[PATCH] Add save_expr langhook (PR c/68513)

[Marek Polacek]

On Sat, Nov 28, 2015 at 08:50:12AM +0100, Richard Biener wrote:
> Different approach: after the FE folds (unexpectedly?), scan the result for
> SAVE_EXPRs and if found, drop the folding.

Neither this fixes this problem completely, because we simply don't know where
those SAVE_EXPRs might be introduced: it might be convert(), but e.g. when I
changed the original testcase a tiny bit (added -), then those SAVE_EXPRs were
introduced in a different spot (via c_process_stmt_expr -> c_fully_fold).

	Marek