1 // This test checks if C++ functions with internal linkage names are mangled
2 // and the module hash suffixes attached including emitting DW_AT_linkage_name.
3 //
4 // RUN: %clang_cc1 -triple x86_64-unknown-linux -debug-info-kind=limited -dwarf-version=4 -emit-llvm -o - %s | FileCheck %s --check-prefix=PLAIN
5 // RUN: %clang_cc1 -triple x86_64-unknown-linux -debug-info-kind=limited -dwarf-version=4 -funique-internal-linkage-names -emit-llvm -o - %s | FileCheck %s --check-prefix=UNIQUE
6 // RUN: %clang_cc1 -triple x86_64-unknown-linux -debug-info-kind=limited -dwarf-version=5 -emit-llvm -o - %s | FileCheck %s --check-prefix=PLAIN
7 // RUN: %clang_cc1 -triple x86_64-unknown-linux -debug-info-kind=limited -dwarf-version=5 -funique-internal-linkage-names -emit-llvm -o - %s | FileCheck %s --check-prefix=UNIQUE
8 
9 static int glob_foo = 5;
10 static int foo(void) {
11   __builtin_printf("%p", &glob_foo);
12   return glob_foo;
13 }
14 
15 // Anonymous namespaces generate internal linkage symbols.
16 namespace {
17   int glob_bar;
18   int bar() {
19     return glob_bar;
20   }
21 }
22 
23 extern "C" {
24   static int glob_zip;
25   static int zip(void) {
26     return glob_zip;
27   }
28 }
29 
30 void baz() {
31   foo();
32   bar();
33   zip();
34 }
35 
36 // PLAIN-DAG: @_ZL8glob_foo = internal global i32
37 // PLAIN-DAG: define internal noundef i32 @_ZL3foov()
38 // PLAIN-DAG: distinct !DIGlobalVariable(name: "glob_foo", linkageName: "_ZL8glob_foo"{{.*}})
39 // PLAIN-DAG: distinct !DISubprogram(name: "foo", linkageName: "_ZL3foov"{{.*}})
40 // PLAIN-DAG: @_ZN12_GLOBAL__N_18glob_barE = internal global i32
41 // PLAIN-DAG: define internal noundef i32 @_ZN12_GLOBAL__N_13barEv()
42 // PLAIN-DAG: distinct !DIGlobalVariable(name: "glob_bar", linkageName: "_ZN12_GLOBAL__N_18glob_barE"{{.*}})
43 // PLAIN-DAG: distinct !DISubprogram(name: "bar", linkageName: "_ZN12_GLOBAL__N_13barEv"{{.*}})
44 // PLAIN-DAG: @_ZL8glob_zip = internal global i32
45 // PLAIN-DAG: define internal noundef i32 @_ZL3zipv()
46 // PLAIN-DAG: distinct !DIGlobalVariable(name: "glob_zip", linkageName: "_ZL8glob_zip"{{.*}})
47 // PLAIN-DAG: distinct !DISubprogram(name: "zip", linkageName: "_ZL3zipv"{{.*}})
48 
49 // UNIQUE-DAG: @_ZL8glob_foo = internal global i32
50 // UNIQUE-DAG: define internal noundef i32 @_ZL3foov.[[MODHASH:__uniq\.[0-9]+]]()
51 // UNIQUE-DAG: distinct !DIGlobalVariable(name: "glob_foo", linkageName: "_ZL8glob_foo"{{.*}})
52 // UNIQUE-DAG: distinct !DISubprogram(name: "foo", linkageName: "_ZL3foov.[[MODHASH]]"{{.*}})
53 // UNIQUE-DAG: @_ZN12_GLOBAL__N_18glob_barE = internal global i32
54 // UNIQUE-DAG: define internal noundef i32 @_ZN12_GLOBAL__N_13barEv.[[MODHASH]]()
55 // UNIQUE-DAG: distinct !DIGlobalVariable(name: "glob_bar", linkageName: "_ZN12_GLOBAL__N_18glob_barE"{{.*}})
56 // UNIQUE-DAG: distinct !DISubprogram(name: "bar", linkageName: "_ZN12_GLOBAL__N_13barEv.[[MODHASH]]"{{.*}})
57 // UNIQUE-DAG: @_ZL8glob_zip = internal global i32
58 // UNIQUE-DAG: define internal noundef i32 @_ZL3zipv.[[MODHASH]]()
59 // UNIQUE-DAG: distinct !DIGlobalVariable(name: "glob_zip", linkageName: "_ZL8glob_zip"{{.*}})
60 // UNIQUE-DAG: distinct !DISubprogram(name: "zip", linkageName: "_ZL3zipv.[[MODHASH]]"{{.*}})
61