* loop.c (force_movables): Transitively increase the priorities of

	all insns forces by an insn, not just the first one.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@77419 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 9 insertions, 3 deletions

diff --git a/gcc/loop.c b/gcc/loop.c
index 55c9834b288..911d561fd6b 100644
--- a/gcc/loop.c
+++ b/gcc/loop.c
@@ -1469,12 +1469,18 @@ force_movables (struct loop_movables *movables)
 	  m = 0;
 
 	/* Increase the priority of the moving the first insn
-	   since it permits the second to be moved as well.  */
+	   since it permits the second to be moved as well.
+	   Likewise for insns already forced by the first insn.  */
 	if (m != 0)
 	  {
+	    struct movable *m2;
+
 	    m->forces = m1;
-	    m1->lifetime += m->lifetime;
-	    m1->savings += m->savings;
+	    for (m2 = m1; m2; m2 = m2->forces)
+	      {
+		m2->lifetime += m->lifetime;
+		m2->savings += m->savings;
+	      }
 	  }
       }
 }