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

   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 -Wno-strict-prototypes -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 -Wno-strict-prototypes -debug-info-kind=limited -dwarf-version=4 -funique-internal-linkage-names -emit-llvm -o -  %s | FileCheck %s --check-prefix=UNIQUE
   6 //
   7 // RUN: %clang_cc1 -triple x86_64-unknown-linux -Wno-strict-prototypes -debug-info-kind=limited -dwarf-version=5 -emit-llvm -o -  %s | FileCheck %s --check-prefix=PLAIN
   8 // RUN: %clang_cc1 -triple x86_64-unknown-linux -Wno-strict-prototypes -debug-info-kind=limited -dwarf-version=5 -funique-internal-linkage-names -emit-llvm -o -  %s | FileCheck %s --check-prefix=UNIQUE
   9
  10 static int glob;
  11 // foo should be given a uniquefied name under -funique-internal-linkage-names.
  12 static int foo(void) {
  13   return glob;
  14 }
  15
  16 // K&R prototypes should be given uniquefied names under -funique-internal-linkage-names.
  17 static int bar(a) int a;
  18 {
  19   return glob + a;
  20 }
  21
  22 void baz(void) {
  23   foo();
  24   bar(1);
  25 }
  26
  27
  28 // PLAIN: @glob = internal global i32
  29 // PLAIN: define internal i32 @foo()
  30 // PLAIN: define internal i32 @bar(i32 noundef %a)
  31 // PLAIN: distinct !DIGlobalVariable(name: "glob"{{.*}})
  32 // PLAIN: distinct !DISubprogram(name: "foo"{{.*}})
  33 // PLAIN: distinct !DISubprogram(name: "bar"{{.*}})
  34 // PLAIN-NOT: linkageName:
  35 //
  36 // UNIQUE: @glob = internal global i32
  37 // UNIQUE: define internal i32 @_ZL3foov.[[MODHASH:__uniq.[0-9]+]]()
  38 // UNIQUE: define internal i32 @_ZL3bari.[[MODHASH]](i32 noundef %a)
  39 // UNIQUE: distinct !DIGlobalVariable(name: "glob"{{.*}})
  40 // UNIQUE: distinct !DISubprogram(name: "foo", linkageName: "_ZL3foov.[[MODHASH]]"{{.*}})
  41 // UNIQUE: distinct !DISubprogram(name: "bar", linkageName: "_ZL3bari.[[MODHASH]]"{{.*}})