added comment

[r15485]

diff --git a/ir/be/test/fehler62.c b/ir/be/test/fehler62.c
index 76e32ac..479511b 100644 (file)
--- a/ir/be/test/fehler62.c
+++ b/ir/be/test/fehler62.c
@@ -65,8 +65,11 @@ static rtx* t(rtx *loc, rtx insn) {
                        return &XEXP(x, 0);
                }
                split = t(&XEXP(x, 0), insn);
-               if(split)
+               if(split) {
+                       /* in r15484 (and probably earlier) tail-recursion produces a jump
+                          to the beginning here */
                        return split;
+               }
                return loc;
        }