[Bug c++/14179] [5/6/7 Regression] out of memory while parsing array with many initializers

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=14179

--- Comment #77 from Richard Biener <rguenth at gcc dot gnu.org> ---
So the "low hanging fruit" remaining is reshape_init_array copying the whole
array even if not necessary.

INTEGER_CSTs still account for most of the memory use (200MB) apart from C++
preprocessor tokens (530MB) and the actual array of tree pointers for the
constructors (2x 130MB at peak).