This patch makes counting the number of instructions of the remainder
(modulo 4) part more accurate.
gcc/ChangeLog:
* gcc/config/xtensa/xtensa.cc (xtensa_expand_block_move):
Make instruction counting more accurate, and simplify emitting insns.
---
gcc/config/xtensa/xtensa.cc | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/gcc/config/xtensa/xtensa.cc b/gcc/config/xtensa/xtensa.cc
index c5518ff9549..d2aabf38339 100644
--- a/gcc/config/xtensa/xtensa.cc
+++ b/gcc/config/xtensa/xtensa.cc
@@ -1313,7 +1313,7 @@ xtensa_expand_block_move (rtx *operands)
move_ratio = 4;
if (optimize > 2)
move_ratio = LARGEST_MOVE_RATIO;
- num_pieces = (bytes / align) + (bytes % align); /* Close enough
anyway. */
+ num_pieces = (bytes / align) + ((bytes % align + 1) / 2);
if (num_pieces > move_ratio)
return 0;
@@ -1350,7 +1350,7 @@ xtensa_expand_block_move (rtx *operands)
temp[next] = gen_reg_rtx (mode[next]);
x = adjust_address (src_mem, mode[next], offset_ld);
- emit_insn (gen_rtx_SET (temp[next], x));
+ emit_move_insn (temp[next], x);
offset_ld += next_amount;
bytes -= next_amount;
@@ -1360,9 +1360,9 @@ xtensa_expand_block_move (rtx *operands)
if (active[phase])
{
active[phase] = false;
-
+
x = adjust_address (dst_mem, mode[phase], offset_st);
- emit_insn (gen_rtx_SET (x, temp[phase]));
+ emit_move_insn (x, temp[phase]);
offset_st += amount[phase];
}
--
2.20.1
