c-family: Handle RAW_DATA_CST in complete_array_type [PR117313]

c-family: Handle RAW_DATA_CST in complete_array_type [PR117313]

The following testcase ICEs, because
add_flexible_array_elts_to_size -> complete_array_type
is done only after braced_lists_to_strings which optimizes
RAW_DATA_CST surrounded by INTEGER_CST into a larger RAW_DATA_CST
covering even the boundaries, while I thought it is done before
that.
So, RAW_DATA_CST now can be the last constructor_elt in a CONSTRUCTOR
and so we need the function to take it into account (handle it as
RAW_DATA_CST standing for RAW_DATA_LENGTH consecutive elements).

The function wants to support both CONSTRUCTORs without indexes and with
them (for non-RAW_DATA_CST elts it was just adding 1 for the current
index).  So, if the RAW_DATA_CST elt has ce->index, we need to add
RAW_DATA_LENGTH (ce->value) - 1, while if it doesn't (and it isn't cnt == 0
case where curindex is 0), add that plus 1, i.e. RAW_DATA_LENGTH (ce->value).

2024-10-29  Jakub Jelinek  <jakub@redhat.com>

	PR c/117313
gcc/c-family/
	* c-common.cc (complete_array_type): For RAW_DATA_CST elements
	advance curindex by RAW_DATA_LENGTH or one less than that if
	ce->index is non-NULL.  Handle even the first element if
	it is RAW_DATA_CST.  Formatting fix.
gcc/testsuite/
	* c-c++-common/init-6.c: New test.