diff options
Diffstat (limited to 'gcc/tree-ssa-dom.c')
| -rw-r--r-- | gcc/tree-ssa-dom.c | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c index 393aa26..d2a4128 100644 --- a/gcc/tree-ssa-dom.c +++ b/gcc/tree-ssa-dom.c @@ -2687,18 +2687,13 @@ propagate_rhs_into_lhs (gimple stmt, tree lhs, tree rhs, bitmap interesting_name /* Special cases to avoid useless calls into the folding routines, operand scanning, etc. - First, propagation into a PHI may cause the PHI to become + Propagation into a PHI may cause the PHI to become a degenerate, so mark the PHI as interesting. No other - actions are necessary. - - Second, if we're propagating a virtual operand and the - propagation does not change the underlying _DECL node for - the virtual operand, then no further actions are necessary. */ - if (gimple_code (use_stmt) == GIMPLE_PHI - || (! is_gimple_reg (lhs) - && TREE_CODE (rhs) == SSA_NAME - && SSA_NAME_VAR (lhs) == SSA_NAME_VAR (rhs))) + actions are necessary. */ + if (gimple_code (use_stmt) == GIMPLE_PHI) { + tree result; + /* Dump details. */ if (dump_file && (dump_flags & TDF_DETAILS)) { @@ -2706,14 +2701,8 @@ propagate_rhs_into_lhs (gimple stmt, tree lhs, tree rhs, bitmap interesting_name print_gimple_stmt (dump_file, use_stmt, 0, dump_flags); } - /* Propagation into a PHI may expose new degenerate PHIs, - so mark the result of the PHI as interesting. */ - if (gimple_code (use_stmt) == GIMPLE_PHI) - { - tree result = get_lhs_or_phi_result (use_stmt); - bitmap_set_bit (interesting_names, SSA_NAME_VERSION (result)); - } - + result = get_lhs_or_phi_result (use_stmt); + bitmap_set_bit (interesting_names, SSA_NAME_VERSION (result)); continue; } |