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lra-constraints (process_alt_operands): Use the result elimination register for operand when matching constraints.

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2013-10-31  Vladimir Makarov  <vmakarov@redhat.com>

	* lra-constraints (process_alt_operands): Use the result
	elimination register for operand when matching constraints.

From-SVN: r204267
This commit is contained in:
Vladimir Makarov 2013-10-31 16:00:38 +00:00 committed by Vladimir Makarov
parent c1c2162ead
commit 7214306b3e
2 changed files with 23 additions and 9 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2013-10-31 Vladimir Makarov <vmakarov@redhat.com>
* lra-constraints (process_alt_operands): Use the result
elimination register for operand when matching constraints.
2013-10-31 Jakub Jelinek <jakub@redhat.com>
* tree-vrp.c (maybe_set_nonzero_bits): New function.

27
gcc/lra-constraints.c
View File

@ -1466,23 +1466,32 @@ process_alt_operands (int only_alternative)
function. */
for (nop = 0; nop < n_operands; nop++)
{
rtx reg;
op = no_subreg_reg_operand[nop] = *curr_id->operand_loc[nop];
/* The real hard regno of the operand after the allocation. */
hard_regno[nop] = get_hard_regno (op);
operand_reg[nop] = op;
biggest_mode[nop] = GET_MODE (operand_reg[nop]);
if (GET_CODE (operand_reg[nop]) == SUBREG)
operand_reg[nop] = reg = op;
biggest_mode[nop] = GET_MODE (op);
if (GET_CODE (op) == SUBREG)
{
operand_reg[nop] = SUBREG_REG (operand_reg[nop]);
operand_reg[nop] = reg = SUBREG_REG (op);
if (GET_MODE_SIZE (biggest_mode[nop])
< GET_MODE_SIZE (GET_MODE (operand_reg[nop])))
biggest_mode[nop] = GET_MODE (operand_reg[nop]);
< GET_MODE_SIZE (GET_MODE (reg)))
biggest_mode[nop] = GET_MODE (reg);
}
if (REG_P (operand_reg[nop]))
no_subreg_reg_operand[nop] = operand_reg[nop];
else
if (! REG_P (reg))
operand_reg[nop] = NULL_RTX;
else if (REGNO (reg) >= FIRST_PSEUDO_REGISTER
|| ((int) REGNO (reg)
== lra_get_elimination_hard_regno (REGNO (reg))))
no_subreg_reg_operand[nop] = reg;
else
operand_reg[nop] = no_subreg_reg_operand[nop]
/* Just use natural mode for elimination result. It should
be enough for extra constraints hooks. */
= regno_reg_rtx[hard_regno[nop]];
}
/* The constraints are made of several alternatives. Each operand's