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glsl: generate named interface block names correctly 

Firstly this updates the named interface lowering pass to store the
interface without the arrays removed.

Note we need to remove the arrays in the interface/varying matching
code to not regress things but in future this should be fixed
futher as it would seem we currently successfully match interface
blocks with differnt array sizes.

Since we now know if the interface was an array we can reduce the
IR flags from_named_ifc_block_array and from_named_ifc_block_nonarray
to just from_named_ifc_block.

Next rather than having a different code path for named interface
blocks in program_resource_visitor we just make use of the one used
by UBOs this allows us to now handle arrays of arrays correctly.

Finally we add a new param to the recursion function
named_ifc_member this is because we only want to process a single
member at a time. Note that this is also the glsl_struct_field
from the original ifc type before lowering rather than the type
from the lowered variable. This fixes a bug in Mesa where we would
generate the names like WithInstArray[0].g[0][0] when it should be
WithInstArray[0].g[0] for the following interface.

   out WithInstArray {
      float g[3];
   } instArray[2];

Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Timothy Arceri 2016-03-11 16:15:02 +11:00
parent 7ebc3deaad
commit 8765a9e0fe
6 changed files with 38 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/compiler/glsl/ir.h
View File

@ -742,21 +742,9 @@ public:
/**
* Non-zero if this variable was created by lowering a named interface
* block which was not an array.
*
* Note that this variable and \c from_named_ifc_block_array will never
* both be non-zero.
* block.
*/
unsigned from_named_ifc_block_nonarray:1;
/**
* Non-zero if this variable was created by lowering a named interface
* block which was an array.
*
* Note that this variable and \c from_named_ifc_block_nonarray will never
* both be non-zero.
*/
unsigned from_named_ifc_block_array:1;
unsigned from_named_ifc_block:1;
/**
* Non-zero if the variable must be a shader input. This is useful for

6
src/compiler/glsl/link_interface_blocks.cpp
View File

@ -242,7 +242,8 @@ public:
return entry ? (ir_variable *) entry->data : NULL;
} else {
const struct hash_entry *entry =
_mesa_hash_table_search(ht, var->get_interface_type()->name);
_mesa_hash_table_search(ht,
var->get_interface_type()->without_array()->name);
return entry ? (ir_variable *) entry->data : NULL;
}
}
@ -263,7 +264,8 @@ public:
snprintf(location_str, 11, "%d", var->data.location);
_mesa_hash_table_insert(ht, ralloc_strdup(mem_ctx, location_str), var);
} else {
_mesa_hash_table_insert(ht, var->get_interface_type()->name, var);
_mesa_hash_table_insert(ht,
var->get_interface_type()->without_array()->name, var);
}
}

95
src/compiler/glsl/link_uniforms.cpp
View File

@ -68,7 +68,7 @@ program_resource_visitor::process(const glsl_type *type, const char *name)
unsigned packing = type->interface_packing;
recursion(type, &name_copy, strlen(name), false, NULL, packing, false,
record_array_count);
record_array_count, NULL);
ralloc_free(name_copy);
}
@ -76,8 +76,6 @@ void
program_resource_visitor::process(ir_variable *var)
{
unsigned record_array_count = 1;
const glsl_type *t = var->type;
const glsl_type *t_without_array = var->type->without_array();
const bool row_major =
var->data.matrix_layout == GLSL_MATRIX_LAYOUT_ROW_MAJOR;
@ -85,80 +83,28 @@ program_resource_visitor::process(ir_variable *var)
var->get_interface_type()->interface_packing :
var->type->interface_packing;
const glsl_type *t =
var->data.from_named_ifc_block ? var->get_interface_type() : var->type;
const glsl_type *t_without_array = t->without_array();
/* false is always passed for the row_major parameter to the other
* processing functions because no information is available to do
* otherwise. See the warning in linker.h.
*/
/* Only strdup the name if we actually will need to modify it. */
if (var->data.from_named_ifc_block_array) {
/* lower_named_interface_blocks created this variable by lowering an
* interface block array to an array variable. For example if the
* original source code was:
*
* out Blk { vec4 bar } foo[3];
*
* Then the variable is now:
*
* out vec4 bar[3];
*
* We need to visit each array element using the names constructed like
* so:
*
* Blk[0].bar
* Blk[1].bar
* Blk[2].bar
*/
assert(t->is_array());
const glsl_type *ifc_type = var->get_interface_type();
char *name = ralloc_strdup(NULL, ifc_type->name);
size_t name_length = strlen(name);
for (unsigned i = 0; i < t->length; i++) {
size_t new_length = name_length;
ralloc_asprintf_rewrite_tail(&name, &new_length, "[%u].%s", i,
var->name);
/* Note: row_major is only meaningful for uniform blocks, and
* lowering is only applied to non-uniform interface blocks, so we
* can safely pass false for row_major.
*/
recursion(var->type, &name, new_length, row_major, NULL, packing,
false, record_array_count);
}
ralloc_free(name);
} else if (var->data.from_named_ifc_block_nonarray) {
/* lower_named_interface_blocks created this variable by lowering a
* named interface block (non-array) to an ordinary variable. For
* example if the original source code was:
*
* out Blk { vec4 bar } foo;
*
* Then the variable is now:
*
* out vec4 bar;
*
* We need to visit this variable using the name:
*
* Blk.bar
*/
const glsl_type *ifc_type = var->get_interface_type();
char *name = ralloc_asprintf(NULL, "%s.%s", ifc_type->name, var->name);
/* Note: row_major is only meaningful for uniform blocks, and lowering
* is only applied to non-uniform interface blocks, so we can safely
* pass false for row_major.
*/
recursion(var->type, &name, strlen(name), row_major, NULL, packing,
false, record_array_count);
ralloc_free(name);
} else if (t_without_array->is_record() ||
if (t_without_array->is_record() ||
(t->is_array() && t->fields.array->is_array())) {
char *name = ralloc_strdup(NULL, var->name);
recursion(var->type, &name, strlen(name), row_major, NULL, packing,
false, record_array_count);
false, record_array_count, NULL);
ralloc_free(name);
} else if (t_without_array->is_interface()) {
char *name = ralloc_strdup(NULL, t_without_array->name);
recursion(var->type, &name, strlen(name), row_major, NULL, packing,
false, record_array_count);
const glsl_struct_field *ifc_member = var->data.from_named_ifc_block ?
&t_without_array->
fields.structure[t_without_array->field_index(var->name)] : NULL;
recursion(t, &name, strlen(name), row_major, NULL, packing,
false, record_array_count, ifc_member);
ralloc_free(name);
} else {
this->set_record_array_count(record_array_count);
@ -172,7 +118,8 @@ program_resource_visitor::recursion(const glsl_type *t, char **name,
const glsl_type *record_type,
const unsigned packing,
bool last_field,
unsigned record_array_count)
unsigned record_array_count,
const glsl_struct_field *named_ifc_member)
{
/* Records need to have each field processed individually.
*
@ -180,7 +127,12 @@ program_resource_visitor::recursion(const glsl_type *t, char **name,
* individually, then each field of the resulting array elements processed
* individually.
*/
if (t->is_record() || t->is_interface()) {
if (t->is_interface() && named_ifc_member) {
ralloc_asprintf_rewrite_tail(name, &name_length, ".%s",
named_ifc_member->name);
recursion(named_ifc_member->type, name, name_length, row_major, NULL,
packing, false, record_array_count, NULL);
} else if (t->is_record() || t->is_interface()) {
if (record_type == NULL && t->is_record())
record_type = t;
@ -223,7 +175,7 @@ program_resource_visitor::recursion(const glsl_type *t, char **name,
field_row_major,
record_type,
packing,
(i + 1) == t->length, record_array_count);
(i + 1) == t->length, record_array_count, NULL);
/* Only the first leaf-field of the record gets called with the
* record type pointer.
@ -258,7 +210,8 @@ program_resource_visitor::recursion(const glsl_type *t, char **name,
recursion(t->fields.array, name, new_length, row_major,
record_type,
packing,
(i + 1) == t->length, record_array_count);
(i + 1) == t->length, record_array_count,
named_ifc_member);
/* Only the first leaf-field of the record gets called with the
* record type pointer.

