diff options
Diffstat (limited to 'src/glsl/ast_to_hir.cpp')
| -rw-r--r-- | src/glsl/ast_to_hir.cpp | 497 |
1 files changed, 244 insertions, 253 deletions
diff --git a/src/glsl/ast_to_hir.cpp b/src/glsl/ast_to_hir.cpp index cde7052b051..25ccdab27c0 100644 --- a/src/glsl/ast_to_hir.cpp +++ b/src/glsl/ast_to_hir.cpp @@ -3405,7 +3405,7 @@ ast_jump_statement::hir(exec_list *instructions, "continue may only appear in a loop"); } else if (mode == ast_break && state->loop_nesting_ast == NULL && - state->switch_nesting_ast == NULL) { + state->switch_state.switch_nesting_ast == NULL) { YYLTYPE loc = this->get_location(); _mesa_glsl_error(& loc, state, @@ -3423,11 +3423,11 @@ ast_jump_statement::hir(exec_list *instructions, state); } - if (state->is_switch_innermost && + if (state->switch_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_variable *const is_break_var = state->switch_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); @@ -3530,25 +3530,22 @@ ast_switch_statement::hir(exec_list *instructions, /* 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; + struct glsl_switch_state saved = state->switch_state; - state->is_switch_innermost = true; - state->switch_nesting_ast = this; + state->switch_state.is_switch_innermost = true; + state->switch_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); + state->switch_state.is_fallthru_var = + new(ctx) ir_variable(glsl_type::bool_type, + "switch_is_fallthru_tmp", + ir_var_temporary); + instructions->push_tail(state->switch_state.is_fallthru_var); ir_dereference_variable *deref_is_fallthru_var = - new(ctx) ir_dereference_variable(state->is_fallthru_var); + new(ctx) ir_dereference_variable(state->switch_state.is_fallthru_var); instructions->push_tail(new(ctx) ir_assignment(deref_is_fallthru_var, is_fallthru_val, NULL)); @@ -3556,13 +3553,13 @@ ast_switch_statement::hir(exec_list *instructions, /* 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); + state->switch_state.is_break_var = new(ctx) ir_variable(glsl_type::bool_type, + "switch_is_break_tmp", + ir_var_temporary); + instructions->push_tail(state->switch_state.is_break_var); ir_dereference_variable *deref_is_break_var = - new(ctx) ir_dereference_variable(state->is_break_var); + new(ctx) ir_dereference_variable(state->switch_state.is_break_var); instructions->push_tail(new(ctx) ir_assignment(deref_is_break_var, is_break_val, NULL)); @@ -3575,254 +3572,248 @@ ast_switch_statement::hir(exec_list *instructions, */ 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; -} - + state->switch_state = saved; -ir_rvalue * -ast_case_label::hir(exec_list *instructions, - struct _mesa_glsl_parse_state *state) -{ - void *ctx = state; + /* Switch statements do not have r-values. + */ + return NULL; + } - 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); + void + ast_switch_statement::test_to_hir(exec_list *instructions, + struct _mesa_glsl_parse_state *state) + { + void *ctx = state; - ir_dereference_variable *deref_test_var = - new(ctx) ir_dereference_variable(state->test_var); + /* Cache value of test expression. + */ + ir_rvalue *const test_val = + test_expression->hir(instructions, + state); - ir_rvalue *const test_cond = new(ctx) ir_expression(ir_binop_all_equal, - glsl_type::bool_type, - test_val, - deref_test_var); + state->switch_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->switch_state.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; -} + instructions->push_tail(state->switch_state.test_var); + instructions->push_tail(new(ctx) ir_assignment(deref_test_var, + test_val, + NULL)); + } -void -ast_iteration_statement::condition_to_hir(ir_loop *stmt, - struct _mesa_glsl_parse_state *state) -{ - void *ctx = state; + ir_rvalue * + ast_switch_body::hir(exec_list *instructions, + struct _mesa_glsl_parse_state *state) + { + if (stmts != NULL) + stmts->hir(instructions, state); - if (condition != NULL) { - ir_rvalue *const cond = - condition->hir(& stmt->body_instructions, state); + /* Switch bodies do not have r-values. + */ + return NULL; + } - if ((cond == NULL) - || !cond->type->is_boolean() || !cond->type->is_scalar()) { - YYLTYPE loc = condition->get_location(); - _mesa_glsl_error(& loc, state, - "loop condition must be scalar boolean"); - } else { - /* As the first code in the