ir_rvalue *
do_assignment(exec_list *instructions, struct _mesa_glsl_parse_state *state,
+ const char *non_lvalue_description,
ir_rvalue *lhs, ir_rvalue *rhs, bool is_initializer,
YYLTYPE lhs_loc)
{
bool error_emitted = (lhs->type->is_error() || rhs->type->is_error());
if (!error_emitted) {
- if (lhs->variable_referenced() != NULL
- && lhs->variable_referenced()->read_only) {
+ if (non_lvalue_description != NULL) {
+ _mesa_glsl_error(&lhs_loc, state,
+ "assignment to %s",
+ non_lvalue_description);
+ error_emitted = true;
+ } else if (lhs->variable_referenced() != NULL
+ && lhs->variable_referenced()->read_only) {
_mesa_glsl_error(&lhs_loc, state,
"assignment to read-only variable '%s'",
lhs->variable_referenced()->name);
instructions->push_tail(new(ctx) ir_assignment(new(ctx) ir_dereference_variable(var),
lvalue, NULL));
- /* Once we've created this temporary, mark it read only so it's no
- * longer considered an lvalue.
- */
- var->read_only = true;
-
return new(ctx) ir_dereference_variable(var);
}
op[0] = this->subexpressions[0]->hir(instructions, state);
op[1] = this->subexpressions[1]->hir(instructions, state);
- result = do_assignment(instructions, state, op[0], op[1], false,
+ result = do_assignment(instructions, state,
+ this->subexpressions[0]->non_lvalue_description,
+ op[0], op[1], false,
this->subexpressions[0]->get_location());
error_emitted = result->type->is_error();
break;
error_emitted = true;
}
- type = op[0]->type;
+ type = error_emitted ? glsl_type::error_type : op[0]->type;
result = new(ctx) ir_expression(ir_unop_bit_not, type, op[0], NULL);
break;
op[0], op[1]);
result = do_assignment(instructions, state,
+ this->subexpressions[0]->non_lvalue_description,
op[0]->clone(ctx, NULL), temp_rhs, false,
this->subexpressions[0]->get_location());
error_emitted = (op[0]->type->is_error());
op[0], op[1]);
result = do_assignment(instructions, state,
+ this->subexpressions[0]->non_lvalue_description,
op[0]->clone(ctx, NULL), temp_rhs, false,
this->subexpressions[0]->get_location());
error_emitted = type->is_error();
&loc);
ir_rvalue *temp_rhs = new(ctx) ir_expression(operations[this->oper],
type, op[0], op[1]);
- result = do_assignment(instructions, state, op[0]->clone(ctx, NULL),
- temp_rhs, false,
+ result = do_assignment(instructions, state,
+ this->subexpressions[0]->non_lvalue_description,
+ op[0]->clone(ctx, NULL), temp_rhs, false,
this->subexpressions[0]->get_location());
error_emitted = op[0]->type->is_error() || op[1]->type->is_error();
break;
state, &loc);
ir_rvalue *temp_rhs = new(ctx) ir_expression(operations[this->oper],
type, op[0], op[1]);
- result = do_assignment(instructions, state, op[0]->clone(ctx, NULL),
- temp_rhs, false,
+ result = do_assignment(instructions, state,
+ this->subexpressions[0]->non_lvalue_description,
+ op[0]->clone(ctx, NULL), temp_rhs, false,
this->subexpressions[0]->get_location());
error_emitted = op[0]->type->is_error() || op[1]->type->is_error();
break;
case ast_pre_inc:
case ast_pre_dec: {
+ this->non_lvalue_description = (this->oper == ast_pre_inc)
+ ? "pre-increment operation" : "pre-decrement operation";
+
op[0] = this->subexpressions[0]->hir(instructions, state);
op[1] = constant_one_for_inc_dec(ctx, op[0]->type);
op[0], op[1]);
result = do_assignment(instructions, state,
+ this->subexpressions[0]->non_lvalue_description,
op[0]->clone(ctx, NULL), temp_rhs, false,
this->subexpressions[0]->get_location());
error_emitted = op[0]->type->is_error();
case ast_post_inc:
case ast_post_dec: {
+ this->non_lvalue_description = (this->oper == ast_post_inc)
+ ? "post-increment operation" : "post-decrement operation";
op[0] = this->subexpressions[0]->hir(instructions, state);
op[1] = constant_one_for_inc_dec(ctx, op[0]->type);
result = get_lvalue_copy(instructions, op[0]->clone(ctx, NULL));
(void)do_assignment(instructions, state,
+ this->subexpressions[0]->non_lvalue_description,
op[0]->clone(ctx, NULL), temp_rhs, false,
this->subexpressions[0]->get_location());
