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| author | Richard Guenther <rguenther@suse.de> | 2012-09-21 12:44:07 +0000 |
|---|---|---|
| committer | Richard Guenther <rguenther@suse.de> | 2012-09-21 12:44:07 +0000 |
| commit | e02637e9c6a7cc87b77eb3eaa47f986c0260bee7 (patch) | |
| tree | 341cbdd7ee2fc938b2fa3bacdf901ca539657dd6 /gcc/tree-ssa-pre.c | |
| parent | b7f4585a4bec339bc8d3458022f63a0d4a0798ef (diff) | |
2012-09-21 Richard Guenther <rguenther@suse.de>
PR tree-optimization/54647
* tree-ssa-pre.c (compute_avail): Do not put COND_EXPR
or VEC_COND_EXPR into EXP_GEN again.
* g++.dg/torture/pr54647.C: New testcase.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@191613 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index ab9f2f467c3..d1d97b66abe 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -3981,9 +3981,18 @@ compute_avail (void) { case VN_NARY: { + enum tree_code code = gimple_assign_rhs_code (stmt); vn_nary_op_t nary; + + /* COND_EXPR and VEC_COND_EXPR are awkward in + that they contain an embedded complex expression. + Don't even try to shove those through PRE. */ + if (code == COND_EXPR + || code == VEC_COND_EXPR) + continue; + vn_nary_op_lookup_pieces (gimple_num_ops (stmt) - 1, - gimple_assign_rhs_code (stmt), + code, gimple_expr_type (stmt), gimple_assign_rhs1_ptr (stmt), &nary); |