diff options
Diffstat (limited to 'linearize.c')
| -rw-r--r-- | linearize.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/linearize.c b/linearize.c index 30ed2a30..b040d345 100644 --- a/linearize.c +++ b/linearize.c @@ -183,6 +183,7 @@ static const char *opcodes[] = { [OP_BR] = "br", [OP_CBR] = "cbr", [OP_SWITCH] = "switch", + [OP_UNREACH] = "unreachable", [OP_COMPUTEDGOTO] = "jmp *", /* Binary */ @@ -399,6 +400,8 @@ const char *show_instruction(struct instruction *insn) } END_FOR_EACH_PTR(jmp); break; } + case OP_UNREACH: + break; case OP_PHISOURCE: { struct instruction *phi; @@ -654,6 +657,13 @@ static void add_one_insn(struct entrypoint *ep, struct instruction *insn) } } +static void add_unreachable(struct entrypoint *ep) +{ + struct instruction *insn = alloc_instruction(OP_UNREACH, 0); + add_one_insn(ep, insn); + ep->active = NULL; +} + static void set_activeblock(struct entrypoint *ep, struct basic_block *bb) { if (!bb_terminated(ep->active)) @@ -1499,6 +1509,11 @@ static pseudo_t linearize_call_expression(struct entrypoint *ep, struct expressi fn = expr->fn; fntype = fn->ctype; + + // handle builtins + if (fntype->op && fntype->op->linearize) + return fntype->op->linearize(ep, expr); + ctype = &fntype->ctype; if (fntype->type == SYM_NODE) fntype = fntype->ctype.base_type; @@ -1548,6 +1563,9 @@ static pseudo_t linearize_call_expression(struct entrypoint *ep, struct expressi add_one_insn(ep, insn); } } END_FOR_EACH_PTR(context); + + if (ctype->modifiers & MOD_NORETURN) + add_unreachable(ep); } return retval; @@ -2513,3 +2531,37 @@ struct entrypoint *linearize_symbol(struct symbol *sym) return linearize_fn(sym, base_type); return NULL; } + +/* + * Builtin functions + */ + +static pseudo_t linearize_unreachable(struct entrypoint *ep, struct expression *exp) +{ + add_unreachable(ep); + return VOID; +} + +static struct sym_init { + const char *name; + pseudo_t (*linearize)(struct entrypoint *, struct expression*); + struct symbol_op op; +} builtins_table[] = { + // must be declared in builtin.c:declare_builtins[] + { "__builtin_unreachable", linearize_unreachable }, + { } +}; + +void init_linearized_builtins(int stream) +{ + struct sym_init *ptr; + + for (ptr = builtins_table; ptr->name; ptr++) { + struct symbol *sym; + sym = create_symbol(stream, ptr->name, SYM_NODE, NS_SYMBOL); + if (!sym->op) + sym->op = &ptr->op; + sym->op->type |= KW_BUILTIN; + ptr->op.linearize = ptr->linearize; + } +} |