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(calculate_giv_inc): Handle increment computed by ASHIFT.

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From-SVN: r10256
This commit is contained in:
Richard Kenner 1995-08-19 17:34:03 -04:00
parent 3c8db3f29c
commit 92065e1fe2
1 changed files with 9 additions and 3 deletions
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12
gcc/unroll.c
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@ -1412,10 +1412,13 @@ 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)
else if (GET_CODE (increment) == IOR
|| GET_CODE (increment) == ASHIFT)
{
/* The rs6000 port loads some constants with IOR. */
/* The rs6000 port loads some constants with IOR.
The alpha port loads some constants with ASHIFT. */
rtx second_part = XEXP (increment, 1);
enum rtx_code code = GET_CODE (increment);
src_insn = PREV_INSN (src_insn);
increment = SET_SRC (PATTERN (src_insn));
@ -1426,7 +1429,10 @@ calculate_giv_inc (pattern, src_insn, regno)
|| GET_CODE (increment) != CONST_INT)
abort ();
increment = GEN_INT (INTVAL (increment) | INTVAL (second_part));
if (code == IOR)
increment = GEN_INT (INTVAL (increment) | INTVAL (second_part));
else
increment = GEN_INT (INTVAL (increment) << INTVAL (second_part));
}
if (GET_CODE (increment) != CONST_INT)