else
var->interpolation = INTERP_QUALIFIER_NONE;
+ if (var->interpolation != INTERP_QUALIFIER_NONE &&
+ !(state->target == vertex_shader && var->mode == ir_var_out) &&
+ !(state->target == fragment_shader && var->mode == ir_var_in)) {
+ const char *qual_string = NULL;
+ switch (var->interpolation) {
+ case INTERP_QUALIFIER_FLAT:
+ qual_string = "flat";
+ break;
+ case INTERP_QUALIFIER_NOPERSPECTIVE:
+ qual_string = "noperspective";
+ break;
+ case INTERP_QUALIFIER_SMOOTH:
+ qual_string = "smooth";
+ break;
+ }
+
+ _mesa_glsl_error(loc, state,
+ "interpolation qualifier `%s' can only be applied to "
+ "vertex shader outputs and fragment shader inputs.",
+ qual_string);
+
+ }
+
var->pixel_center_integer = qual->flags.q.pixel_center_integer;
var->origin_upper_left = qual->flags.q.origin_upper_left;
if ((qual->flags.q.origin_upper_left || qual->flags.q.pixel_center_integer)
* The following extension do not allow the deprecated keywords:
*
* GL_AMD_conservative_depth
+ * GL_ARB_conservative_depth
* GL_ARB_gpu_shader5
* GL_ARB_separate_shader_objects
* GL_ARB_tesselation_shader
+ qual->flags.q.depth_less
+ qual->flags.q.depth_unchanged;
if (depth_layout_count > 0
- && !state->AMD_conservative_depth_enable) {
+ && !state->AMD_conservative_depth_enable
+ && !state->ARB_conservative_depth_enable) {
_mesa_glsl_error(loc, state,
- "extension GL_AMD_conservative_depth must be enabled "
+ "extension GL_AMD_conservative_depth or "
+ "GL_ARB_conservative_depth must be enabled "
"to use depth layout qualifiers");
} else if (depth_layout_count > 0
&& strcmp(var->name, "gl_FragDepth") != 0) {
earlier->interpolation = var->interpolation;
/* Layout qualifiers for gl_FragDepth. */
- } else if (state->AMD_conservative_depth_enable
+ } else if ((state->AMD_conservative_depth_enable ||
+ state->ARB_conservative_depth_enable)
&& strcmp(var->name, "gl_FragDepth") == 0
&& earlier->type == var->type
&& earlier->mode == var->mode) {
const glsl_type *initializer_type;
if (!type->qualifier.flags.q.uniform) {
result = do_assignment(initializer_instructions, state,
+ NULL,
lhs, rhs, true,
type->get_location());
initializer_type = result->type;
case ast_break:
case ast_continue:
- /* FINISHME: Handle switch-statements. They cannot contain 'continue',
- * FINISHME: and they use a different IR instruction for 'break'.
- */
- /* FINISHME: Correctly handle the nesting. If a switch-statement is
- * FINISHME: inside a loop, a 'continue' is valid and will bind to the
- * FINISHME: loop.
- */
- if (state->loop_or_switch_nesting == NULL) {
+ if (mode == ast_continue &&
+ state->loop_nesting_ast == NULL) {
YYLTYPE loc = this->get_location();
_mesa_glsl_error(& loc, state,
- "`%s' may only appear in a loop",
- (mode == ast_break) ? "break" : "continue");
- } else {
- ir_loop *const loop = state->loop_or_switch_nesting->as_loop();
+ "continue may only appear in a loop");
+ } else if (mode == ast_break &&
+ state->loop_nesting_ast == NULL &&
+ state->switch_nesting_ast == NULL) {
+ YYLTYPE loc = this->get_location();
- /* Inline the for loop expression again, since we don't know
- * where near the end of the loop body the normal copy of it
+ _mesa_glsl_error(& loc, state,
+ "break may only appear in a loop or a switch");
+ } else {
+ /* For a loop, inline the for loop expression again,
+ * since we don't know where near the end of
+ * the loop body the normal copy of it
* is going to be placed.
*/
- if (mode == ast_continue &&
- state->loop_or_switch_nesting_ast->rest_expression) {
- state->loop_or_switch_nesting_ast->rest_expression->hir(instructions,
- state);
+ if (state->loop_nesting_ast != NULL &&
+ mode == ast_continue &&
+ state->loop_nesting_ast->rest_expression) {
+ state->loop_nesting_ast->rest_expression->hir(instructions,
+ state);
}
- if (loop != NULL) {
- ir_loop_jump *const jump =
+ if (state->is_switch_innermost &&
+ mode == ast_break) {
+ /* Force break out of switch by setting is_break switch state.
