Implement __builtin_alloca

1 files changed, 3 insertions, 0 deletions

diff --git a/qbe.c b/qbe.c
index 7cc0719..4332b9c 100644
--- a/qbe.c
+++ b/qbe.c
@@ -830,6 +830,9 @@ funcexpr(struct function *f, struct expression *e)
 		case BUILTINVAEND:
 			/* no-op */
 			break;
+		case BUILTINALLOCA:
+			l = funcexpr(f, e->builtin.arg);
+			return funcinst(f, IALLOC16, &iptr, (struct value *[]){l});
 		default:
 			fatal("internal error: unimplemented builtin");
 		}