darkplaces/gmqcc
0
0
Fork 0
mirror of https://github.com/DarkPlacesEngine/gmqcc.git synced 2024-11-23 20:33:05 +00:00
Code Issues Projects Releases Packages Wiki Activity

ast_store_codegen and its l/rvalue handling

Browse source
This commit is contained in:
Wolfgang (Blub) Bumiller 2012-05-02 20:36:11 +02:00
parent 4fe806edc2
commit 75c60657ac
1 changed files with 26 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
ast.c
View file

@ -487,8 +487,32 @@ bool ast_block_codegen(ast_block *self, ast_function *func, bool lvalue, ir_valu
bool ast_store_codegen(ast_store *self, ast_function *func, bool lvalue, ir_value **out)
{
/* NOTE: remember: destination codegen needs to have lvalue=true */
ast_expression_codegen *cgen;
ir_value *left, *right;
cgen = self->dest->expression.codegen;
/* lvalue! */
if (!(*cgen)((ast_expression*)(self->dest), func, true, &left))
return false;
cgen = self->source->expression.codegen;
/* rvalue! */
if (!(*cgen)((ast_expression*)(self->source), func, false, &right))
return false;
if (!ir_block_create_store_op(func->curblock, self->op, left, right))
return false;
/* Theoretically, an assinment returns its left side as an
* lvalue, if we don't need an lvalue though, we return
* the right side as an rvalue, otherwise we have to
* somehow know whether or not we need to dereference the pointer
* on the left side - that is: OP_LOAD if it was an address.
* Also: in original QC we cannot OP_LOADP *anyway*.
*/
*out = (lvalue ? left : right);
return true;
}
bool ast_binary_codegen(ast_binary *self, ast_function *func, bool lvalue, ir_value **out)