Re: [PATCH] RISC-V: allow bseti on SImode without sign-extension

[Jeff Law via Gcc-patches]

On 11/8/22 13:03, Philipp Tomsich wrote:

As long as the SImode operand is not a partial subreg, we can use a
bseti without postprocessing to or in a bit, as the middle end is
smart enough to stay away from the signbit.

gcc/ChangeLog:

        * config/riscv/bitmanip.md (*bsetidisi): New pattern.

gcc/testsuite/ChangeLog:

        * gcc.target/riscv/zbs-bexti-02.c: New test.

OK, with my usual grumble about SUBREGs.

jeff