On Sun, Dec 22, 2019 at 11:10:09AM -0600, Segher Boessenkool wrote:
> The patch is okay for trunk (with the comment moved, and the rtx_equal_p
> fixed). Thanks!
Here is the patch I committed (subversion id 279937):
2020-01-06 Michael Meissner <meiss...@linux.ibm.com>
* config/rs6000/rs6000.c (rs6000_adjust_vec_address): Add support
for the offset being 34-bits when -mcpu=future is used.
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c (revision 279910)
+++ gcc/config/rs6000/rs6000.c (working copy)
@@ -6797,11 +6797,19 @@ rs6000_adjust_vec_address (rtx scalar_re
HOST_WIDE_INT offset = INTVAL (op1) + INTVAL (element_offset);
rtx offset_rtx = GEN_INT (offset);
- if (IN_RANGE (offset, -32768, 32767)
+ /* 16-bit offset. */
+ if (SIGNED_INTEGER_16BIT_P (offset)
&& (scalar_size < 8 || (offset & 0x3) == 0))
new_addr = gen_rtx_PLUS (Pmode, op0, offset_rtx);
+
+ /* 34-bit offset if we have prefixed addresses. */
+ else if (TARGET_PREFIXED_ADDR && SIGNED_INTEGER_34BIT_P (offset))
+ new_addr = gen_rtx_PLUS (Pmode, op0, offset_rtx);
+
else
{
+ /* Offset overflowed, move offset to the temporary (which will
+ likely be split), and do X-FORM addressing. */
emit_move_insn (base_tmp, offset_rtx);
new_addr = gen_rtx_PLUS (Pmode, op0, base_tmp);
}
@@ -6830,6 +6838,12 @@ rs6000_adjust_vec_address (rtx scalar_re
emit_insn (insn);
}
+ /* Make sure we don't overwrite the temporary if the element being
+ extracted is variable, and we've put the offset into base_tmp
+ previously. */
+ else if (reg_mentioned_p (base_tmp, element_offset))
+ emit_insn (gen_add2_insn (base_tmp, op1));
+
else
{
emit_move_insn (base_tmp, op1);
--
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meiss...@linux.ibm.com, phone: +1 (978) 899-4797
