mirror of
https://github.com/DarkPlacesEngine/gmqcc.git
synced 2024-11-27 06:02:22 +00:00
Some side-effect propagation for better warnings, so that comma-operators with assignments in them don't cause the -Weffectless-statement warning, and fixing ternary precedence for fte operator list
This commit is contained in:
Wolfgang (Blub) Bumiller
parent
63d89f9f5a
commit
ca033e5acd
4 changed files with 83 additions and 28 deletions
57
ast.c
57
ast.c
|
|
@ -35,6 +35,7 @@
|
|||
ast_node_init((ast_node*)self, ctx, TYPE_##T); \
|
||||
( (ast_node*)self )->node.destroy = (ast_node_delete*)destroyfn
|
||||
|
||||
|
||||
/* error handling */
|
||||
static void asterror(lex_ctx ctx, const char *msg, ...)
|
||||
{
|
||||
|
|
@ -59,8 +60,17 @@ static void ast_node_init(ast_node *self, lex_ctx ctx, int nodetype)
|
|||
self->node.destroy = &_ast_node_destroy;
|
||||
self->node.keep = false;
|
||||
self->node.nodetype = nodetype;
|
||||
self->node.side_effects = false;
|
||||
}
|
||||
|
||||
/* weight and side effects */
|
||||
static void _ast_propagate_effects(ast_node *self, ast_node *other)
|
||||
{
|
||||
if (ast_side_effects(other))
|
||||
ast_side_effects(self) = true;
|
||||
}
|
||||
#define ast_propagate_effects(s,o) _ast_propagate_effects(((ast_node*)(s)), ((ast_node*)(o)))
|
||||
|
||||
/* General expression initialization */
|
||||
static void ast_expression_init(ast_expression *self,
|
||||
ast_expression_codegen *codegen)
|
||||
|
|
@ -385,6 +395,9 @@ ast_binary* ast_binary_new(lex_ctx ctx, int op,
|
|||
self->left = left;
|
||||
self->right = right;
|
||||
|
||||
ast_propagate_effects(self, left);
|
||||
ast_propagate_effects(self, right);
|
||||
|
||||
if (op >= INSTR_EQ_F && op <= INSTR_GT)
|
||||
self->expression.vtype = TYPE_FLOAT;
|
||||
else if (op == INSTR_AND || op == INSTR_OR ||
|
||||
|
|
@ -414,6 +427,8 @@ ast_binstore* ast_binstore_new(lex_ctx ctx, int storop, int op,
|
|||
ast_instantiate(ast_binstore, ctx, ast_binstore_delete);
|
||||
ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_binstore_codegen);
|
||||
|
||||
ast_side_effects(self) = true;
|
||||
|
||||
self->opstore = storop;
|
||||
self->opbin = op;
|
||||
self->dest = left;
|
||||
|
|
@ -450,6 +465,8 @@ ast_unary* ast_unary_new(lex_ctx ctx, int op,
|
|||
self->op = op;
|
||||
self->operand = expr;
|
||||
|
||||
ast_propagate_effects(self, expr);
|
||||
|
||||
if (op >= INSTR_NOT_F && op <= INSTR_NOT_FNC) {
|
||||
self->expression.vtype = TYPE_FLOAT;
|
||||
} else
|
||||
|
|
@ -472,6 +489,9 @@ ast_return* ast_return_new(lex_ctx ctx, ast_expression *expr)
|
|||
|
||||
self->operand = expr;
|
||||
|
||||
if (expr)
|
||||
ast_propagate_effects(self, expr);
|
||||
|
||||
return self;
|
||||
}
|
||||
|
||||
|
|
@ -506,6 +526,8 @@ ast_entfield* ast_entfield_new_force(lex_ctx ctx, ast_expression *entity, ast_ex
|
|||
|
||||
self->entity = entity;
|
||||
self->field = field;
|
||||
ast_propagate_effects(self, entity);
|
||||
ast_propagate_effects(self, field);
|
||||
|
||||
if (!ast_type_adopt(self, outtype)) {
|
||||
ast_entfield_delete(self);
|
||||
|
|
@ -550,6 +572,8 @@ ast_member* ast_member_new(lex_ctx ctx, ast_expression *owner, unsigned int fiel
|
|||
}
|
||||
|
||||
self->owner = owner;
|
||||
ast_propagate_effects(self, owner);
|
||||
|
||||
self->field = field;
|
||||
if (name)
|
||||
self->name = util_strdup(name);
|
||||
|
|
