The following patch unbreaks PCH of the int_cst_hash_table where
we currently compute the hash mixing in the pointer value of a tree.
That for sure breaks with PCH. An easy fix is to simply use TYPE_UID
instead of htab_hash_pointer. But the hash is quite stupid at the
moment. I guess using TYPE_UID won't make it worse and it's definitely
a safe bet for branches?
Bootstrap / regtest pending on x86_64-unknown-linux-gnu.
Any comments?
Thanks,
Richard.
2014-12-01 Richard Biener <rguent...@suse.de>
PR middle-end/64111
* tree.c (int_cst_hasher::hash): Use TYPE_UID instead of
htab_hash_pointer to not break PCH.
Index: gcc/tree.c
===================================================================
--- gcc/tree.c (revision 218200)
+++ gcc/tree.c (working copy)
@@ -1303,7 +1303,7 @@ hashval_t
int_cst_hasher::hash (tree x)
{
const_tree const t = x;
- hashval_t code = htab_hash_pointer (TREE_TYPE (t));
+ hashval_t code = TYPE_UID (TREE_TYPE (t));
int i;
for (i = 0; i < TREE_INT_CST_NUNITS (t); i++)
