On Tue, 10 May 2016, Jakub Jelinek wrote:
> On Tue, May 10, 2016 at 10:18:59AM +0200, Richard Biener wrote:
> > There are two options - not apply this folding if it doesn't preserve
> > TBAA behavior (first patch) or preserve TBAA behavior by wrapping
> > the base into a MEM_REF (which also requir
On Tue, May 10, 2016 at 10:18:59AM +0200, Richard Biener wrote:
> There are two options - not apply this folding if it doesn't preserve
> TBAA behavior (first patch) or preserve TBAA behavior by wrapping
> the base into a MEM_REF (which also requires fixing
> reference_alias_ptr_type, sth which we
The following patch fixes optimize_bit_field_compare / fold_truth_andor_1
to preserve TBAA behavior of the original access. This makes us
preserve the implementation behavior of the C family languages using
alias-set zero for all union accesses:
/* Permit type-punning when accessing a union, p
