This test is failing on targets with low branch costs. For those
targets we expand the code radically differently and the test really
doesn't make much sense -- much like vrp87.c.
This patch copies the list of targets where the test is meaningless from
vrp87.c.
Installed onto the trunk.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5adbc01..f2d9895 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,9 @@
2013-06-20 Jeff Law <l...@redhat.com>
+ PR tree-optimization/57660
+ * gcc.dg/tree-ssa/forwprop-28.c: Don't run test on various targets
+ based on their branch cost.
+
* gcc.dg/tree-ssa/forwprop-28.c: Add missing dg-final.
2013-06-20 Tobias Burnus <bur...@net-b.de>
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/forwprop-28.c
b/gcc/testsuite/gcc.dg/tree-ssa/forwprop-28.c
index 8e870b9..a64987b 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/forwprop-28.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/forwprop-28.c
@@ -1,4 +1,4 @@
-/* { dg-do compile } */
+/* { dg-do compile { target { ! "m68k*-*-* mmix*-*-* mep*-*-* bfin*-*-*
v850*-*-* picochip*-*-* moxie*-*-* cris*-*-* m32c*-*-* fr30*-*-* mcore*-*-*
powerpc*-*-* xtensa*-*-*"} } } */
/* { dg-options "-O2 -fdump-tree-forwprop1" } */
extern char *frob (void);
