cfg: add missing REPEAT_CFG_CLEANUP

simplify_branch() & insert_branch() convert a conditional branch
into an unconditional one, removing a child which may then
become unreachable.

However, these function doesn't set REPEAT_CFG_CLEANUP and the
unreachable child may not be removed.

Fix this by setting the missing REPEAT_CFG_CLEANUP in these functions.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>

2 files changed, 2 insertions, 1 deletions

diff --git a/linearize.c b/linearize.c
index ab91113d..5d800b7f 100644
--- a/linearize.c
+++ b/linearize.c
@@ -726,6 +726,7 @@ void insert_branch(struct basic_block *bb, struct instruction *jmp, struct basic
 		remove_parent(child, bb);
 	} END_FOR_EACH_PTR(child);
 	PACK_PTR_LIST(&bb->children);
+	repeat_phase |= REPEAT_CFG_CLEANUP;
 }
 	
 
diff --git a/simplify.c b/simplify.c
index e58fb6cf..a0e23d6d 100644
--- a/simplify.c
+++ b/simplify.c
@@ -2048,7 +2048,7 @@ static int simplify_branch(struct instruction *insn)
 		kill_use(&insn->cond);
 		insn->cond = NULL;
 		insn->opcode = OP_BR;
-		return REPEAT_CSE;
+		return REPEAT_CSE|REPEAT_CFG_CLEANUP;
 	}
 
 	/* Conditional on a SETNE $0 or SETEQ $0 */