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| author | Jan Hubicka <jh@suse.cz> | 2000-04-27 12:57:35 +0000 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2000-04-27 12:57:35 +0000 |
| commit | 28b6b9b2d3a5141d5e9055ed884d5ddc5e5dc335 (patch) | |
| tree | 172d402a32e47ad7c82ca5132277d43782e4df26 /gcc | |
| parent | af4464eb46fd1fcec3a8f69b320fa069f3d179a0 (diff) | |
| download | gcc-28b6b9b2d3a5141d5e9055ed884d5ddc5e5dc335.zip gcc-28b6b9b2d3a5141d5e9055ed884d5ddc5e5dc335.tar.gz gcc-28b6b9b2d3a5141d5e9055ed884d5ddc5e5dc335.tar.bz2 | |
* loop.c (load_mems) Don't use hard registers for the hoisting.
* unroll.c (unroll_loop): Avoid overflow in the n_iterations
calculation; rename const_equiv array in the preconditioning code
from loop_unroll to loop_unroll_precondition
From-SVN: r33480
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/loop.c | 8 | ||||
| -rw-r--r-- | gcc/unroll.c | 4 |
3 files changed, 18 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fc50eb9..5268b8f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +Thu Apr 27 14:54:22 MET DST 2000 Jan Hubicka <jh@suse.cz> + + * loop.c (load_mems) Don't use hard registers for the hoisting. + + * unroll.c (unroll_loop): Avoid overflow in the n_iterations + calculation; rename const_equiv array in the preconditioning code + from loop_unroll to loop_unroll_precondition + 2000-04-27 Richard Henderson <rth@cygnus.com> * flow.c (struct propagate_block_info): Remove new_dead, new_live; @@ -9887,7 +9887,13 @@ load_mems (loop) { if (CONSTANT_P (equiv->loc)) const_equiv = equiv; - else if (GET_CODE (equiv->loc) == REG) + else if (GET_CODE (equiv->loc) == REG + /* Extending hard register lifetimes cuases crash + on SRC targets. Doing so on non-SRC is + probably also not good idea, since we most + probably have pseudoregister equivalence as + well. */ + && REGNO (equiv->loc) >= FIRST_PSEUDO_REGISTER) best_equiv = equiv; } /* Use the constant equivalence if that is cheap enough. */ diff --git a/gcc/unroll.c b/gcc/unroll.c index aa8f3ee..6ecef32 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -385,6 +385,8 @@ unroll_loop (loop, insn_count, end_insert_before, strength_reduce_p) return; } else if (loop_info->n_iterations > 0 + /* Avoid overflow in the next expression. */ + && loop_info->n_iterations < MAX_UNROLLED_INSNS && loop_info->n_iterations * insn_count < MAX_UNROLLED_INSNS) { unroll_number = loop_info->n_iterations; @@ -906,7 +908,7 @@ unroll_loop (loop, insn_count, end_insert_before, strength_reduce_p) map->reg_map = (rtx *) xmalloc (maxregnum * sizeof (rtx)); VARRAY_CONST_EQUIV_INIT (map->const_equiv_varray, maxregnum, - "unroll_loop"); + "unroll_loop_precondition"); global_const_equiv_varray = map->const_equiv_varray; init_reg_map (map, maxregnum); |