Hi all, When I improved DSE to remove stores where the rhs is known 100% to be an uninitialized variables (ssa_undefined_value_p), I get a few regressions due to an uninitialized warning does not happen: gcc.dg/uninit-40.c for an example. (gcc.dg/analyzer/torture/boxed-int-1.c fails also for a similar reason). Does it make sense to warn at the same time as removing these stores that the variable is uninitialized? Or should we delay to removing the stores until right before the expansion of Gimple to RTL? These stores show up more often with C++ code so removing them early as possible would be a good idea.
Any other options I didn't think of? Thanks, Andrew Pinski
