diff options
| author | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-20 19:09:58 +0000 |
|---|---|---|
| committer | vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-20 19:09:58 +0000 |
| commit | e0420317dc2c7e6d8f4e4aa28e4b37d3e2067c3d (patch) | |
| tree | 24f3380d074ddd93ec8a83d05a5e346e89be540d /gcc/lra-constraints.c | |
| parent | c7b2ff9a291bfe558fd7e4907b0482dde2dc1a97 (diff) | |
| download | gcc-e0420317dc2c7e6d8f4e4aa28e4b37d3e2067c3d.tar.gz | |
2013-01-20 Vladimir Makarov <vmakarov@redhat.com>
PR target/55433
* lra-constraints.c (curr_insn_transform): Don't reuse original
insn for secondary memory move when memory mode should be
different.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@195322 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/lra-constraints.c')
| -rw-r--r-- | gcc/lra-constraints.c | 23 |
1 files changed, 17 insertions, 6 deletions
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index f13f37233b4..01c8cf143cf 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -2791,7 +2791,7 @@ curr_insn_transform (void) if (use_sec_mem_p) { - rtx new_reg, src, dest, rld, rld_subst; + rtx new_reg, src, dest, rld; enum machine_mode sec_mode, rld_mode; lra_assert (sec_mem_p); @@ -2811,17 +2811,28 @@ curr_insn_transform (void) NO_REGS, "secondary"); /* If the mode is changed, it should be wider. */ lra_assert (GET_MODE_SIZE (sec_mode) >= GET_MODE_SIZE (rld_mode)); - rld_subst = (sec_mode == rld_mode ? new_reg : gen_lowpart_SUBREG (rld_mode, new_reg)); - if (dest == rld) - { - *curr_id->operand_loc[0] = rld_subst; + if (sec_mode != rld_mode) + { + /* If the target says specifically to use another mode for + secondary memory moves we can not reuse the original + insn. */ + after = emit_spill_move (false, new_reg, dest); + lra_process_new_insns (curr_insn, NULL_RTX, after, + "Inserting the sec. move"); + before = emit_spill_move (true, new_reg, src); + lra_process_new_insns (curr_insn, before, NULL_RTX, "Changing on"); + lra_set_insn_deleted (curr_insn); + } + else if (dest == rld) + { + *curr_id->operand_loc[0] = new_reg; after = emit_spill_move (false, new_reg, dest); lra_process_new_insns (curr_insn, NULL_RTX, after, "Inserting the sec. move"); } else { - *curr_id->operand_loc[1] = rld_subst; + *curr_id->operand_loc[1] = new_reg; before = emit_spill_move (true, new_reg, src); lra_process_new_insns (curr_insn, before, NULL_RTX, "Inserting the sec. move"); |