From d14415a4e62cad0d87a4e6529b50d48cd160003f Mon Sep 17 00:00:00 2001
From: TermiNexus <wyt18222152539wyt@163.com>
Date: Sun, 30 Aug 2026 08:12:44 +0800
Subject: [PATCH] =?UTF-8?q?fix(compiler):=20asm=20=E7=BA=A6=E6=9D=9F?=
 =?UTF-8?q?=E6=98=A0=E5=B0=84=E8=A1=A5=E5=85=A8=208=20=E4=BD=8D=E5=AF=84?=
 =?UTF-8?q?=E5=AD=98=E5=99=A8=20clobber=EF=BC=88AL/AH/BL/BH/CL/CH/DL/DH?=
 =?UTF-8?q?=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 App/lib/core/Gen/Call/CallGenCBuiltin.vp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/App/lib/core/Gen/Call/CallGenCBuiltin.vp b/App/lib/core/Gen/Call/CallGenCBuiltin.vp
index 30df6e4..a871083 100644
--- a/App/lib/core/Gen/Call/CallGenCBuiltin.vp
+++ b/App/lib/core/Gen/Call/CallGenCBuiltin.vp
@@ -844,6 +844,17 @@ class CallGenCBuiltin(CallGenBase.CallGenBase):
         if string.strcmp(attr_name, "CLOBBER_CX") == 0:     return "cx"
         if string.strcmp(attr_name, "CLOBBER_SI") == 0:     return "si"
         if string.strcmp(attr_name, "CLOBBER_DI") == 0:     return "di"
+        # 8 位寄存器破坏描述符（对齐 t.py 标准常量集；缺 AL 曾致 AllocPage
+        # `rep stosb` 的 ~{al} 丢失——LLVM 不知 AL 被改，页地址 $0 可能被分配
+        # 进 RAX 被 mov al,0 破坏，A7 根因）
+        if string.strcmp(attr_name, "CLOBBER_AL") == 0:     return "al"
+        if string.strcmp(attr_name, "CLOBBER_AH") == 0:     return "ah"
+        if string.strcmp(attr_name, "CLOBBER_BL") == 0:     return "bl"
+        if string.strcmp(attr_name, "CLOBBER_BH") == 0:     return "bh"
+        if string.strcmp(attr_name, "CLOBBER_CL") == 0:     return "cl"
+        if string.strcmp(attr_name, "CLOBBER_CH") == 0:     return "ch"
+        if string.strcmp(attr_name, "CLOBBER_DL") == 0:     return "dl"
+        if string.strcmp(attr_name, "CLOBBER_DH") == 0:     return "dh"
 
         # Output 输出约束
         if string.strcmp(attr_name, "OUTPUT_REG") == 0: return "=r"