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-rw-r--r--gcc/varasm.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/varasm.c b/gcc/varasm.c
index a258c9e..91d2ea0c 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -3881,8 +3881,11 @@ output_constant (tree exp, unsigned HOST_WIDE_INT size, unsigned int align)
HOST_WIDE_INT op_size = int_size_in_bytes (TREE_TYPE (TREE_OPERAND (exp, 0)));
/* Make sure eliminating the conversion is really a no-op, except with
- VIEW_CONVERT_EXPR to allow for wild Ada unchecked conversions. */
- if (type_size != op_size && TREE_CODE (exp) != VIEW_CONVERT_EXPR)
+ VIEW_CONVERT_EXPRs to allow for wild Ada unchecked conversions and
+ union types to allow for Ada unchecked unions. */
+ if (type_size != op_size
+ && TREE_CODE (exp) != VIEW_CONVERT_EXPR
+ && TREE_CODE (TREE_TYPE (exp)) != UNION_TYPE)
internal_error ("no-op convert from %wd to %wd bytes in initializer",
op_size, type_size);