[Bug rtl-optimization/81020] [6/7/8 Regression] wrong code with -O -fno-tree-bit-ccp -fno-tree-coalesce-vars -fno-tree-vrp

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81020

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This was fixed with r254875.  Before that combine was throwing away the masking
by 1 and testing against 0, effectively replacing the
  u32_1 &= 1;
  u32_0 |= 0 < u32_1;
with
  u32_0 |= u32_1;
I'll add the testcase and close.