[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 gcc-bugzilla@gcc.gnu.org
Mon Nov 27 17:42:00 GMT 2017


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;
  u32_0 |= u32_1;
I'll add the testcase and close.

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