+ */
+ ir_variable *const is_break_var = state->is_break_var;
+ ir_dereference_variable *const deref_is_break_var =
+ new(ctx) ir_dereference_variable(is_break_var);
+ ir_constant *const true_val = new(ctx) ir_constant(true);
+ ir_assignment *const set_break_var =
+ new(ctx) ir_assignment(deref_is_break_var,
+ true_val,
+ NULL);
+
+ instructions->push_tail(set_break_var);
+ }
+ else {
+ ir_loop_jump *const jump =
new(ctx) ir_loop_jump((mode == ast_break)
? ir_loop_jump::jump_break
: ir_loop_jump::jump_continue);
}
+ir_rvalue *
+ast_switch_statement::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ void *ctx = state;
+
+ ir_rvalue *const test_expression =
+ this->test_expression->hir(instructions, state);
+
+ /* From page 66 (page 55 of the PDF) of the GLSL 1.50 spec:
+ *
+ * "The type of init-expression in a switch statement must be a
+ * scalar integer."
+ *
+ * The checks are separated so that higher quality diagnostics can be
+ * generated for cases where the rule is violated.
+ */
+ if (!test_expression->type->is_integer()) {
+ YYLTYPE loc = this->test_expression->get_location();
+
+ _mesa_glsl_error(& loc,
+ state,
+ "switch-statement expression must be scalar "
+ "integer");
+ }
+
+ /* Track the switch-statement nesting in a stack-like manner.
+ */
+ ir_variable *saved_test_var = state->test_var;
+ ir_variable *saved_is_fallthru_var = state->is_fallthru_var;
+
+ bool save_is_switch_innermost = state->is_switch_innermost;
+ ast_switch_statement *saved_nesting_ast = state->switch_nesting_ast;
+
+ state->is_switch_innermost = true;
+ state->switch_nesting_ast = this;
+
+ /* Initalize is_fallthru state to false.
+ */
+ ir_rvalue *const is_fallthru_val = new (ctx) ir_constant(false);
+ state->is_fallthru_var = new(ctx) ir_variable(glsl_type::bool_type,
+ "switch_is_fallthru_tmp",
+ ir_var_temporary);
+ instructions->push_tail(state->is_fallthru_var);
+
+ ir_dereference_variable *deref_is_fallthru_var =
+ new(ctx) ir_dereference_variable(state->is_fallthru_var);
+ instructions->push_tail(new(ctx) ir_assignment(deref_is_fallthru_var,
+ is_fallthru_val,
+ NULL));
+
+ /* Initalize is_break state to false.
+ */
+ ir_rvalue *const is_break_val = new (ctx) ir_constant(false);
+ state->is_break_var = new(ctx) ir_variable(glsl_type::bool_type,
+ "switch_is_break_tmp",
+ ir_var_temporary);
+ instructions->push_tail(state->is_break_var);
+
+ ir_dereference_variable *deref_is_break_var =
+ new(ctx) ir_dereference_variable(state->is_break_var);
+ instructions->push_tail(new(ctx) ir_assignment(deref_is_break_var,
+ is_break_val,
+ NULL));
+
+ /* Cache test expression.
+ */
+ test_to_hir(instructions, state);
+
+ /* Emit code for body of switch stmt.
+ */
+ body->hir(instructions, state);
+
+ /* Restore previous nesting before returning.
+ */
+ state->switch_nesting_ast = saved_nesting_ast;
+ state->is_switch_innermost = save_is_switch_innermost;
+
+ state->test_var = saved_test_var;
+ state->is_fallthru_var = saved_is_fallthru_var;
+
+ /* Switch statements do not have r-values.
+ */
+ return NULL;
+}
+
+
+void
+ast_switch_statement::test_to_hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ void *ctx = state;
+
+ /* Cache value of test expression.
+ */
+ ir_rvalue *const test_val =
+ test_expression->hir(instructions,
+ state);
+
+ state->test_var = new(ctx) ir_variable(glsl_type::int_type,
+ "switch_test_tmp",
+ ir_var_temporary);
+ ir_dereference_variable *deref_test_var =
+ new(ctx) ir_dereference_variable(state->test_var);
+
+ instructions->push_tail(state->test_var);
+ instructions->push_tail(new(ctx) ir_assignment(deref_test_var,
+ test_val,
+ NULL));
+}
+
+
+ir_rvalue *
+ast_switch_body::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ if (stmts != NULL)
+ stmts->hir(instructions, state);
+
+ /* Switch bodies do not have r-values.
