[Bug middle-end/69578] -Wuninitialized not issuing warning.

[selinger at mathstat dot dal.ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69578

Peter Selinger <selinger at mathstat dot dal.ca> changed:

           What    |Removed                     |Added
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                 CC|                            |selinger at mathstat dot dal.ca

--- Comment #4 from Peter Selinger <selinger at mathstat dot dal.ca> ---
I ran into the same bug with this code:

double weight() {
  double sum;
  int i;

  for (i=0; i<10; i++) {
    sum++;
  }
  return sum;
}

With -Wuninitialized or -Wmaybe-uninitialized, no warning is generated with
-O0. The warning is generated with -O1, -O2, -O3. Other compilers (such as
clang) generate the warning correctly.

Confirmed with gcc 8.2.0.