8
src/compiler/glsl/link_varyings.cpp
View File

@ -1466,8 +1466,8 @@ populate_consumer_input_sets(void *mem_ctx, exec_list *ir,
} else if (input_var->get_interface_type() != NULL) {
char *const iface_field_name =
ralloc_asprintf(mem_ctx, "%s.%s",
input_var->get_interface_type()->name,
input_var->name);
input_var->get_interface_type()->without_array()->name,
input_var->name);
hash_table_insert(consumer_interface_inputs, input_var,
iface_field_name);
} else {
@ -1498,8 +1498,8 @@ get_matching_input(void *mem_ctx,
} else if (output_var->get_interface_type() != NULL) {
char *const iface_field_name =
ralloc_asprintf(mem_ctx, "%s.%s",
output_var->get_interface_type()->name,
output_var->name);
output_var->get_interface_type()->without_array()->name,
output_var->name);
input_var =
(ir_variable *) hash_table_find(consumer_interface_inputs,
iface_field_name);

3
src/compiler/glsl/linker.h
View File

@ -197,7 +197,8 @@ private:
void recursion(const glsl_type *t, char **name, size_t name_length,
bool row_major, const glsl_type *record_type,
const unsigned packing,
bool last_field, unsigned record_array_count);
bool last_field, unsigned record_array_count,
const glsl_struct_field *named_ifc_member);
};
void

5
src/compiler/glsl/lower_named_interface_blocks.cpp
View File

@ -169,7 +169,6 @@ flatten_named_interface_blocks_declarations::run(exec_list *instructions)
new(mem_ctx) ir_variable(iface_t->fields.structure[i].type,
var_name,
(ir_variable_mode) var->data.mode);
new_var->data.from_named_ifc_block_nonarray = 1;
} else {
const glsl_type *new_array_type =
process_array_type(var->type, i);
@ -177,7 +176,6 @@ flatten_named_interface_blocks_declarations::run(exec_list *instructions)
new(mem_ctx) ir_variable(new_array_type,
var_name,
(ir_variable_mode) var->data.mode);
new_var->data.from_named_ifc_block_array = 1;
}
new_var->data.location = iface_t->fields.structure[i].location;
new_var->data.explicit_location = (new_var->data.location >= 0);
@ -188,8 +186,9 @@ flatten_named_interface_blocks_declarations::run(exec_list *instructions)
new_var->data.patch = iface_t->fields.structure[i].patch;
new_var->data.stream = var->data.stream;
new_var->data.how_declared = var->data.how_declared;
new_var->data.from_named_ifc_block = 1;
new_var->init_interface_type(iface_t);
new_var->init_interface_type(var->type);
hash_table_insert(interface_namespace, new_var,
iface_field_name);
insert_pos->insert_after(new_var);