[PATCH 04/17] bad-goto: do not linearize if the IR will be invalid

[Luc Van Oostenryck <luc.vanoostenryck@gmail.com>]

In some error cases, it's not possible to produce a valid &
correct IR for the concerned function. For exemple, if the
AST contains invalid gotos, the CFG will either be invalid
or won't correspond to the erroneous source code.

So, refuse to linearize such functions.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 linearize.c | 2 +-
 symbol.h    | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/linearize.c b/linearize.c
index b040d345d469..222714564a3f 100644
--- a/linearize.c
+++ b/linearize.c
@@ -2480,7 +2480,7 @@ static struct entrypoint *linearize_fn(struct symbol *sym, struct symbol *base_t
 	pseudo_t result;
 	int i;
 
-	if (!stmt)
+	if (!stmt || base_type->bogus_linear)
 		return NULL;
 
 	ep = alloc_entrypoint();
diff --git a/symbol.h b/symbol.h
index c86dfb335e29..de13d60b8b75 100644
--- a/symbol.h
+++ b/symbol.h
@@ -171,6 +171,7 @@ struct symbol {
 			unsigned long	offset;
 			int		bit_size;
 			unsigned int	bit_offset:8,
+					bogus_linear:1,
 					variadic:1,
 					initialized:1,
 					examined:1,
-- 
2.26.0