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spirv: Add a vtn_decorate_pointer helper

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This helper makes a duplicate copy of the pointer if any new access
flags are set at this stage.  This way we don't end up propagating
access flags further than they actual SPIR-V decorations.  In several
instances where we create new pointers, we still call the decoration
helper directly because no copy is needed.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
This commit is contained in:
Jason Ekstrand 2019-11-04 16:44:30 -06:00
parent 4f9688e571
commit 9cc4c2c916
1 changed files with 41 additions and 26 deletions
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67
src/compiler/spirv/vtn_variables.c
View file

@ -30,18 +30,49 @@
#include "nir_deref.h"
#include <vulkan/vulkan_core.h>
static void ptr_decoration_cb(struct vtn_builder *b,
struct vtn_value *val, int member,
const struct vtn_decoration *dec,
void *void_ptr);
static void
ptr_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
const struct vtn_decoration *dec, void *void_ptr)
{
struct vtn_pointer *ptr = void_ptr;
switch (dec->decoration) {
case SpvDecorationNonUniformEXT:
ptr->access |= ACCESS_NON_UNIFORM;
break;
default:
break;
}
}
static struct vtn_pointer*
vtn_decorate_pointer(struct vtn_builder *b, struct vtn_value *val,
struct vtn_pointer *ptr)
{
struct vtn_pointer dummy = { };
vtn_foreach_decoration(b, val, ptr_decoration_cb, &dummy);
/* If we're adding access flags, make a copy of the pointer. We could
* probably just OR them in without doing so but this prevents us from
* leaking them any further than actually specified in the SPIR-V.
*/
if (dummy.access & ~ptr->access) {
struct vtn_pointer *copy = ralloc(b, struct vtn_pointer);
*copy = *ptr;
copy->access |= dummy.access;
return copy;
}
return ptr;
}
struct vtn_value *
vtn_push_value_pointer(struct vtn_builder *b, uint32_t value_id,
struct vtn_pointer *ptr)
{
struct vtn_value *val = vtn_push_value(b, value_id, vtn_value_type_pointer);
val->pointer = ptr;
vtn_foreach_decoration(b, val, ptr_decoration_cb, ptr);
val->pointer = vtn_decorate_pointer(b, val, ptr);
return val;
}
@ -1753,22 +1784,6 @@ var_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
}
}
static void
ptr_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
const struct vtn_decoration *dec, void *void_ptr)
{
struct vtn_pointer *ptr = void_ptr;
switch (dec->decoration) {
case SpvDecorationNonUniformEXT:
ptr->access |= ACCESS_NON_UNIFORM;
break;
default:
break;
}
}
enum vtn_variable_mode
vtn_storage_class_to_mode(struct vtn_builder *b,
SpvStorageClass class,
@ -2493,10 +2508,10 @@ vtn_handle_variables(struct vtn_builder *b, SpvOp opcode,
val->sampled_image->image =
vtn_pointer_dereference(b, base_val->sampled_image->image, chain);
val->sampled_image->sampler = base_val->sampled_image->sampler;
vtn_foreach_decoration(b, val, ptr_decoration_cb,
val->sampled_image->image);
vtn_foreach_decoration(b, val, ptr_decoration_cb,
val->sampled_image->sampler);
val->sampled_image->image =
vtn_decorate_pointer(b, val, val->sampled_image->image);
val->sampled_image->sampler =
vtn_decorate_pointer(b, val, val->sampled_image->sampler);
} else {
vtn_assert(base_val->value_type == vtn_value_type_pointer);
struct vtn_pointer *ptr =