit is contained in:
Arcady Goldmints-Orlov 2019-12-10 15:53:15 -05:00 • committed by Caio Marcelo de Oliveira Filho
parent 7acc81056f
commit e459c7f0a1
1 changed files with 25 additions and 7 deletions
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32
src/compiler/spirv/vtn_variables.c
View file

@ -2155,7 +2155,7 @@ assign_missing_member_locations(struct vtn_variable *var)
static void
vtn_create_variable(struct vtn_builder *b, struct vtn_value *val,
struct vtn_type *ptr_type, SpvStorageClass storage_class,
nir_constant *initializer)
nir_constant *const_initializer, nir_variable *var_initializer)
{
vtn_assert(ptr_type->base_type == vtn_base_type_pointer);
struct vtn_type *type = ptr_type->deref;
@ -2378,10 +2378,14 @@ vtn_create_variable(struct vtn_builder *b, struct vtn_value *val,
unreachable("Should have been caught before");
}
if (initializer) {
/* We can only have one type of initializer */
assert(!(const_initializer && var_initializer));
if (const_initializer) {
var->var->constant_initializer =
nir_constant_clone(initializer, var->var);
nir_constant_clone(const_initializer, var->var);
}
if (var_initializer)
var->var->pointer_initializer = var_initializer;
vtn_foreach_decoration(b, val, var_decoration_cb, var);
vtn_foreach_decoration(b, val, ptr_decoration_cb, val->pointer);
@ -2503,11 +2507,25 @@ vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
struct vtn_value *val = vtn_push_value(b, w[2], vtn_value_type_pointer);
SpvStorageClass storage_class = w[3];
nir_constant *initializer = NULL;
if (count > 4)
initializer = vtn_value(b, w[4], vtn_value_type_constant)->constant;
nir_constant *const_initializer = NULL;
nir_variable *var_initializer = NULL;
if (count > 4) {
struct vtn_value *init = vtn_untyped_value(b, w[4]);
switch (init->value_type) {
case vtn_value_type_constant:
const_initializer = init->constant;
break;
case vtn_value_type_pointer:
var_initializer = init->pointer->var->var;
break;
default:
vtn_fail("SPIR-V variable initializer %u must be constant or pointer",
w[4]);
}
}
vtn_create_variable(b, val, ptr_type, storage_class, const_initializer, var_initializer);
vtn_create_variable(b, val, ptr_type, storage_class, initializer);
break;
}