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| author | Bernd Schmidt <bernds@redhat.com> | 2016-03-14 15:08:54 +0000 |
|---|---|---|
| committer | Bernd Schmidt <bernds@gcc.gnu.org> | 2016-03-14 15:08:54 +0000 |
| commit | 3cbf012a4007511b8989d90e9450a93d4c75a8a6 (patch) | |
| tree | fa0721d7527c8d8af0cd822d4a28519e071f5320 /gcc/lra-constraints.c | |
| parent | a9fee7cdc3c62d0e51730b6a9814909c557d3070 (diff) | |
| download | gcc-3cbf012a4007511b8989d90e9450a93d4c75a8a6.zip gcc-3cbf012a4007511b8989d90e9450a93d4c75a8a6.tar.gz gcc-3cbf012a4007511b8989d90e9450a93d4c75a8a6.tar.bz2 | |
LRA: identify biggest access mode for hard_regs and use it in split_reg
PR target/70083
* lra-lives.c (process_bb_lives): Also update biggest mode for hard
regs.
(lra_create_live_ranges_1): initialize hard register biggest_mode to
VOIDmode.
* lra-constraints.c (split_reg): For hard regs, try to find the
biggest single-register mode used in the function.
testsuite/
PR target/70083
* gcc.dg/torture/pr70083.c: New test.
* gcc.target/i386/pr70083.c: New test.
From-SVN: r234184
Diffstat (limited to 'gcc/lra-constraints.c')
| -rw-r--r-- | gcc/lra-constraints.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index b070218..171ed65 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -4972,6 +4972,7 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn, rtx_insn *restore, *save; bool after_p; bool call_save_p; + machine_mode mode; if (original_regno < FIRST_PSEUDO_REGISTER) { @@ -4979,24 +4980,32 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn, hard_regno = original_regno; call_save_p = false; nregs = 1; + mode = lra_reg_info[hard_regno].biggest_mode; + machine_mode reg_rtx_mode = GET_MODE (regno_reg_rtx[hard_regno]); + if (GET_MODE_SIZE (mode) > GET_MODE_SIZE (reg_rtx_mode)) + { + original_reg = regno_reg_rtx[hard_regno]; + mode = reg_rtx_mode; + } + else + original_reg = gen_rtx_REG (mode, hard_regno); } else { + mode = PSEUDO_REGNO_MODE (original_regno); hard_regno = reg_renumber[original_regno]; - nregs = hard_regno_nregs[hard_regno][PSEUDO_REGNO_MODE (original_regno)]; + nregs = hard_regno_nregs[hard_regno][mode]; rclass = lra_get_allocno_class (original_regno); original_reg = regno_reg_rtx[original_regno]; call_save_p = need_for_call_save_p (original_regno); } - original_reg = regno_reg_rtx[original_regno]; lra_assert (hard_regno >= 0); if (lra_dump_file != NULL) fprintf (lra_dump_file, " ((((((((((((((((((((((((((((((((((((((((((((((((\n"); + if (call_save_p) { - machine_mode mode = GET_MODE (original_reg); - mode = HARD_REGNO_CALLER_SAVE_MODE (hard_regno, hard_regno_nregs[hard_regno][mode], mode); @@ -5004,8 +5013,7 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn, } else { - rclass = choose_split_class (rclass, hard_regno, - GET_MODE (original_reg)); + rclass = choose_split_class (rclass, hard_regno, mode); if (rclass == NO_REGS) { if (lra_dump_file != NULL) @@ -5023,8 +5031,7 @@ split_reg (bool before_p, int original_regno, rtx_insn *insn, } return false; } - new_reg = lra_create_new_reg (GET_MODE (original_reg), original_reg, - rclass, "split"); + new_reg = lra_create_new_reg (mode, original_reg, rclass, "split"); reg_renumber[REGNO (new_reg)] = hard_regno; } save = emit_spill_move (true, new_reg, original_reg); |