From: Fanbo Meng <fanbo.meng@ibm.com>
Date: Mon, 29 Mar 2021 16:06:12 +0000 (-0400)
Subject: [SystemZ][z/OS] Add test of leading zero length bitfield in const/volatile struct
X-Git-Tag: llvmorg-14-init~11026
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f1e0c7fdd72026f62e2c38ee249705fbb9213a30;p=platform%2Fupstream%2Fllvm.git

[SystemZ][z/OS] Add test of leading zero length bitfield in const/volatile struct

Reviewed By: abhina.sreeskantharajan

Differential Revision: https://reviews.llvm.org/D99508
---

diff --git a/clang/test/CodeGen/SystemZ/zos-alignment.c b/clang/test/CodeGen/SystemZ/zos-alignment.c
index 9371a54..b439684 100644
--- a/clang/test/CodeGen/SystemZ/zos-alignment.c
+++ b/clang/test/CodeGen/SystemZ/zos-alignment.c
@@ -12,6 +12,24 @@ int f0() { return v0 + v1 + v2 + v3; }
 // DECL-NEXT: @v2 {{.*}} align 16
 // DECL-NEXT: @v3 {{.*}} align 32
 
+const struct cs0 {
+  unsigned long   :0;
+  long long        a;
+} CS0 = {};
+// CHECK:              0 | struct cs0
+// CHECK-NEXT:       0:- |   unsigned long
+// CHECK-NEXT:         0 |   long long a
+// CHECK-NEXT:           | [sizeof=8, align=8]
+
+volatile struct vs0 {
+  long            :0;
+  short           a;
+} VS0;
+// CHECK:              0 | struct vs0
+// CHECK-NEXT:       0:- |   long
+// CHECK-NEXT:         0 |   short a
+// CHECK-NEXT:           | [sizeof=2, align=2]
+
 struct s0 {
   short a:3;
   long b:5;