[PATCH] recursive phi_defines cannot happen

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

The function phi_defines() does the liveness tracking of phi-pseudos
(pseudos in OP_PHIs args). While doing this, the function is
recursively called when the pseudo would be defined by another phi-node;
but this condition is impossible because all phi-pseudos are defined
by OP_PHISOURCE instructions.

This patch remove the recursive call and its associated test.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 liveness.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/liveness.c b/liveness.c
index eeff0f79..fb696720 100644
--- a/liveness.c
+++ b/liveness.c
@@ -23,10 +23,6 @@ static void phi_defines(struct instruction * phi_node, pseudo_t target,
 		def = phi->def;
 		if (!def || !def->bb)
 			continue;
-		if (def->opcode == OP_PHI) {
-			phi_defines(def, target, defines);
-			continue;
-		}
 		defines(def->bb, phi->def, target);
 	} END_FOR_EACH_PTR(phi);
 }
-- 
2.10.2