On 12/28/2021 6:27 PM, Xionghu Luo via Gcc-patches wrote:
Bootstrapped and regtested on powerpc64le-linux-gnu {P10,P9}
powerpc64-linux-gnu {P8, P7} and X86. OK for master?
gcc/ChangeLog:
PR 90323
* simplify-rtx.c (simplify_context::simplify_binary_operation_1): Relax
C from constant to constant or reg.
gcc/testsuite/ChangeLog:
* gcc.target/powerpc/pr90323.c: New test.
If C is not a constant and the target does not have and-complement
instructions, then this is likely worse than the original. If you want
to do this transformation, then you probably need to be checking target
costs.
Jeff
