Simplification Comparison (Clang9 vs Clang trunk)

[k-arrows]

Consider the following function:

bool foo(int a, int b)
{
   return (a + 1) || (a * b + b);
}

Clang9 (and GCC) can simplify foo, but Clang trunk cannot.
https://godbolt.org/z/nTj67b956

[dtcxzyw]

I guess it will be fixed by further improvement of #69840 by handling more complicated expressions instead of binops.