The old gcc.dg/vect/O3-pr36098.c now FAILs on target that support
general permutation. It was added for a miscompile but only tested
that we don't vectorize - now we do, but correctly.
I believe we've recently got a duplicate but proper runtime testcase.
Tested on x86_64-unknown-linux-gnu with various flags, committed.
Richard.
2016-03-07 Richard Biener <rguent...@suse.de>
PR testsuite/70109
* gcc.dg/vect/O3-pr36098.c: New testcase.
Index: gcc/testsuite/gcc.dg/vect/O3-pr36098.c
===================================================================
--- gcc/testsuite/gcc.dg/vect/O3-pr36098.c (revision 233964)
+++ gcc/testsuite/gcc.dg/vect/O3-pr36098.c (working copy)
@@ -17,4 +17,8 @@ void foo (int ncons, t_sortblock *sb, in
iatom[m]=sb[i].iatom[m];
}
-/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 0 "vect" }
} */
+/* The testcase was originally added for correctness reasons but now we
+ can vectorize it correctly if the target supports the permutations
+ required. */
+
+/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 0 "vect" {
target { ! vect_perm } } } } */
