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(calculate_giv_inc): Handle constants loaded with IOR.

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From-SVN: r7918
This commit is contained in:
Jim Wilson 1994-08-14 15:55:17 -07:00
parent bbd4b75be0
commit 8700c49499
1 changed files with 17 additions and 1 deletions
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18
gcc/unroll.c
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@ -1335,11 +1335,27 @@ calculate_giv_inc (pattern, src_insn, regno)
one of the LO_SUM rtx. */
if (GET_CODE (increment) == LO_SUM)
increment = XEXP (increment, 1);
else if (GET_CODE (increment) == IOR)
{
/* The rs6000 port loads some constants with IOR. */
rtx second_part = XEXP (increment, 1);
src_insn = PREV_INSN (src_insn);
increment = SET_SRC (PATTERN (src_insn));
/* Don't need the last insn anymore. */
delete_insn (get_last_insn ());
if (GET_CODE (second_part) != CONST_INT
|| GET_CODE (increment) != CONST_INT)
abort ();
increment = GEN_INT (INTVAL (increment) | INTVAL (second_part));
}
if (GET_CODE (increment) != CONST_INT)
abort ();
/* The insn loading the constant into a register is not longer needed,
/* The insn loading the constant into a register is no longer needed,
so delete it. */
delete_insn (get_last_insn ());
}