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| author | Alexandre Oliva <aoliva@redhat.com> | 2009-11-21 05:06:24 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2009-11-21 05:06:24 +0000 |
| commit | 42a06e46ab05b7cf751579a50ee302a8ab6b9cae (patch) | |
| tree | 161f18860227e5ac9286e4688c55fcb199c6a522 /gcc/tree-ssa-dom.c | |
| parent | b70fdfe4beebbc1f82c14326ec3b6a85be0a36b3 (diff) | |
| download | gcc-42a06e46ab05b7cf751579a50ee302a8ab6b9cae.zip gcc-42a06e46ab05b7cf751579a50ee302a8ab6b9cae.tar.gz gcc-42a06e46ab05b7cf751579a50ee302a8ab6b9cae.tar.bz2 | |
tree-ssa.c (find_released_ssa_name): Handle NULL wi.
* tree-ssa.c (find_released_ssa_name): Handle NULL wi.
(insert_debug_temp_for_var_def): Handle degenerate PHI nodes.
(insert_debug_temps_for_defs): Handle PHI nodes.
* tree-ssa-dom.c (degenerate_phi_result): Don't crash on released
SSA names.
From-SVN: r154402
Diffstat (limited to 'gcc/tree-ssa-dom.c')
| -rw-r--r-- | gcc/tree-ssa-dom.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index 6e861b1..db21218 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -2398,7 +2398,14 @@ degenerate_phi_result (gimple phi) continue; else if (!val) val = arg; - else if (!operand_equal_p (arg, val, 0)) + else if (arg == val) + continue; + /* We bring in some of operand_equal_p not only to speed things + up, but also to avoid crashing when dereferencing the type of + a released SSA name. */ + else if (!arg || TREE_CODE (val) != TREE_CODE (arg) + || TREE_CODE (val) == SSA_NAME + || !operand_equal_p (arg, val, 0)) break; } return (i == gimple_phi_num_args (phi) ? val : NULL); |