diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/ggc-page.c | 12 |
2 files changed, 17 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 05a7437..3cf590b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-08-23 Zack Weinberg <zack@codesourcery.com> + + * ggc-page.c (compute_inverse): Short circuit calculation for + object sizes larger than half a page. + 2002-08-23 David Edelsohn <edelsohn@gnu.org> * config/rs6000/rs6000.c (rs6000_elf_select_section): Treat diff --git a/gcc/ggc-page.c b/gcc/ggc-page.c index af3af1a..294bdfc 100644 --- a/gcc/ggc-page.c +++ b/gcc/ggc-page.c @@ -1080,6 +1080,18 @@ compute_inverse (order) { unsigned size, inv, e; + /* There can be only one object per "page" in a bucket for sizes + larger than half a machine page; it will always have offset zero. */ + if (OBJECT_SIZE (order) > G.pagesize/2) + { + if (OBJECTS_PER_PAGE (order) != 1) + abort (); + + DIV_MULT (order) = 1; + DIV_SHIFT (order) = 0; + return; + } + size = OBJECT_SIZE (order); e = 0; while (size % 2 == 0) |