[PATCH PING] combine: Discard REG_UNUSED note in i2 when register is also referenced in i3 [PR118739]

[Uros Bizjak]

I would like to ping for the following patch that fixes P1 regression:

gcc/ChangeLog:

    * combine.cc (distribute_notes) <case REG_UNUSED>: Remove
    REG_UNUSED note from i2 when the register is also mentioned in i3.

gcc/testsuite/ChangeLog:

    * gcc.target/i386/pr118739.c: New test.

https://gcc.gnu.org/pipermail/gcc-patches/2025-February/675585.html

Thanks,
Uros.