On Thu, Nov 22, 2018 at 01:30:03PM +0000, Michael Matz wrote:
> On Wed, 21 Nov 2018, Richard Biener wrote:
>
> > then this leads to wrong debug info showing a value for 'a' that never
> > existed.
>
> var-tracking was specifically created so that the base-vars of SSA names
> aren't necessary for debug info anymore ...
Not to my knowledge. The original var-tracking used that information
almost exclusively (whatever ends up in REG_EXPR/MEM_EXPR and that is based
on the base vars of SSA_NAMEs).
VTA doesn't need that for vars for which there are debug stmts, but
otherwise it is still used.
Jakub
