From a037fc8da13c5bfc53a322efb0f4349b9f04a1d1 Mon Sep 17 00:00:00 2001
From: v420v <ibuki420v@gmail.com>
Date: Mon, 28 Oct 2024 00:23:05 +0900
Subject: [PATCH] codegen: fix variadic argument handling

---
 src/codegen/codegen.ibu | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/codegen/codegen.ibu b/src/codegen/codegen.ibu
index 5aff5cc..09daca3 100644
--- a/src/codegen/codegen.ibu
+++ b/src/codegen/codegen.ibu
@@ -139,14 +139,14 @@ func func_call_args_to_stack(g *Gen, args *Vec, ty *Type) i32 {
         gen_push(g, "%rax");
         stack = stack + 8;
 
-        if ty.is_variadic && i-1 == (ty.params.len - 2 - 1) {
+        if ty.is_variadic && i == (ty.params.len - 2) {
             let argc i32 = 0;
             if args.len > (ty.params.len - 2) {
                 argc = args.len - (ty.params.len - 2);
             }
-            printf("\tleaq (%%rsp), %%rax\n");
+            printf("\tleaq (%%rsp), %%rax\n"); // push argv
             gen_push(g, "%rax");
-            gen_push_num(g, argc);
+            gen_push_num(g, argc); // push argc
             stack = stack + 16;
         }