@ -589,6 +613,8 @@ ast_array_index* ast_array_index_new(lex_ctx ctx, ast_expression *array, ast_exp
|
|||
|
||||
self->array = array;
|
||||
self->index = index;
|
||||
ast_propagate_effects(self, array);
|
||||
ast_propagate_effects(self, index);
|
||||
|
||||
if (!ast_type_adopt(self, outtype)) {
|
||||
ast_array_index_delete(self);
|
||||
|
|
@ -628,6 +654,11 @@ ast_ifthen* ast_ifthen_new(lex_ctx ctx, ast_expression *cond, ast_expression *on
|
|||
self->cond = cond;
|
||||
self->on_true = ontrue;
|
||||
self->on_false = onfalse;
|
||||
ast_propagate_effects(self, cond);
|
||||
if (ontrue)
|
||||
ast_propagate_effects(self, ontrue);
|
||||
if (onfalse)
|
||||
ast_propagate_effects(self, onfalse);
|
||||
|
||||
return self;
|
||||
}
|
||||
|
|
@ -656,6 +687,9 @@ ast_ternary* ast_ternary_new(lex_ctx ctx, ast_expression *cond, ast_expression *
|
|||
self->cond = cond;
|
||||
self->on_true = ontrue;
|
||||
self->on_false = onfalse;
|
||||
ast_propagate_effects(self, cond);
|
||||
ast_propagate_effects(self, ontrue);
|
||||
ast_propagate_effects(self, onfalse);
|
||||
|
||||
if (!ast_type_adopt(self, ontrue)) {
|
||||
ast_ternary_delete(self);
|
||||
|
|
@ -690,6 +724,17 @@ ast_loop* ast_loop_new(lex_ctx ctx,
|
|||
self->increment = increment;
|
||||
self->body = body;
|
||||
|
||||
if (initexpr)
|
||||
ast_propagate_effects(self, initexpr);
|
||||
if (precond)
|
||||
ast_propagate_effects(self, precond);
|
||||
if (postcond)
|
||||
ast_propagate_effects(self, postcond);
|
||||
if (increment)
|
||||
ast_propagate_effects(self, increment);
|
||||
if (body)
|
||||
ast_propagate_effects(self, body);
|
||||
|
||||
return self;
|
||||
}
|
||||
|
||||
|
|
@ -733,6 +778,8 @@ ast_switch* ast_switch_new(lex_ctx ctx, ast_expression *op)
|
|||
self->operand = op;
|
||||
self->cases = NULL;
|
||||
|
||||
ast_propagate_effects(self, op);
|
||||
|
||||
return self;
|
||||
}
|
||||
|
||||
|
|
@ -758,6 +805,8 @@ ast_call* ast_call_new(lex_ctx ctx,
|
|||
ast_instantiate(ast_call, ctx, ast_call_delete);
|
||||
ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_call_codegen);
|
||||
|
||||
ast_side_effects(self) = true;
|
||||
|
||||
self->params = NULL;
|
||||
self->func = funcexpr;
|
||||
|
||||
|
|
@ -812,6 +861,8 @@ ast_store* ast_store_new(lex_ctx ctx, int op,
|
|||
ast_instantiate(ast_store, ctx, ast_store_delete);
|
||||
ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_store_codegen);
|
||||
|
||||
ast_side_effects(self) = true;
|
||||
|
||||
self->op = op;
|
||||
self->dest = dest;
|
||||
self->source = source;
|
||||
|
|
@ -851,6 +902,12 @@ ast_block* ast_block_new(lex_ctx ctx)
|
|||
return self;
|
||||
}
|
||||
|
||||
void ast_block_add_expr(ast_block *self, ast_expression *e)
|
||||
{
|
||||
ast_propagate_effects(self, e);
|
||||
vec_push(self->exprs, e);
|
||||
}
|
||||
|
||||
void ast_block_collect(ast_block *self, ast_expression *expr)
|
||||
{
|
||||
vec_push(self->collect, expr);
|
||||
|
|
|
|||
4
ast.h
4
ast.h
|
|
@ -73,6 +73,7 @@ enum {
|
|||
|
||||
#define ast_istype(x, t) ( ((ast_node_common*)x)->nodetype == (TYPE_##t) )
|
||||
#define ast_ctx(node) (((ast_node_common*)(node))->context)
|
||||
#define ast_side_effects(node) (((ast_node_common*)(node))->side_effects)
|
||||
|
||||
/* Node interface with common components
|
||||
*/
|
||||
|
|
@ -87,6 +88,7 @@ typedef struct
|
|||
* prevents its dtor from destroying this node as well.
