clang/test/CodeGenCXX/template-param-objects-linkage.cpp

   1 // RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++20 %s -emit-llvm -o - | FileCheck %s
   2 // RUN: %clang_cc1 -triple x86_64-linux-gnu -std=c++20 %s -emit-llvm -o - -fexperimental-new-constant-interpreter | FileCheck %s
   3
   4 struct S { char buf[32]; };
   5 template<S s> constexpr const char* f() { return s.buf; }
   6 const char* fbuf = f<S{"a"}>();
   7 // CHECK: @_ZTAXtl1StlA32_cLc97EEEE = linkonce_odr constant { <{ i8, [31 x i8] }> }
   8
   9 namespace {
  10   struct UN { char buf[64]; };
  11 }
  12 template <UN un> constexpr const char* g() { return un.buf; }
  13 const char* gbuf = g<UN{"b"}>();
  14 // CHECK: @_ZTAXtlN12_GLOBAL__N_12UNEtlA64_cLc98EEEE = internal constant { <{ i8, [63 x i8] }> }
  15
  16 struct Foo { int *i; };
  17 int m = 0;
  18 namespace { int n; }
  19
  20 template <Foo foo>
  21 const int* h() { return foo.i; }
  22
  23 const int* hm = h<Foo{&m}>();
  24 // CHECK: @_ZTAXtl3FooadL_Z1mEEE = linkonce_odr constant %struct.Foo { ptr @m }
  25
  26 const int* hn = h<Foo{&n}>();
  27 // CHECK: @_ZTAXtl3FooadL_ZN12_GLOBAL__N_11nEEEE = internal constant %struct.Foo { ptr @_ZN12_GLOBAL__N_11nE }