clang/test/CodeGen/unique-internal-linkage-names-dwarf.cpp

   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]]"{{.*}})