loop body, generate a block that looks - * like 'if (!condition) break;' as the loop termination condition. - */ - ir_rvalue *const not_cond = - new(ctx) ir_expression(ir_unop_logic_not, glsl_type::bool_type, cond, - 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); - ir_if *const if_stmt = new(ctx) ir_if(not_cond); + /* Case statements do not have r-values. + */ + return NULL; + } - ir_jump *const break_stmt = - new(ctx) ir_loop_jump(ir_loop_jump::jump_break); - if_stmt->then_instructions.push_tail(break_stmt); - stmt->body_instructions.push_tail(if_stmt); - } - } -} - - -ir_rvalue * -ast_iteration_statement::hir(exec_list *instructions, - struct _mesa_glsl_parse_state *state) -{ - void *ctx = state; - - /* For-loops and while-loops start a new scope, but do-while loops do not. - */ - if (mode != ast_do_while) - state->symbols->push_scope(); - - if (init_statement != NULL) - init_statement->hir(instructions, state); - - ir_loop *const stmt = new(ctx) ir_loop(); - instructions->push_tail(stmt); - - /* Track the current loop nesting. - */ - ast_iteration_statement *nesting_ast = state->loop_nesting_ast; - - state->loop_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); - - if (body != NULL) - body->hir(& stmt->body_instructions, state); - - if (rest_expression != NULL) - rest_expression->hir(& stmt->body_instructions, state); - - if (mode == ast_do_while) - condition_to_hir(stmt, state); - - if (mode != ast_do_while) - state->symbols->pop_scope(); + 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->switch_state.is_fallthru_var); + ir_dereference_variable *const deref_is_break_var = + new(state) ir_dereference_variable(state->switch_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->switch_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->switch_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->switch_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) + { + void *ctx = state; + + if (condition != NULL) { + ir_rvalue *const cond = + condition->hir(& stmt->body_instructions, state); + + if ((cond == NULL) + || !cond->type->is_boolean() || !cond->type->is_scalar()) { + YYLTYPE loc = condition->get_location(); + + _mesa_glsl_error(& loc, state, + "loop condition must be scalar boolean"); + } else { + /* As the first code in the loop body, generate a block that looks + * like 'if (!condition) break;' as the loop termination condition. + */ + ir_rvalue *const not_cond = + new(ctx) ir_expression(ir_unop_logic_not, glsl_type::bool_type, cond, + NULL); + + ir_if *const if_stmt = new(ctx) ir_if(not_cond); - /* Restore previous nesting before returning. - */ - state->loop_nesting_ast = nesting_ast; - state->is_switch_innermost = saved_is_switch_innermost; + ir_jump *const break_stmt = + new(ctx) ir_loop_jump(ir_loop_jump::jump_break); + + if_stmt->then_instructions.push_tail(break_stmt); + stmt->body_instructions.push_tail(if_stmt); + } + } + } + + + ir_rvalue * + ast_iteration_statement::hir(exec_list *instructions, + struct _mesa_glsl_parse_state *state) + { + void *ctx = state; + + /* For-loops and while-loops start a new scope, but do-while loops do not. + */ + if (mode != ast_do_while) + state->symbols->push_scope(); + + if (init_statement != NULL) + init_statement->hir(instructions, state); + + ir_loop *const stmt = new(ctx) ir_loop(); + instructions->push_tail(stmt); + + /* Track the current loop nesting. + */ + ast_iteration_statement *nesting_ast = state->loop_nesting_ast; + + state->loop_nesting_ast = this; + + /* Likewise, indicate that following code is closest to a loop, + * NOT closest to a switch. + */ + bool saved_is_switch_innermost = state->switch_state.is_switch_innermost; + state->switch_state.is_switch_innermost = false; + + if (mode != ast_do_while) + condition_to_hir(stmt, state); + + if (body != NULL) + body->hir(& stmt->body_instructions, state); + + if (rest_expression != NULL) + rest_expression->hir(& stmt->body_instructions, state); + + if (mode == ast_do_while) + condition_to_hir(stmt, state); + + if (mode != ast_do_while) + state->symbols->pop_scope(); + + /* Restore previous nesting before returning. + */ + state->loop_nesting_ast = nesting_ast; + state->switch_state.is_switch_innermost = saved_is_switch_innermost; /* Loops do not have r-values. */ |