+ */
+ return NULL;
+}
+
+
+ir_rvalue *
+ast_case_statement_list::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ foreach_list_typed (ast_case_statement, case_stmt, link, & this->cases)
+ case_stmt->hir(instructions, state);
+
+ /* Case statements do not have r-values.
+ */
+ return NULL;
+}
+
+
+ir_rvalue *
+ast_case_statement::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ labels->hir(instructions, state);
+
+ /* Conditionally set fallthru state based on break state.
+ */
+ ir_constant *const false_val = new(state) ir_constant(false);
+ ir_dereference_variable *const deref_is_fallthru_var =
+ new(state) ir_dereference_variable(state->is_fallthru_var);
+ ir_dereference_variable *const deref_is_break_var =
+ new(state) ir_dereference_variable(state->is_break_var);
+ ir_assignment *const reset_fallthru_on_break =
+ new(state) ir_assignment(deref_is_fallthru_var,
+ false_val,
+ deref_is_break_var);
+ instructions->push_tail(reset_fallthru_on_break);
+
+ /* Guard case statements depending on fallthru state.
+ */
+ ir_dereference_variable *const deref_fallthru_guard =
+ new(state) ir_dereference_variable(state->is_fallthru_var);
+ ir_if *const test_fallthru = new(state) ir_if(deref_fallthru_guard);
+
+ foreach_list_typed (ast_node, stmt, link, & this->stmts)
+ stmt->hir(& test_fallthru->then_instructions, state);
+
+ instructions->push_tail(test_fallthru);
+
+ /* Case statements do not have r-values.
+ */
+ return NULL;
+}
+
+
+ir_rvalue *
+ast_case_label_list::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ foreach_list_typed (ast_case_label, label, link, & this->labels)
+ label->hir(instructions, state);
+
+ /* Case labels do not have r-values.
+ */
+ return NULL;
+}
+
+
+ir_rvalue *
+ast_case_label::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ void *ctx = state;
+
+ ir_dereference_variable *deref_fallthru_var =
+ new(ctx) ir_dereference_variable(state->is_fallthru_var);
+
+ ir_rvalue *const true_val = new(ctx) ir_constant(true);
+
+ /* If not default case, ...
+ */
+ if (this->test_value != NULL) {
+ /* Conditionally set fallthru state based on
+ * comparison of cached test expression value to case label.
+ */
+ ir_rvalue *const test_val = this->test_value->hir(instructions, state);
+
+ ir_dereference_variable *deref_test_var =
+ new(ctx) ir_dereference_variable(state->test_var);
+
+ ir_rvalue *const test_cond = new(ctx) ir_expression(ir_binop_all_equal,
+ glsl_type::bool_type,
+ test_val,
+ deref_test_var);
+
+ ir_assignment *set_fallthru_on_test =
+ new(ctx) ir_assignment(deref_fallthru_var,
+ true_val,
+ test_cond);
+
+ instructions->push_tail(set_fallthru_on_test);
+ } else { /* default case */
+ /* Set falltrhu state.
+ */
+ ir_assignment *set_fallthru =
+ new(ctx) ir_assignment(deref_fallthru_var,
+ true_val,
+ NULL);
+
+ instructions->push_tail(set_fallthru);
+ }
+
+ /* Case statements do not have r-values.
+ */
+ return NULL;
+}
+
+
void
ast_iteration_statement::condition_to_hir(ir_loop *stmt,
struct _mesa_glsl_parse_state *state)
ir_loop *const stmt = new(ctx) ir_loop();
instructions->push_tail(stmt);
- /* Track the current loop and / or switch-statement nesting.
+ /* Track the current loop nesting.
*/
- ir_instruction *const nesting = state->loop_or_switch_nesting;
- ast_iteration_statement *nesting_ast = state->loop_or_switch_nesting_ast;
+ ast_iteration_statement *nesting_ast = state->loop_nesting_ast;
+
+ state->loop_nesting_ast = this;
- state->loop_or_switch_nesting = stmt;
- state->loop_or_switch_nesting_ast = this;
+ /* Likewise, indicate that following code is closest to a loop,
+ * NOT closest to a switch.
+ */
+ bool saved_is_switch_innermost = state->is_switch_innermost;
+ state->is_switch_innermost = false;
if (mode != ast_do_while)
condition_to_hir(stmt, state);
/* Restore previous nesting before returning.
*/
- state->loop_or_switch_nesting = nesting;
- state->loop_or_switch_nesting_ast = nesting_ast;
+ state->loop_nesting_ast = nesting_ast;
+ state->is_switch_innermost = saved_is_switch_innermost;
/* Loops do not have r-values.
*/
projects / mesa.git / blobdiff