diff options
| author | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-08-24 03:20:33 +0000 |
|---|---|---|
| committer | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-08-24 03:20:33 +0000 |
| commit | ff34fd942ee0488bb75c9515f8e69ca26684d7c5 (patch) | |
| tree | a77c2142c30ef92cd834b61d17ae51d942b6fc8d /gcc | |
| parent | 077ce9785f3a56d7447f04aba890c912be2faf21 (diff) | |
| download | gcc-ff34fd942ee0488bb75c9515f8e69ca26684d7c5.tar.gz | |
* ggc-page.c (compute_inverse): Short circuit calculation for
object sizes larger than half a page.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@56548 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -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 05a7437360a..3cf590b0ebb 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 af3af1ab0bb..294bdfc49e4 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) |