From 9963610b308bbf79e0f2e0f3e0c1af1b7bc40b1b Mon Sep 17 00:00:00 2001
From: WormHeamer
Date: Tue, 5 Aug 2025 01:47:10 -0400
Subject: convert divisions to right-shifts

---
 ir.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ir.c b/ir.c
index c0de33c..e52e0b9 100644
--- a/ir.c
+++ b/ir.c
@@ -568,6 +568,12 @@ Node *node_idealize(Node *n, Proc *p, Lexer *l) {
 		if (node_eql_i64(CDR(n), 0)) {
 		       lex_error_at(l, CDR(n)->src_pos, LE_ERROR, S("divisor always evaluates to zero"));
 		}
+		{
+			int po2;
+			if (T(CDR(n), N_LIT) && CDR(n)->val.type.t == T_INT && (po2 = u64_power_of_2(CDR(n)->val.u))) {;
+				return NODE(N_OP_SHR, CAR(n), node_new_lit_i64(p, po2));
+			}
+		}
 		break;
 	case N_OP_OR:
 		if (same) return CAR(n);
-- 
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