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lra-constraints.c (process_address): Tighten arguments to base_reg_class.

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gcc/
	* lra-constraints.c (process_address): Tighten arguments to
	base_reg_class.  Use simplify_gen_binary to generate PLUS rtxes.

From-SVN: r192836
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Richard Sandiford 2012-10-26 06:41:33 +00:00 committed by Richard Sandiford
parent 02ea4bf41e
commit f9d4ecd445
2 changed files with 11 additions and 6 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-10-26 Richard Sandiford <rdsandiford@googlemail.com>
* lra-constraints.c (process_address): Tighten arguments to
base_reg_class. Use simplify_gen_binary to generate PLUS rtxes.
2012-10-26 Richard Sandiford <rdsandiford@googlemail.com>
* lra-constraints.c (get_index_scale, can_add_disp_p): New functions.

12
gcc/lra-constraints.c
View File

@ -2722,15 +2722,14 @@ process_address (int nop, rtx *before, rtx *after)
{
/* index * scale + disp => new base + index * scale,
case (1) above. */
enum reg_class cl = base_reg_class (mode, as, SCRATCH, SCRATCH);
enum reg_class cl = base_reg_class (mode, as, PLUS,
GET_CODE (*ad.index_loc));
lra_assert (INDEX_REG_CLASS != NO_REGS);
new_reg = lra_create_new_reg (Pmode, NULL_RTX, cl, "disp");
lra_assert (GET_CODE (*addr_loc) == PLUS);
lra_emit_move (new_reg, *ad.disp_loc);
if (CONSTANT_P (XEXP (*addr_loc, 1)))
XEXP (*addr_loc, 1) = XEXP (*addr_loc, 0);
XEXP (*addr_loc, 0) = new_reg;
*addr_loc = simplify_gen_binary (PLUS, GET_MODE (new_reg),
new_reg, *ad.index_loc);
}
}
else if (ad.index_reg_loc == NULL)
@ -2749,7 +2748,8 @@ process_address (int nop, rtx *before, rtx *after)
/* base + scale * index + disp => new base + scale * index,
case (1) above. */
new_reg = base_plus_disp_to_reg (mode, as, &ad);
*addr_loc = gen_rtx_PLUS (Pmode, new_reg, *ad.index_loc);
*addr_loc = simplify_gen_binary (PLUS, GET_MODE (new_reg),
new_reg, *ad.index_loc);
}
*before = get_insns ();
end_sequence ();