diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/sparseset.c | 7 |
2 files changed, 12 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e22f508..e1e6f10 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2007-01-16 Janis Johnson <janis187@us.ibm.com> + Peter Bergner <bergner@vnet.ibm.com> + + PR rtl-optimization/33796 + * sparseset.c (sparseset_alloc): Use xcalloc rather than xmalloc. + 2008-01-16 John David Anglin <dave.anglin@nrc-cnrc.gc.ca> PR libgfortran/34699 diff --git a/gcc/sparseset.c b/gcc/sparseset.c index f556c4d..c8a9a30 100644 --- a/gcc/sparseset.c +++ b/gcc/sparseset.c @@ -30,7 +30,12 @@ sparseset_alloc (SPARSESET_ELT_TYPE n_elms) unsigned int n_bytes = sizeof (struct sparseset_def) + ((n_elms - 1) * 2 * sizeof (SPARSESET_ELT_TYPE)); - sparseset set = (sparseset) xmalloc (n_bytes); + /* We use xcalloc rather than xmalloc to silence some valgrind uninitialized + read errors when accessing set->sparse[n] when "n" is not, and never has + been, in the set. These uninitialized reads are expected, by design and + harmless. If this turns into a performance problem due to some future + additional users of sparseset, we can revisit this decision. */ + sparseset set = (sparseset) xcalloc (1, n_bytes); set->dense = &(set->elms[0]); set->sparse = &(set->elms[n_elms]); set->size = n_elms; |