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      1 // RUN: %clang_cc1 -g -emit-llvm -o - %s | FileCheck %s
      2 // The DWARF standard says the underlying data type of an enum may be
      3 // stored in an DW_AT_type entry in the enum DIE. This is useful to have
      4 // so the debugger knows about the signedness of the underlying type.
      5 
      6 typedef long NSInteger;
      7 #define NS_ENUM(_type, _name) enum _name : _type _name; enum _name : _type
      8 
      9 // Enum with no specified underlying type
     10 typedef enum {
     11   Enum0One,
     12   Enum0Two
     13 } Enum0;
     14 
     15 // Enum declared with the NS_ENUM macro
     16 typedef NS_ENUM(NSInteger, Enum1) {
     17   Enum1One = -1,
     18   Enum1Two
     19 };
     20 
     21 // Enum declared with a fixed underlying type
     22 typedef enum : NSInteger {
     23   Enum2One = -1,
     24   Enum2Two
     25 } Enum2;
     26 
     27 // Typedef and declaration separately
     28 enum : NSInteger
     29 {
     30   Enum3One = -1,
     31   Enum3Two
     32 };
     33 typedef NSInteger Enum3;
     34 
     35 int main() {
     36   Enum0 e0 = Enum0One;
     37   // CHECK: call void @llvm.dbg.declare(metadata !{{.*}}, metadata ![[ENUM0:[0-9]+]])
     38   Enum1 e1 = Enum1One;
     39   // CHECK: call void @llvm.dbg.declare(metadata !{{.*}}, metadata ![[ENUM1:[0-9]+]])
     40   Enum2 e2 = Enum2One;
     41   // CHECK: call void @llvm.dbg.declare(metadata !{{.*}}, metadata ![[ENUM2:[0-9]+]])
     42   Enum3 e3 = Enum3One;
     43   // CHECK: call void @llvm.dbg.declare(metadata !{{.*}}, metadata ![[ENUM3:[0-9]+]])
     44 
     45   // -Werror and the following line ensures that these enums are not
     46   // -treated as C++11 strongly typed enums.
     47   return e0 != e1 && e1 == e2 && e2 == e3;
     48 }
     49 // CHECK: ![[ENUMERATOR0:[0-9]+]] = {{.*}}; [ DW_TAG_enumeration_type ] [line 10
     50 // CHECK: ![[ENUMERATOR1:[0-9]+]] = {{.*}}; [ DW_TAG_enumeration_type ] [Enum1] [line 16{{.*}}] [from NSInteger]
     51 // CHECK: ![[ENUMERATOR3:[0-9]+]] = {{.*}}; [ DW_TAG_typedef ] [NSInteger] [line 6{{.*}}] [from long int]
     52 // CHECK: ![[ENUMERATOR2:[0-9]+]] = {{.*}}; [ DW_TAG_enumeration_type ] [line 22{{.*}}] [from NSInteger]
     53 
     54 // CHECK: ![[ENUM0]] = metadata !{{{.*}}!"e0", metadata !{{[0-9]+}}, i32 {{[0-9]+}}, metadata ![[TYPE0:[0-9]+]]
     55 // CHECK: ![[TYPE0]] = metadata !{{{.*}}!"Enum0", {{.*}} metadata ![[ENUMERATOR0]]} ; [ DW_TAG_typedef ] [Enum0]
     56 
     57 // CHECK: ![[ENUM1]] = metadata !{{{.*}}!"e1", metadata !{{[0-9]+}}, i32 {{[0-9]+}}, metadata ![[TYPE1:[0-9]+]]
     58 // CHECK: ![[TYPE1]] = metadata !{{{.*}}!"Enum1", {{.*}} metadata ![[ENUMERATOR1]]} ; [ DW_TAG_typedef ] [Enum1]
     59 
     60 // CHECK: ![[ENUM2]] = metadata !{{{.*}}!"e2", metadata !{{[0-9]+}}, i32 {{[0-9]+}}, metadata ![[TYPE2:[0-9]+]]
     61 // CHECK: ![[TYPE2]] = metadata !{{{.*}}!"Enum2", {{.*}} metadata ![[ENUMERATOR2]]} ; [ DW_TAG_typedef ] [Enum2]
     62 
     63 // CHECK: ![[ENUM3]] = metadata !{{{.*}}!"e3", metadata !{{[0-9]+}}, i32 {{[0-9]+}}, metadata ![[TYPE3:[0-9]+]]
     64 // CHECK: ![[TYPE3]] = metadata !{{{.*}}!"Enum3", {{.*}} metadata ![[ENUMERATOR3]]} ; [ DW_TAG_typedef ] [Enum3]
     65