[Bug tree-optimization/91470] [10 Regression] bogus uninitialized warning in trans-intrinsic.c

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91470

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 46720
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46720&action=edit
unreduced testcase

A bit reduced testcase from trans-intrinsic.c (in case it goes latent there due
to changes).  Needs more reduction to capture the meat of things.  The code
basically does

int a, b;
for (int i = 0; i < 2; ++i)
  if (i == 0)
    a = 1;
  else
    b = 2;

use a/b

and we warn on one of the uses.  It's not that simple of course since this
kind of simple testcase is handled well...