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-rw-r--r--gcc/loop-iv.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c
index 896fe0b1..61074e3 100644
--- a/gcc/loop-iv.c
+++ b/gcc/loop-iv.c
@@ -739,9 +739,9 @@ get_biv_step_1 (df_ref def, rtx reg,
if (GET_CODE (next) == SUBREG)
{
- machine_mode amode = GET_MODE (next);
-
- if (GET_MODE_SIZE (amode) > GET_MODE_SIZE (*inner_mode))
+ scalar_int_mode amode;
+ if (!is_a <scalar_int_mode> (GET_MODE (next), &amode)
+ || GET_MODE_SIZE (amode) > GET_MODE_SIZE (*inner_mode))
return false;
*inner_mode = amode;