Add a testcase for bitfield debug info.

llvm-svn: 240833

diff --git a/clang/test/CodeGen/debug-info-packed-struct.c b/clang/test/CodeGen/debug-info-packed-struct.c
new file mode 100644 (file)
index 0000000..0b5226b
--- /dev/null
+++ b/clang/test/CodeGen/debug-info-packed-struct.c
@@ -0,0 +1,91 @@
+// RUN: %clang_cc1 -x c -g -emit-llvm -triple x86_64-apple-darwin -o - %s | FileCheck %s
+
+// CHECK: %struct.layout0 = type { i8, %struct.size8, i8 }
+// CHECK: %struct.layout1 = type <{ i8, %struct.size8_anon, i8, [2 x i8] }>
+// CHECK: %struct.layout2 = type <{ i8, %struct.size8_pack1, i8 }>
+// CHECK: %struct.layout3 = type <{ i8, [3 x i8], %struct.size8_pack4, i8, [3 x i8] }>
+
+// ---------------------------------------------------------------------
+// Not packed.
+// ---------------------------------------------------------------------
+struct size8 {
+  int i : 4;
+  long long l : 60;
+};
+struct layout0 {
+  char l0_ofs0;
+  struct size8 l0_ofs8;
+  int l0_ofs16 : 1;
+};
+// CHECK: l0_ofs0
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l0_ofs8",
+// CHECK-SAME:     {{.*}}size: 64, align: 64, offset: 64)
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l0_ofs16",
+// CHECK-SAME:     {{.*}}size: 1, align: 32, offset: 128)
+
+
+// ---------------------------------------------------------------------
+// Implicitly packed.
+// ---------------------------------------------------------------------
+struct size8_anon {
+  int : 4;
+  long long : 60;
+};
+struct layout1 {
+  char l1_ofs0;
+  struct size8_anon l1_ofs1;
+  int l1_ofs9 : 1;
+};
+// CHECK: l1_ofs0
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l1_ofs1",
+// CHECK-SAME:     {{.*}}size: 64, align: 8, offset: 8)
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l1_ofs9",
+// CHECK-SAME:     {{.*}}size: 1, align: 32, offset: 72)
+
+
+// ---------------------------------------------------------------------
+// Explicitly packed.
+// ---------------------------------------------------------------------
+#pragma pack(1)
+struct size8_pack1 {
+  int i : 4;
+  long long l : 60;
+};
+struct layout2 {
+  char l2_ofs0;
+  struct size8_pack1 l2_ofs1;
+  int l2_ofs9 : 1;
+};
+#pragma pack()
+// CHECK: l2_ofs0
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l2_ofs1",
+// CHECK-SAME:     {{.*}}size: 64, align: 8, offset: 8)
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l2_ofs9",
+// CHECK-SAME:     {{.*}}size: 1, align: 32, offset: 72)
+
+
+
+// ---------------------------------------------------------------------
+// Explicitly packed with different alignment.
+// ---------------------------------------------------------------------
+#pragma pack(4)
+struct size8_pack4 {
+  int i : 4;
+  long long l : 60;
+};
+struct layout3 {
+  char l3_ofs0;
+  struct size8_pack4 l3_ofs4;
+  int l3_ofs12 : 1;
+};
+#pragma pack()
+// CHECK: l3_ofs0
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l3_ofs4",
+// CHECK-SAME:     {{.*}}size: 64, align: 32, offset: 32)
+// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "l3_ofs12",
+// CHECK-SAME:     {{.*}}size: 1, align: 32, offset: 96)
+
+struct layout0 l0;
+struct layout1 l1;
+struct layout2 l2;
+struct layout3 l3;