From 992873f1a51847bd7e80e172e1a46c95c559177d Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Thu, 25 Apr 2019 13:03:42 -0700
Subject: qbe: Error out when va_arg is called with non-scalar type

---
 qbe.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/qbe.c b/qbe.c
index 379d6d4..c69d875 100644
--- a/qbe.c
+++ b/qbe.c
@@ -883,6 +883,9 @@ funcexpr(struct func *f, struct expr *e)
 			funcinst(f, IVASTART, NULL, l);
 			break;
 		case BUILTINVAARG:
+			/* https://todo.sr.ht/~mcf/cc-issues/52 */
+			if (!(e->type->prop & PROPSCALAR))
+				error(&tok.loc, "va_arg with non-scalar type is not yet supported");
 			l = funcexpr(f, e->base);
 			return funcinst(f, IVAARG, e->type->repr, l);
 		case BUILTINVAEND:
-- 
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