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[PATCH PR48689] ICE in fold-const.c:13798 with fold checking
- From: Tom de Vries <vries at codesourcery dot com>
- To: Richard Guenther <richard dot guenther at gmail dot com>
- Cc: gcc-patches at gcc dot gnu dot org, Nathan Froyd <froydnj at codesourcery dot com>
- Date: Sun, 22 May 2011 18:26:06 +0200
- Subject: [PATCH PR48689] ICE in fold-const.c:13798 with fold checking
Hi,
I also ran into this assert:
...
<built-in>:0:0: internal compiler error: tree check: expected tree that
contains 'common' structure, have 'integer_cst' in fold_checksum_tree, at
fold-const.c:13798
...
With a recent change in r172386, using a TREE_CHAIN on an INTEGER_CST has become
illegal:
...
* tree.h (struct tree_int_cst, struct real_value): Include tree_typed
instead of tree_common.
* tree.c (initialize_tree_contains_struct): Mark such nodes as being
TS_TYPED rather than TS_COMMON.
...
I fixed it by guarding the use of TREE_CHAIN with CODE_CONTAINS_STRUCT
(TS_COMMON), to make sure that the tree has a TREE_CHAIN field.
Tested with --enable-checking=all build.
Ok for trunk?
Thanks,
- Tom
2011-05-22 Tom de Vries <tom@codesourcery.com>
PR middle-end/48689
* fold-const.c (fold_checksum_tree): Guard TREE_CHAIN use with
CODE_CONTAINS_STRUCT (TS_COMMON).
Index: gcc/fold-const.c
===================================================================
--- gcc/fold-const.c (revision 173734)
+++ gcc/fold-const.c (working copy)
@@ -13822,7 +13823,8 @@ recursive_label:
if (TREE_CODE_CLASS (code) != tcc_type
&& TREE_CODE_CLASS (code) != tcc_declaration
&& code != TREE_LIST
- && code != SSA_NAME)
+ && code != SSA_NAME
+ && CODE_CONTAINS_STRUCT (code, TS_COMMON))
fold_checksum_tree (TREE_CHAIN (expr), ctx, ht);
switch (TREE_CODE_CLASS (code))
{