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function.c (instantiate_virtual_regs_in_insn): Do not simplify addition to move unless dest is a register.

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* function.c (instantiate_virtual_regs_in_insn): Do not simplify
        addition to move unless dest is a register.  Do not skip
        instantiation in dest on addition simplification.

From-SVN: r99637
This commit is contained in:
Richard Henderson 2005-05-12 16:52:37 -07:00 committed by Richard Henderson
parent 8fd1590ca6
commit 9325973e95
2 changed files with 18 additions and 9 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2005-05-13 Richard Henderson <rth@redhat.com>
* function.c (instantiate_virtual_regs_in_insn): Do not simplify
addition to move unless dest is a register. Do not skip
instantiation in dest on addition simplification.
2005-05-13 Hans-Peter Nilsson <hp@axis.com>
* config/cris/cris.c (cris_print_operand) <case 'H'; case

21
gcc/function.c
View File

@ -1317,7 +1317,7 @@ instantiate_virtual_regs_in_insn (rtx insn)
{
HOST_WIDE_INT offset;
int insn_code, i;
bool any_change;
bool any_change = false;
rtx set, new, x, seq;
/* There are some special cases to be handled first. */
@ -1374,6 +1374,7 @@ instantiate_virtual_regs_in_insn (rtx insn)
}
extract_insn (insn);
insn_code = INSN_CODE (insn);
/* Handle a plus involving a virtual register by determining if the
operands remain valid if they're modified in place. */
@ -1387,7 +1388,9 @@ instantiate_virtual_regs_in_insn (rtx insn)
offset += INTVAL (recog_data.operand[2]);
/* If the sum is zero, then replace with a plain move. */
if (offset == 0)
if (offset == 0
&& REG_P (SET_DEST (set))
&& REGNO (SET_DEST (set)) > LAST_VIRTUAL_REGISTER)
{
start_sequence ();
emit_move_insn (SET_DEST (set), new);
@ -1400,7 +1403,6 @@ instantiate_virtual_regs_in_insn (rtx insn)
}
x = gen_int_mode (offset, recog_data.operand_mode[2]);
insn_code = INSN_CODE (insn);
/* Using validate_change and apply_change_group here leaves
recog_data in an invalid state. Since we know exactly what
@ -1411,15 +1413,17 @@ instantiate_virtual_regs_in_insn (rtx insn)
*recog_data.operand_loc[1] = recog_data.operand[1] = new;
*recog_data.operand_loc[2] = recog_data.operand[2] = x;
any_change = true;
goto verify;
/* Fall through into the regular operand fixup loop in
order to take care of operands other than 1 and 2. */
}
}
}
else
extract_insn (insn);
insn_code = INSN_CODE (insn);
any_change = false;
{
extract_insn (insn);
insn_code = INSN_CODE (insn);
}
/* In the general case, we expect virtual registers to appear only in
operands, and then only as either bare registers or inside memories. */
@ -1503,7 +1507,6 @@ instantiate_virtual_regs_in_insn (rtx insn)
any_change = true;
}
verify:
if (any_change)
{
/* Propagate operand changes into the duplicates. */