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ast_ifthen_codegen

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Wolfgang (Blub) Bumiller 2012-05-03 12:38:43 +02:00
parent 2c329db9b9
commit 54c92d5ae1
1 changed files with 83 additions and 2 deletions
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85
ast.c
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@ -656,8 +656,89 @@ bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, i
bool ast_ifthen_codegen(ast_ifthen *self, ast_function *func, bool lvalue, ir_value **out)
{
if (out) *out = NULL;
return false;
ast_expression_codegen *cgen;
ir_value *condval;
ir_value *dummy;
ir_block *cond = func->curblock;
ir_block *ontrue;
ir_block *onfalse;
ir_block *merge;
/* We don't output any value, thus also don't care about r/lvalue */
(void)out;
(void)lvalue;
/* create blocks first, it's nicer if they're ordered */
if (self->on_true) {
/* create on-true block */
ontrue = ir_function_create_block(func->ir_func, ast_function_label(func));
if (!ontrue)
return false;
} else
ontrue = NULL;
if (self->on_false) {
/* create on-false block */
onfalse = ir_function_create_block(func->ir_func, ast_function_label(func));
if (!onfalse)
return false;
} else
onfalse = NULL;
merge = ir_function_create_block(func->ir_func, ast_function_label(func));
if (!merge)
return NULL;
/* generate the condition */
func->curblock = cond;
cgen = self->cond->expression.codegen;
if (!(*cgen)((ast_expression*)(self->cond), func, false, &condval))
return false;
if (!ir_block_create_if(cond, condval,
(ontrue ? ontrue : merge),
(onfalse ? onfalse : merge)))
{
return false;
}
/* on-true path */
if (ontrue) {
/* enter the block */
func->curblock = ontrue;
/* generate */
cgen = self->on_true->expression.codegen;
if (!(*cgen)((ast_expression*)(self->on_true), func, false, &dummy))
return false;
/* jump to merge block */
if (!ir_block_create_jump(ontrue, merge))
return false;
}
/* on-false path */
if (onfalse) {
/* enter the block */
func->curblock = onfalse;
/* generate */
cgen = self->on_false->expression.codegen;
if (!(*cgen)((ast_expression*)(self->on_false), func, false, &dummy))
return false;
/* jump to merge block */
if (!ir_block_create_jump(ontrue, merge))
return false;
}
/* Now enter the merge block */
func->curblock = merge;
return true;
}
bool ast_ternary_codegen(ast_ternary *self, ast_function *func, bool lvalue, ir_value **out)