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| author | Jim Wilson <wilson@gcc.gnu.org> | 1995-01-20 18:12:01 -0800 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1995-01-20 18:12:01 -0800 |
| commit | 3fc347fa0d8064c6c7558648af4a51d1d476f834 (patch) | |
| tree | 4d863102585eba6bd2323d9126410ea5c2142a4e /gcc/unroll.c | |
| parent | f415f7bed7fbb4d07a67879d2eddd1dc6e8fdc2a (diff) | |
| download | gcc-3fc347fa0d8064c6c7558648af4a51d1d476f834.zip gcc-3fc347fa0d8064c6c7558648af4a51d1d476f834.tar.gz gcc-3fc347fa0d8064c6c7558648af4a51d1d476f834.tar.bz2 | |
(copy_loop_body): When check for shared address givs, use new same_insn field.
(copy_loop_body): When check for shared address givs, use
new same_insn field.
(find_splittable_givs): New variable v2. Scan givs to set new
same_insn field. Use same_insn to indentify address givs to be
shared.
From-SVN: r8786
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 787bda8..784e09a 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -1547,8 +1547,7 @@ copy_loop_body (copy_start, copy_end, map, exit_label, last_iteration, /* Check for shared address givs, and avoid incrementing the shared psuedo reg more than once. */ - if (! (tv != v && tv->insn == v->insn - && tv->new_reg == v->new_reg)) + if (! tv->same_insn) { /* tv->dest_reg may actually be a (PLUS (REG) (CONST)) here, so we must call plus_constant @@ -2449,11 +2448,19 @@ find_splittable_givs (bl, unroll_type, loop_start, loop_end, increment, rtx increment; int unroll_number; { - struct induction *v; + struct induction *v, *v2; rtx final_value; rtx tem; int result = 0; + /* Scan the list of givs, and set the same_insn field when there are + multiple identical givs in the same insn. */ + for (v = bl->giv; v; v = v->next_iv) + for (v2 = v->next_iv; v2; v2 = v2->next_iv) + if (v->insn == v2->insn && rtx_equal_p (v->new_reg, v2->new_reg) + && ! v2->same_insn) + v2->same_insn = v; + for (v = bl->giv; v; v = v->next_iv) { rtx giv_inc, value; @@ -2629,14 +2636,13 @@ find_splittable_givs (bl, unroll_type, loop_start, loop_end, increment, v->const_adjust = 0; - if (v->same && v->same->insn == v->insn - && v->new_reg == v->same->new_reg) + if (v->same_insn) { - v->dest_reg = v->same->dest_reg; + v->dest_reg = v->same_insn->dest_reg; if (loop_dump_stream) fprintf (loop_dump_stream, - "Sharing address givs with reg %d\n", - REGNO (v->dest_reg)); + "Sharing address givs in insn %d\n", + INSN_UID (v->insn)); } else if (unroll_type != UNROLL_COMPLETELY) { |