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| author | Jan Hubicka <jh@suse.cz> | 2007-01-17 00:42:06 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2007-01-16 23:42:06 +0000 |
| commit | 109c8d3934b3748a2fdb061c9a250b30b54fdf5b (patch) | |
| tree | 021e6b777faca34f0b16334c7b7ec2720de79db4 | |
| parent | 80a3dc41f4dfaa5d940f1ade2c8cd30c00a67b89 (diff) | |
| download | gcc-109c8d3934b3748a2fdb061c9a250b30b54fdf5b.zip gcc-109c8d3934b3748a2fdb061c9a250b30b54fdf5b.tar.gz gcc-109c8d3934b3748a2fdb061c9a250b30b54fdf5b.tar.bz2 | |
tree-ssanames.c (release_dead_ssa_names): Instead of ggc_freeing the names...
* tree-ssanames.c (release_dead_ssa_names): Instead of ggc_freeing
the names, just unlink the chain so we don't crash on dangling pointers
to dead SSA names.
From-SVN: r120837
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssanames.c | 7 |
2 files changed, 12 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7d44816..a8e0c18 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2007-01-16 Jan Hubicka <jh@suse.cz> + * tree-ssanames.c (release_dead_ssa_names): Instead of ggc_freeing + the names, just unlink the chain so we don't crash on dangling pointers + to dead SSA names. + +2007-01-16 Jan Hubicka <jh@suse.cz> + * cgraph.h (cgraph_decide_inlining_incrementally): Kill. * tree-pass.h: Reorder to make IPA passes appear toegher. (pass_early_inline, pass_inline_parameters, pass_apply_inline): Declare. diff --git a/gcc/tree-ssanames.c b/gcc/tree-ssanames.c index d9ab940..07b83f8 100644 --- a/gcc/tree-ssanames.c +++ b/gcc/tree-ssanames.c @@ -325,7 +325,12 @@ release_dead_ssa_names (void) for (t = FREE_SSANAMES (cfun); t; t = next) { next = TREE_CHAIN (t); - ggc_free (t); + /* Dangling pointers might make GGC to still see dead SSA names, so it is + important to unlink the list and avoid GGC from seeing all subsequent + SSA names. In longer run we want to have all dangling pointers here + removed (since they usually go trhough dead statements that consume + considerable amounts of memory). */ + TREE_CHAIN (t) = NULL_TREE; n++; } FREE_SSANAMES (cfun) = NULL; |