[PATCH] middle-end: Fix issue of poly_uint16 (1, 1) in self test

[juzhe . zhong]

From: zhongjuzhe <juzhe.zh...@rivai.ai>

This patch fix issue of poly_uint16 (1, 1) in machine mode self test.

gcc/ChangeLog:

        * simplify-rtx.cc (test_vector_subregs_fore_back): Make first value and 
repeat value different.

---
 gcc/simplify-rtx.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc
index 7d09bf7103d..fc0d6c3ca2a 100644
--- a/gcc/simplify-rtx.cc
+++ b/gcc/simplify-rtx.cc
@@ -8434,7 +8434,7 @@ test_vector_subregs_fore_back (machine_mode inner_mode)
   for (unsigned int i = 0; i < count; ++i)
     builder.quick_push (gen_int_mode (i, int_mode));
   for (unsigned int i = 0; i < count; ++i)
-    builder.quick_push (gen_int_mode (-(int) i, int_mode));
+    builder.quick_push (gen_int_mode (-1 - (int) i, int_mode));
   rtx x = builder.build ();
 
   test_vector_subregs_modes (x);
-- 
2.36.1