From 66f2881a78b717bdb8410956ccbffb679fbccea5 Mon Sep 17 00:00:00 2001
From: gingerBill <bill@gingerbill.org>
Date: Fri, 17 Feb 2023 17:02:37 +0000
Subject: Allow comparisons between empty `struct{}` and `union{}`

---
 src/llvm_backend_expr.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'src/llvm_backend_expr.cpp')

diff --git a/src/llvm_backend_expr.cpp b/src/llvm_backend_expr.cpp
index 480831a68..5bffc7226 100644
--- a/src/llvm_backend_expr.cpp
+++ b/src/llvm_backend_expr.cpp
@@ -2210,6 +2210,15 @@ gb_internal lbValue lb_compare_records(lbProcedure *p, TokenKind op_kind, lbValu
 	lbValue left_ptr  = lb_address_from_load_or_generate_local(p, left);
 	lbValue right_ptr = lb_address_from_load_or_generate_local(p, right);
 	lbValue res = {};
+	if (type_size_of(type) == 0) {
+		switch (op_kind) {
+		case Token_CmpEq:
+			return lb_const_bool(p->module, t_bool, true);
+		case Token_NotEq:
+			return lb_const_bool(p->module, t_bool, false);
+		}
+		GB_PANIC("invalid operator");
+	}
 	if (is_type_simple_compare(type)) {
 		// TODO(bill): Test to see if this is actually faster!!!!
 		auto args = array_make<lbValue>(permanent_allocator(), 3);
-- 
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