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| author | Richard Guenther <rguenther@suse.de> | 2008-11-02 13:34:58 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2008-11-02 13:34:58 +0000 |
| commit | 8495c94f4981e8018b6da421e1e25b82ebdde91e (patch) | |
| tree | 8c0e73b01869af871ad88b8619d5546944121409 /gcc/tree-ssa-sccvn.c | |
| parent | 99f9aa7b91375574fce9390624b55fcae66c9f38 (diff) | |
| download | gcc-8495c94f4981e8018b6da421e1e25b82ebdde91e.zip gcc-8495c94f4981e8018b6da421e1e25b82ebdde91e.tar.gz gcc-8495c94f4981e8018b6da421e1e25b82ebdde91e.tar.bz2 | |
re PR tree-optimization/37991 (excessive memory consumption - possible hang)
2008-11-02 Richard Guenther <rguenther@suse.de>
PR tree-optimization/37991
* tree-ssa-sccvn.h (copy_vuses_from_stmt): Remove.
* tree-ssa-sccvn.c (copy_vuses_from_stmt): Make static.
(set_ssa_val_to): Print if the value changed.
(simplify_binary_expression): Strip useless conversions.
* gcc.c-torture/compile/pr37991.c: New testcase.
From-SVN: r141532
Diffstat (limited to 'gcc/tree-ssa-sccvn.c')
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 082a278..e255411 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -498,7 +498,7 @@ vuses_to_vec (gimple stmt, VEC (tree, gc) **result) /* Copy the VUSE names in STMT into a vector, and return the vector. */ -VEC (tree, gc) * +static VEC (tree, gc) * copy_vuses_from_stmt (gimple stmt) { VEC (tree, gc) *vuses = NULL; @@ -1579,7 +1579,6 @@ set_ssa_val_to (tree from, tree to) print_generic_expr (dump_file, from, 0); fprintf (dump_file, " to "); print_generic_expr (dump_file, to, 0); - fprintf (dump_file, "\n"); } currval = SSA_VAL (from); @@ -1587,8 +1586,12 @@ set_ssa_val_to (tree from, tree to) if (currval != to && !operand_equal_p (currval, to, OEP_PURE_SAME)) { SSA_VAL (from) = to; + if (dump_file && (dump_flags & TDF_DETAILS)) + fprintf (dump_file, " (changed)\n"); return true; } + if (dump_file && (dump_flags & TDF_DETAILS)) + fprintf (dump_file, "\n"); return false; } @@ -2113,6 +2116,8 @@ simplify_binary_expression (gimple stmt) result = fold_binary (gimple_assign_rhs_code (stmt), TREE_TYPE (gimple_get_lhs (stmt)), op0, op1); + if (result) + STRIP_USELESS_TYPE_CONVERSION (result); fold_undefer_overflow_warnings (result && valid_gimple_rhs_p (result), stmt, 0); |