Re: [PATCH v2 0/5] RISC-V big endian support

[Marcus Comstedt]

Hi again.

I've found the reason for the shift-and test fails.

riscv.md does a match on

  (subreg:QI (and:SI ...) 0)

Unfortunately, due to the way "subreg" is defined, this needs to be

  (subreg:QI (and:SI ...) 3)

on big endian.  I can fix the failures by duplicating the rule and
making the one with "0" check !BYTES_BIG_ENDIAN and the one with "3"
check BYTES_BIG_ENDIAN.  But that's a bit heavy handed of course.
I'll try to come up with a solution using subreg_lowpart_p instead of
hardcoding "0" or "3".


  // Marcus