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Re: Patch: enabling 1st insn scheduling for sh4.
> First guess: there's already a stack adjust between the call and the
> set (they're emitted in that order). Would that confuse it enough?
Here's a quick-n-dirty patch to look for such adjustments, which seems
to work for the one failure I saw (otherwise untested). So, it does
look like the stack adjust is confusing it :-P
Index: sched-deps.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/sched-deps.c,v
retrieving revision 1.68
diff -p -C2 -r1.68 sched-deps.c
*** sched-deps.c 3 Feb 2004 05:39:53 -0000 1.68
--- sched-deps.c 26 Feb 2004 06:20:32 -0000
*************** sched_analyze_insn (struct deps *deps, r
*** 1128,1132 ****
if (GET_CODE (tmp) == SUBREG)
tmp = SUBREG_REG (tmp);
! if (GET_CODE (tmp) == REG)
src_regno = REGNO (tmp);
else
--- 1128,1137 ----
if (GET_CODE (tmp) == SUBREG)
tmp = SUBREG_REG (tmp);
! if (GET_CODE (tmp) == PLUS
! && GET_CODE (XEXP (tmp, 0)) == REG
! && REGNO (XEXP (tmp, 0)) == dest_regno
! && dest_regno == STACK_POINTER_REGNUM)
! src_regno = dest_regno;
! else if (GET_CODE (tmp) == REG)
src_regno = REGNO (tmp);
else