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