|
||||
*/
|
||||
bool keep;
|
||||
bool side_effects;
|
||||
} ast_node_common;
|
||||
|
||||
#define ast_delete(x) ( ( (ast_node*)(x) ) -> node.destroy )((ast_node*)(x))
|
||||
|
|
@ -526,6 +528,8 @@ bool ast_block_set_type(ast_block*, ast_expression *from);
|
|||
bool ast_block_codegen(ast_block*, ast_function*, bool lvalue, ir_value**);
|
||||
void ast_block_collect(ast_block*, ast_expression*);
|
||||
|
||||
void ast_block_add_expr(ast_block*, ast_expression*);
|
||||
|
||||
/* Function
|
||||
*
|
||||
* Contains a list of blocks... at least in theory.
|
||||
|
|
|
|||
8
lexer.h
8
lexer.h
|
|
@ -252,6 +252,9 @@ static const oper_info fte_operators[] = {
|
|||
{ "==", 2, opid2('=','='), ASSOC_LEFT, 10, 0 },
|
||||
{ "!=", 2, opid2('!','='), ASSOC_LEFT, 10, 0 },
|
||||
|
||||
{ "?", 3, opid2('?',':'), ASSOC_RIGHT, 9, 0 },
|
||||
{ ":", 3, opid2(':','?'), ASSOC_RIGHT, 9, 0 },
|
||||
|
||||
{ "=", 2, opid1('='), ASSOC_RIGHT, 8, 0 },
|
||||
{ "+=", 2, opid2('+','='), ASSOC_RIGHT, 8, 0 },
|
||||
{ "-=", 2, opid2('-','='), ASSOC_RIGHT, 8, 0 },
|
||||
|
|
@ -265,10 +268,7 @@ static const oper_info fte_operators[] = {
|
|||
{ "&&", 2, opid2('&','&'), ASSOC_LEFT, 5, 0 },
|
||||
{ "||", 2, opid2('|','|'), ASSOC_LEFT, 5, 0 },
|
||||
|
||||
{ ",", 2, opid1(','), ASSOC_LEFT, 2, 0 },
|
||||
|
||||
{ "?", 3, opid2('?',':'), ASSOC_RIGHT, 1, 0 },
|
||||
{ ":", 3, opid2(':','?'), ASSOC_RIGHT, 1, 0 }
|
||||
{ ",", 2, opid1(','), ASSOC_LEFT, 2, 0 }
|
||||
};
|
||||
static const size_t fte_operator_count = (sizeof(fte_operators) / sizeof(fte_operators[0]));
|
||||
|
||||
|
|
|
|||
42
parser.c
42
parser.c
|
|
@ -575,11 +575,11 @@ static bool parser_sy_pop(parser_t *parser, shunt *sy)
|
|||
|
||||
case opid1(','):
|
||||
if (blocks[0]) {
|
||||
vec_push(blocks[0]->exprs, exprs[1]);
|
||||
ast_block_add_expr(blocks[0], exprs[1]);
|
||||
} else {
|
||||
blocks[0] = ast_block_new(ctx);
|
||||
vec_push(blocks[0]->exprs, exprs[0]);
|
||||
vec_push(blocks[0]->exprs, exprs[1]);
|
||||
ast_block_add_expr(blocks[0], exprs[0]);
|
||||
ast_block_add_expr(blocks[0], exprs[1]);
|
||||
}
|
||||
if (!ast_block_set_type(blocks[0], exprs[1]))
|
||||
return false;
|
||||
|
|
@ -1961,10 +1961,7 @@ static bool parse_for(parser_t *parser, ast_block *block, ast_expression **out)
|
|||
increment = parse_expression_leave(parser, false);
|
||||
if (!increment)
|
||||
goto onerr;
|
||||
if (!ast_istype(increment, ast_store) &&
|
||||
!ast_istype(increment, ast_call) &&
|
||||
!ast_istype(increment, ast_binstore))
|
||||
{
|
||||
if (!ast_side_effects(increment)) {
|
||||
if (genwarning(ast_ctx(increment), WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
|
||||
goto onerr;
|
||||
}
|
||||
|
|
@ -2187,7 +2184,7 @@ static bool parse_switch(parser_t *parser, ast_block *block, ast_expression **ou
|
|||
}
|
||||
if (!expr)
|
||||
continue;
|
||||
vec_push(caseblock->exprs, expr);
|
||||
ast_block_add_expr(caseblock, expr);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -2316,10 +2313,7 @@ static bool parse_statement(parser_t *parser, ast_block *block, ast_expression *
|
|||
if (!exp)
|
||||
return false;
|
||||
*out = exp;
|
||||
if (!ast_istype(exp, ast_store) &&
|
||||
!ast_istype(exp, ast_call) &&
|
||||
!ast_istype(exp, ast_binstore))
|
||||
{
|
||||
if (!ast_side_effects(exp)) {
|
||||
if (genwarning(ast_ctx(exp), WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
|
||||
return false;
|
||||
}
|
||||
|
|
