diff options
Diffstat (limited to 'opt.c')
-rw-r--r-- | opt.c | 8 |
1 files changed, 5 insertions, 3 deletions
@@ -595,9 +595,11 @@ static struct expr *optimize_comma_expr(const struct opt_state *state, struct ex if (expr_never_returns(lhs)) { debug_opt(state, "-O1: reachability: %e <==> %e\n", expr, lhs); return extract_child_expr(expr, &expr->lhs); - } - - if (optlevel >= 2 && lhs->pure) { + } else if ((lhs->always_true && rhs == &expr_true) + || (lhs->always_false && rhs == &expr_false)) { + debug_opt(state, "-O1: redundancy elimination: %e <==> %e\n", expr, lhs); + return extract_child_expr(expr, &expr->lhs); + } else if (optlevel >= 2 && lhs->pure) { debug_opt(state, "-O2: purity: %e <==> %e\n", expr, rhs); return extract_child_expr(expr, &expr->rhs); } |