From 8f81060859c6719281499d1f5717fc576256ab9a Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Sun, 14 Sep 2025 23:48:23 +0200
Subject: fix signed bitfield errata

---
 c.c          | 4 ++--
 test/test4.c | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/c.c b/c.c
index aa9c024..ef4a7a1 100644
--- a/c.c
+++ b/c.c
@@ -2710,10 +2710,10 @@ getbits(struct function *fn, const union type ty, union ref addr, uint off, int
       }
    } else {
       /* shift left and shift right arithmetic to propagate sign bit */
-      int sh = 8*typesize(ty) - bitsiz - bitoff;
+      int sh = 8*cls2siz[k] - bitsiz - bitoff;
       if (sh)
          tmp = addinstr(fn, mkinstr(Oshl, k, .l = tmp, .r = mkintcon(KI4, sh)));
-      sh = 8*typesize(ty) - sh + bitoff;
+      sh = 8*cls2siz[k] - sh + bitoff;
       if (sh)
          tmp = addinstr(fn, mkinstr(Osar, k, .l = tmp, .r = mkintcon(KI4, sh)));
    }
diff --git a/test/test4.c b/test/test4.c
index 12d9ca4..c2dcd5f 100644
--- a/test/test4.c
+++ b/test/test4.c
@@ -14,8 +14,8 @@ int : 0;
    short a:15;
 };
 
-int bitf(struct foo q) {
-   return q.x + q.y - q.k + q.a;
+int bitf(struct foo *q) {
+   return q->x + q->y - q->k + q->a;
 }
 
 int main() {
-- 
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