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ast_return

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This commit is contained in:
Wolfgang Bumiller 2012-07-26 21:18:39 +02:00
parent e22d340e23
commit 31ba1ec6c1
2 changed files with 58 additions and 1 deletions
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41
ast.c
View file

@ -200,6 +200,24 @@ void ast_unary_delete(ast_unary *self)
mem_d(self);
}
ast_return* ast_return_new(lex_ctx ctx, int op,
ast_expression *expr)
{
ast_instantiate(ast_return, ctx, ast_return_delete);
ast_expression_init((ast_expression*)self, (ast_expression_codegen*)&ast_return_codegen);
self->operand = expr;
return self;
}
void ast_return_delete(ast_return *self)
{
ast_unref(self->operand);
ast_expression_delete((ast_expression*)self);
mem_d(self);
}
ast_entfield* ast_entfield_new(lex_ctx ctx, ast_expression *entity, ast_expression *field)
{
const ast_expression *outtype;
@ -785,7 +803,7 @@ bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_valu
if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
return false;
*out = ir_block_create_unary(func->curblock, ast_function_label(func, "bin"),
*out = ir_block_create_unary(func->curblock, ast_function_label(func, "unary"),
self->op, operand);
if (!*out)
return false;
@ -793,6 +811,27 @@ bool ast_unary_codegen(ast_unary *self, ast_function *func, bool lvalue, ir_valu
return true;
}
bool ast_return_codegen(ast_return *self, ast_function *func, bool lvalue, ir_value **out)
{
ast_expression_codegen *cgen;
ir_value *operand;
/* In the context of a return operation, we can disregard
* the lvalue flag.
*/
(void)lvalue;
cgen = self->operand->expression.codegen;
/* lvalue! */
if (!(*cgen)((ast_expression*)(self->operand), func, false, &operand))
return false;
if (!ir_block_create_return(func->curblock, operand))
return false;
return true;
}
bool ast_entfield_codegen(ast_entfield *self, ast_function *func, bool lvalue, ir_value **out)
{
ast_expression_codegen *cgen;

18
ast.h
View file

@ -168,6 +168,24 @@ void ast_unary_delete(ast_unary*);
bool ast_unary_codegen(ast_unary*, ast_function*, bool lvalue, ir_value**);
/* Return
*
* Make sure 'return' only happens at the end of a block, otherwise the IR
* will refuse to create further instructions.
* This should be honored by the parser.
*/
struct ast_return_s
{
ast_expression_common expression;
ast_expression *operand;
};
ast_return* ast_return_new(lex_ctx ctx,
int op,
ast_expression *expr);
void ast_return_delete(ast_return*);
bool ast_return_codegen(ast_return*, ast_function*, bool lvalue, ir_value**);
/* Entity-field
*
* This must do 2 things: