From 98f58cca618a99e282c7add2ecbe59002c867c60 Mon Sep 17 00:00:00 2001
From: Kito Cheng <kito@andestech.com>
Date: Thu, 29 May 2014 23:53:23 +0800
Subject: [PATCH] Fix caller-save store/restore instruction for large mode in
lra
- The original code assume store/restore will always have only
one insn, it's will fail if you split in move pattern!!!
---
gcc/lra-constraints.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
@@ -4918,15 +4918,14 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn,
reg_renumber[REGNO (new_reg)] = hard_regno;
}
save = emit_spill_move (true, new_reg, original_reg);
- if (NEXT_INSN (save) != NULL_RTX)
+ if (NEXT_INSN (save) != NULL_RTX && !call_save_p)
{
- lra_assert (! call_save_p);
if (lra_dump_file != NULL)
{
fprintf
(lra_dump_file,
- " Rejecting split %d->%d resulting in > 2 %s save insns:\n",
- original_regno, REGNO (new_reg), call_save_p ? "call" : "");
+ " Rejecting split %d->%d resulting in > 2 save insns:\n",
+ original_regno, REGNO (new_reg));
dump_rtl_slim (lra_dump_file, save, NULL, -1, 0);
fprintf (lra_dump_file,
" ))))))))))))))))))))))))))))))))))))))))))))))))\n");
@@ -4934,15 +4933,14 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn,
return false;
}
restore = emit_spill_move (false, new_reg, original_reg);
- if (NEXT_INSN (restore) != NULL_RTX)
+ if (NEXT_INSN (restore) != NULL_RTX && !call_save_p)
{
- lra_assert (! call_save_p);
if (lra_dump_file != NULL)
{
fprintf (lra_dump_file,
" Rejecting split %d->%d "
- "resulting in > 2 %s restore insns:\n",
- original_regno, REGNO (new_reg), call_save_p ? "call" : "");
+ "resulting in > 2 restore insns:\n",
+ original_regno, REGNO (new_reg));
dump_rtl_slim (lra_dump_file, restore, NULL, -1, 0);
fprintf (lra_dump_file,
" ))))))))))))))))))))))))))))))))))))))))))))))))\n");
--
1.8.3.1.549.g1f3a412