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-rw-r--r--gcc/rtl.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/rtl.h b/gcc/rtl.h
index 42c4db6524a..8f6bb99e59c 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -232,7 +232,8 @@ struct object_block GTY(())
/* RTL expression ("rtx"). */
struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"),
- chain_prev ("RTX_PREV (&%h)")))
+ chain_prev ("RTX_PREV (&%h)"),
+ size_not_fixed ("")))
{
/* The kind of expression this is. */
ENUM_BITFIELD(rtx_code) code: 16;