match.pd: (A | (convert?)(A != 0)) EQ|NE 0 -> A EQ|NE 0 [PR114969]

match.pd: (A | (convert?)(A != 0)) EQ|NE 0 -> A EQ|NE 0 [PR114969]

The NE variant is a gimple pattern that comes from the following C++
code:

bool result = (std::max(
                  (unsigned long long) 0, (unsigned long long) var_0))
               | ( var_0 ?  1 : 0);

	PR tree-optimization/114969

gcc/ChangeLog:

	* match.pd (`(A | (convert?)(A != 0)) EQ|NE 0`): New pattern.

gcc/testsuite/ChangeLog:

	* g++.dg/pr114969.C: New test.