diff options
Diffstat (limited to 'gcc/tree-ssa-copy.c')
| -rw-r--r-- | gcc/tree-ssa-copy.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c index 551ebe3..75a4154 100644 --- a/gcc/tree-ssa-copy.c +++ b/gcc/tree-ssa-copy.c @@ -280,6 +280,7 @@ struct prop_value_d { typedef struct prop_value_d prop_value_t; static prop_value_t *copy_of; +static unsigned n_copy_of; /* Return true if this statement may generate a useful copy. */ @@ -664,7 +665,8 @@ init_copy_prop (void) { basic_block bb; - copy_of = XCNEWVEC (prop_value_t, num_ssa_names); + n_copy_of = num_ssa_names; + copy_of = XCNEWVEC (prop_value_t, n_copy_of); FOR_EACH_BB (bb) { @@ -728,7 +730,10 @@ init_copy_prop (void) static tree get_value (tree name) { - tree val = copy_of[SSA_NAME_VERSION (name)].value; + tree val; + if (SSA_NAME_VERSION (name) >= n_copy_of) + return NULL_TREE; + val = copy_of[SSA_NAME_VERSION (name)].value; if (val && val != name) return val; return NULL_TREE; |