[PATCH 2/3] move gimple_canonical_types htab out of gc memory

[tsaunders]

From: Trevor Saunders <tsaund...@mozilla.com>

Hi,

The memory allocated for the hash table is never rooted by anything, so keeping
it in gc memory only works if it never needs to survive a gc.

Trev

lto/

        * lto.c (read_cgraph_and_symbols): allocate gimple_canonical_types
        htab with malloc instead of ggc.
---
 gcc/lto/lto.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/lto/lto.c b/gcc/lto/lto.c
index a1cd958..1ff02f8 100644
--- a/gcc/lto/lto.c
+++ b/gcc/lto/lto.c
@@ -2926,8 +2926,8 @@ read_cgraph_and_symbols (unsigned nfiles, const char 
**fnames)
   symtab->state = LTO_STREAMING;
 
   canonical_type_hash_cache = new hash_map<const_tree, hashval_t> (251);
-  gimple_canonical_types = htab_create_ggc (16381, gimple_canonical_type_hash,
-                                           gimple_canonical_type_eq, 0);
+  gimple_canonical_types = htab_create (16381, gimple_canonical_type_hash,
+                                       gimple_canonical_type_eq, NULL);
   gcc_obstack_init (&tree_scc_hash_obstack);
   tree_scc_hash = new hash_table<tree_scc_hasher> (4096);
 
-- 
2.1.3