https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78633
--- Comment #5 from Oleg Endo <olegendo at gcc dot gnu.org> --- (In reply to Kazumoto Kojima from comment #1) > Here is a trial patch > > diff --git a/config/sh/sh.md b/config/sh/sh.md > index c6956a0..c83bf08 100644 > --- a/config/sh/sh.md > +++ b/config/sh/sh.md > @@ -858,7 +858,8 @@ > operands of the tstsi_t insn, which is generally the case. */ > if (dump_file) > fprintf (dump_file, "cmpeqsi_t: replacing with tstsi_t\n"); > - emit_insn (gen_tstsi_t (XEXP (op.set_src, 0), XEXP (op.set_src, 1))); > + emit_insn (gen_tstsi_t (copy_rtx (XEXP (op.set_src, 0)), > + XEXP (op.set_src, 1))); > DONE; > } > > Oleg, could you take a look at the issue? Although the patch fixes > the ICE, I'm not sure if it's OK and enough. Hm ... if this is a latent bug, I would like to understand why it's wrong to reference a reg rtx in the insn input operands. I've been doing that in several places in similar ways...
