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(duplicate_loop_exit_test): Handle SUBREG in SET_DEST of loop exit

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test statements.

From-SVN: r7654
This commit is contained in:
Richard Kenner 1994-07-05 17:04:32 -04:00
parent 5af9117152
commit e33477bed7
1 changed files with 9 additions and 8 deletions
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17
gcc/jump.c
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@ -2041,7 +2041,7 @@ static int
duplicate_loop_exit_test (loop_start)
rtx loop_start;
{
rtx insn, set, p, link;
rtx insn, set, reg, p, link;
rtx copy = 0;
int num_insns = 0;
rtx exitcode = NEXT_INSN (JUMP_LABEL (next_nonnote_insn (loop_start)));
@ -2098,12 +2098,14 @@ duplicate_loop_exit_test (loop_start)
for (insn = exitcode; insn != lastexit; insn = NEXT_INSN (insn))
if (GET_CODE (insn) == INSN
&& (set = single_set (insn)) != 0
&& GET_CODE (SET_DEST (set)) == REG
&& REGNO (SET_DEST (set)) >= FIRST_PSEUDO_REGISTER
&& regno_first_uid[REGNO (SET_DEST (set))] == INSN_UID (insn))
&& ((reg = SET_DEST (set), GET_CODE (reg) == REG)
|| (GET_CODE (reg) == SUBREG
&& (reg = SUBREG_REG (reg), GET_CODE (reg) == REG)))
&& REGNO (reg) >= FIRST_PSEUDO_REGISTER
&& regno_first_uid[REGNO (reg)] == INSN_UID (insn))
{
for (p = NEXT_INSN (insn); p != lastexit; p = NEXT_INSN (p))
if (regno_last_uid[REGNO (SET_DEST (set))] == INSN_UID (p))
if (regno_last_uid[REGNO (reg)] == INSN_UID (p))
break;
if (p != lastexit)
@ -2116,10 +2118,9 @@ duplicate_loop_exit_test (loop_start)
bzero ((char *) reg_map, max_reg * sizeof (rtx));
}
REG_LOOP_TEST_P (SET_DEST (set)) = 1;
REG_LOOP_TEST_P (reg) = 1;
reg_map[REGNO (SET_DEST (set))]
= gen_reg_rtx (GET_MODE (SET_DEST (set)));
reg_map[REGNO (reg)] = gen_reg_rtx (GET_MODE (reg));
}
}