From 44662c62f444fc50fe523d987199f6a10c9a693c Mon Sep 17 00:00:00 2001
From: Matthew Sotoudeh <matthew@masot.net>
Date: Sun, 30 Jul 2023 18:18:25 -0700
Subject: add support for passing through sizeof & alignofs

---
 codegen.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'codegen.c')

diff --git a/codegen.c b/codegen.c
index 7acd2c9..b56a8b9 100644
--- a/codegen.c
+++ b/codegen.c
@@ -311,6 +311,14 @@ static void gen_addr(Node *node, int to_tmp) {
 // Generate code for a given node.
 static void gen_expr(Node *node, int to_tmp) {
   emit_line(node->tok);
+  if (opt_type_builtins && (node->is_sizeof || node->is_alignof)) {
+    decltmp(node->ty, to_tmp);
+    if (node->is_sizeof)  printnoln("\tt%d = sizeof ( ", to_tmp);
+    else                  printnoln("\tt%d = alignof ( ", to_tmp);
+    print_type(node->is_sizeof);
+    println(" ) ;");
+    return;
+  }
   switch (node->kind) {
   case ND_NULL_EXPR:
     return;
-- 
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