[Bug target/55212] [SH] Switch from IRA to LRA

[kkojima at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212

--- Comment #28 from Kazumoto Kojima <kkojima at gcc dot gnu.org> ---
Created attachment 33527
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33527&action=edit
Another reduced test case (with "-m4 -ml -O2 -std=gnu99")

Here is a test case for the ICE in assign_by_spill which looks
caused by another reason.
.reload dump says that the problematic insn is something like

  107: {r166:SF=[r942:SI+r943:SI];use :PSI;clobber r784:SI;}

and

      Creating newreg=942 from oldreg=374, assigning class R0_REGS to address
r942
      Creating newreg=943, assigning class GENERAL_REGS to base + disp r943
       Change to class R0_REGS for r943

which means that R0_REGS is assigned to both r942 and r943.