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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1999-02-24 11:18:59 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1999-02-24 11:18:59 +0000 |
| commit | 69688f1ed7606189b16bbdbd506dfc6e863e8309 (patch) | |
| tree | bfd28bdcb71fb9f9e964e3c992b6656e251ff9f5 /gcc/unroll.c | |
| parent | d2ae3ff54e52449707326c83c1286d0928e25817 (diff) | |
| download | gcc-69688f1ed7606189b16bbdbd506dfc6e863e8309.zip gcc-69688f1ed7606189b16bbdbd506dfc6e863e8309.tar.gz gcc-69688f1ed7606189b16bbdbd506dfc6e863e8309.tar.bz2 | |
* unroll.c (unroll_loop): Avoid out-of-bounds index for local_regno.
From-SVN: r25399
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 8737544..bf03757 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -238,6 +238,7 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before, struct inline_remap *map; char *local_label; char *local_regno; + int max_local_regnum; int maxregnum; rtx exit_label = 0; rtx start_label; @@ -755,6 +756,9 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before, /* The preconditioning code may allocate two new pseudo registers. */ maxregnum = max_reg_num (); + /* local_regno is only valid for regnos < max_local_regnum. */ + max_local_regnum = maxregnum; + /* Allocate and zero out the splittable_regs and addr_combined_regs arrays. These must be zeroed here because they will be used if loop preconditioning is performed, and must be zero for that case. @@ -1051,7 +1055,7 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before, if (local_label[j]) set_label_in_map (map, j, gen_label_rtx ()); - for (j = FIRST_PSEUDO_REGISTER; j < maxregnum; j++) + for (j = FIRST_PSEUDO_REGISTER; j < max_local_regnum; j++) if (local_regno[j]) { map->reg_map[j] = gen_reg_rtx (GET_MODE (regno_reg_rtx[j])); @@ -1199,7 +1203,7 @@ unroll_loop (loop_end, insn_count, loop_start, end_insert_before, if (local_label[j]) set_label_in_map (map, j, gen_label_rtx ()); - for (j = FIRST_PSEUDO_REGISTER; j < maxregnum; j++) + for (j = FIRST_PSEUDO_REGISTER; j < max_local_regnum; j++) if (local_regno[j]) { map->reg_map[j] = gen_reg_rtx (GET_MODE (regno_reg_rtx[j])); |