From a07c6e10f532641bed98c4f2efa075688d7b9f37 Mon Sep 17 00:00:00 2001
From: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date: Thu, 8 Oct 2015 23:02:19 -0400
Subject: fix minor bug in rega

The detection of empty permutations was incorrect
since the changes made to the vector routines.
---
 lisc/rega.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lisc/rega.c b/lisc/rega.c
index e1dbac0..dc9473c 100644
--- a/lisc/rega.c
+++ b/lisc/rega.c
@@ -419,7 +419,7 @@ rega(Fn *fn)
 					pmadd(src, dst, tmp[t].wide);
 				}
 			pmgen();
-			if (!n)
+			if (curi == insb)
 				continue;
 			b1 = balloc();
 			b1->loop = (b->loop+s->loop) / 2;
@@ -439,8 +439,8 @@ rega(Fn *fn)
 		}
 	}
 	for (b=fn->start; b; b=b->link)
-		while ((p=b->phi))
-			b->phi = p->link;
+		while (b->phi)
+			b->phi = b->phi->link;
 	fn->reg = regu;
 
 	if (debug['R']) {
-- 
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