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| author | Zdenek Dvorak <dvorakz@suse.cz> | 2005-09-13 09:33:49 +0200 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2005-09-13 07:33:49 +0000 |
| commit | d7f0e25cd0e994e9f95e7709e0d6c6df587463a6 (patch) | |
| tree | f9a56ea6be2456fbafe9f55bdd37a21e1c6bb92f /gcc | |
| parent | 7823229bc310fe007b397365afe17ee5e039a3af (diff) | |
| download | gcc-d7f0e25cd0e994e9f95e7709e0d6c6df587463a6.zip gcc-d7f0e25cd0e994e9f95e7709e0d6c6df587463a6.tar.gz gcc-d7f0e25cd0e994e9f95e7709e0d6c6df587463a6.tar.bz2 | |
re PR tree-optimization/23817 (ICE in check_loop_closed_ssa_use, at tree-ssa-loop-manip.c:398)
PR tree-optimize/23817
* tree-cfg.c (tree_merge_blocks): Preserve loop closed ssa.
From-SVN: r104218
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-cfg.c | 13 |
2 files changed, 16 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0b7c8bd..e1900f9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2005-09-13 Zdenek Dvorak <dvorakz@suse.cz> + + PR tree-optimize/23817 + * tree-cfg.c (tree_merge_blocks): Preserve loop closed ssa. + 2005-09-13 Alan Modra <amodra@bigpond.net.au> PR target/23774 diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c index 75c14f4..d5d466e 100644 --- a/gcc/tree-cfg.c +++ b/gcc/tree-cfg.c @@ -1314,8 +1314,17 @@ tree_merge_blocks (basic_block a, basic_block b) { tree def = PHI_RESULT (phi), use = PHI_ARG_DEF (phi, 0); tree copy; - - if (!may_propagate_copy (def, use)) + bool may_replace_uses = may_propagate_copy (def, use); + + /* In case we have loops to care about, do not propagate arguments of + loop closed ssa phi nodes. */ + if (current_loops + && is_gimple_reg (def) + && TREE_CODE (use) == SSA_NAME + && a->loop_father != b->loop_father) + may_replace_uses = false; + + if (!may_replace_uses) { gcc_assert (is_gimple_reg (def)); |