@ -2351,7 +2345,7 @@ static bool parse_block_into(parser_t *parser, ast_block *block, bool warnreturn
|
|||
}
|
||||
if (!expr)
|
||||
continue;
|
||||
vec_push(block->exprs, expr);
|
||||
ast_block_add_expr(block, expr);
|
||||
}
|
||||
|
||||
if (parser->tok != '}') {
|
||||
|
|
@ -2623,9 +2617,9 @@ static bool parse_function_body(parser_t *parser, ast_value *var)
|
|||
if (store_think) ast_delete(store_think);
|
||||
retval = false;
|
||||
}
|
||||
vec_push(block->exprs, (ast_expression*)store_frame);
|
||||
vec_push(block->exprs, (ast_expression*)store_nextthink);
|
||||
vec_push(block->exprs, (ast_expression*)store_think);
|
||||
ast_block_add_expr(block, (ast_expression*)store_frame);
|
||||
ast_block_add_expr(block, (ast_expression*)store_nextthink);
|
||||
ast_block_add_expr(block, (ast_expression*)store_think);
|
||||
}
|
||||
|
||||
if (!retval) {
|
||||
|
|
@ -2774,7 +2768,7 @@ static ast_expression *array_setter_node(parser_t *parser, ast_value *array, ast
|
|||
return NULL;
|
||||
}
|
||||
|
||||
vec_push(block->exprs, (ast_expression*)st);
|
||||
ast_block_add_expr(block, (ast_expression*)st);
|
||||
|
||||
ret = ast_return_new(ctx, NULL);
|
||||
if (!ret) {
|
||||
|
|
@ -2782,7 +2776,7 @@ static ast_expression *array_setter_node(parser_t *parser, ast_value *array, ast
|
|||
return NULL;
|
||||
}
|
||||
|
||||
vec_push(block->exprs, (ast_expression*)ret);
|
||||
ast_block_add_expr(block, (ast_expression*)ret);
|
||||
|
||||
return (ast_expression*)block;
|
||||
} else {
|
||||
|
|
@ -2843,7 +2837,7 @@ static ast_expression *array_field_setter_node(
|
|||
return NULL;
|
||||
}
|
||||
|
||||
vec_push(block->exprs, (ast_expression*)st);
|
||||
ast_block_add_expr(block, (ast_expression*)st);
|
||||
|
||||
ret = ast_return_new(ctx, NULL);
|
||||
if (!ret) {
|
||||
|
|
@ -2851,7 +2845,7 @@ static ast_expression *array_field_setter_node(
|
|||
return NULL;
|
||||
}
|
||||
|
||||
vec_push(block->exprs, (ast_expression*)ret);
|
||||
ast_block_add_expr(block, (ast_expression*)ret);
|
||||
|
||||
return (ast_expression*)block;
|
||||
} else {
|
||||
|
|
@ -2963,7 +2957,7 @@ static bool parser_create_array_setter(parser_t *parser, ast_value *array, const
|
|||
goto cleanup;
|
||||
}
|
||||
|
||||
vec_push(func->blocks[0]->exprs, root);
|
||||
ast_block_add_expr(func->blocks[0], root);
|
||||
array->setter = fval;
|
||||
return true;
|
||||
cleanup:
|
||||
|
|
@ -3012,7 +3006,7 @@ static bool parser_create_array_field_setter(parser_t *parser, ast_value *array,
|
|||
goto cleanup;
|
||||
}
|
||||
|
||||
vec_push(func->blocks[0]->exprs, root);
|
||||
ast_block_add_expr(func->blocks[0], root);
|
||||
array->setter = fval;
|
||||
return true;
|
||||
cleanup:
|
||||
|
|
@ -3059,7 +3053,7 @@ static bool parser_create_array_getter(parser_t *parser, ast_value *array, const
|
|||
goto cleanup;
|
||||
}
|
||||
|
||||
vec_push(func->blocks[0]->exprs, root);
|
||||
ast_block_add_expr(func->blocks[0], root);
|
||||
array->getter = fval;
|
||||
return true;
|
||||
cleanup:
|
||||
|
|
@ -3848,7 +3842,7 @@ skipvar:
|
|||
else {
|
||||
if (vec_size(sy.out) != 1 && vec_size(sy.ops) != 0)
|
||||
parseerror(parser, "internal error: leaked operands");
|
||||
vec_push(localblock->exprs, (ast_expression*)sy.out[0].out);
|
||||
ast_block_add_expr(localblock, (ast_expression*)sy.out[0].out);
|
||||
}
|
||||
vec_free(sy.out);
|
||||
vec_free(sy.ops);
|
||||
|
|
|
|||
Loading…
Reference in a new issue