clang/test/CodeGenCXX/const-init-cxx1y.cpp

   1 // RUN: %clang_cc1 -verify -triple x86_64-apple-darwin -emit-llvm -o - %s -std=c++1y | FileCheck %s
   2 // expected-no-diagnostics
   3
   4 struct A {
   5   constexpr A() : n(1) {}
   6   ~A();
   7   int n;
   8 };
   9 struct B : A {
  10   A a[3];
  11   constexpr B() {
  12     ++a[0].n;
  13     a[1].n += 2;
  14     a[2].n = n + a[1].n;
  15   }
  16 };
  17 B b;
  18
  19 // CHECK: @b ={{.*}} global {{.*}} i32 1, {{.*}} { i32 2 }, {{.*}} { i32 3 }, {{.*}} { i32 4 }
  20 // CHECK-NOT: _ZN1BC
  21
  22 namespace ModifyStaticTemporary {
  23   struct A { int &&temporary; int x; };
  24   constexpr int f(int &r) { r *= 9; return r - 12; }
  25   A a = { 6, f(a.temporary) };
  26   // CHECK: @_ZGRN21ModifyStaticTemporary1aE_ = internal global i32 54
  27   // CHECK: @_ZN21ModifyStaticTemporary1aE ={{.*}} global {{.*}} ptr @_ZGRN21ModifyStaticTemporary1aE_, i32 42
  28
  29   A b = { 7, ++b.temporary };
  30   // CHECK: @_ZGRN21ModifyStaticTemporary1bE_ = internal global i32 8
  31   // CHECK: @_ZN21ModifyStaticTemporary1bE ={{.*}} global {{.*}} ptr @_ZGRN21ModifyStaticTemporary1bE_, i32 8
  32
  33   // Can't emit all of 'c' as a constant here, so emit the initial value of
  34   // 'c.temporary', not the value as modified by the partial evaluation within
  35   // the initialization of 'c.x'.
  36   A c = { 10, (++c.temporary, b.x) };
  37   // CHECK: @_ZN21ModifyStaticTemporary1cE ={{.*}} global {{.*}} zeroinitializer
  38   // CHECK: @_ZGRN21ModifyStaticTemporary1cE_ = internal global i32 10
  39 }
  40
  41 // CHECK: @_ZGRN28VariableTemplateWithConstRef1iIvEE_ = linkonce_odr constant i32 5, align 4
  42 // CHECK: @_ZN28VariableTemplateWithConstRef3useE ={{.*}} constant ptr @_ZGRN28VariableTemplateWithConstRef1iIvEE_
  43 namespace VariableTemplateWithConstRef {
  44   template <typename T>
  45   const int &i = 5;
  46   const int &use = i<void>;
  47 }
  48
  49 // CHECK: @_ZGRN34HiddenVariableTemplateWithConstRef1iIvEE_ = linkonce_odr hidden constant i32 5, align 4
  50 // CHECK: @_ZN34HiddenVariableTemplateWithConstRef3useE ={{.*}} constant ptr @_ZGRN34HiddenVariableTemplateWithConstRef1iIvEE_
  51 namespace HiddenVariableTemplateWithConstRef {
  52   template <typename T>
  53   __attribute__((visibility("hidden"))) const int &i = 5;
  54   const int &use = i<void>;
  55 }
  56
  57 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE1_ = linkonce_odr constant i32 1
  58 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE0_ = linkonce_odr global {{.*}} { ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE1_ }
  59 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE3_ = linkonce_odr constant i32 2
  60 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE2_ = linkonce_odr global {{.*}} { ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE3_ }
  61 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE5_ = linkonce_odr constant i32 3
  62 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE4_ = linkonce_odr global {{.*}} { ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE5_ }
  63 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE7_ = linkonce_odr constant i32 4
  64 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE6_ = linkonce_odr global {{.*}} { ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE7_ }
  65 // CHECK: @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE_ = linkonce_odr global %"struct.VariableTemplateWithPack::S" { ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE0_, ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE2_, ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE4_, ptr @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE6_ }
  66 // CHECK: @_ZN24VariableTemplateWithPack1pE ={{.*}} global {{.*}} @_ZGRN24VariableTemplateWithPack1sIJLi1ELi2ELi3ELi4EEEE_
  67 namespace VariableTemplateWithPack {
  68   struct A {
  69     const int &r;
  70   };
  71   struct S {
  72     A &&a, &&b, &&c, &&d;
  73   };
  74   template <int... N>
  75   S &&s = {A{N}...};
  76   S *p = &s<1, 2, 3, 4>;
  77 }
  78
  79
  80 // CHECK: @_ZGR1z_ ={{.*}} global [2 x i32] [i32 10, i32 2]
  81 // CHECK: @z = global { ptr, i32 } { ptr @_ZGR1z_, i32 10 }
  82 typedef int v[2];
  83 struct Z { int &&x, y; };
  84 Z z = { v{1,2}[0], z.x = 10 };
  85
  86 // CHECK: @_ZGR2z2_ ={{.*}} global %struct.R { i64 10 }
  87 // @z = {{.}} global %struct.Z { ptr @_ZGR1z_, %struct.R { i64 10 } }
  88 struct R { mutable long x; };
  89 struct Z2 { const R &x, y; };
  90 Z2 z2 = { R{1}, z2.x.x = 10 };
  91
  92 // CHECK: __cxa_atexit({{.*}} @_ZN1BD1Ev, {{.*}} @b
  93
  94 // CHECK: define
  95 // CHECK-NOT: @_ZGRN21ModifyStaticTemporary1cE_
  96 // CHECK: store {{.*}} @_ZGRN21ModifyStaticTemporary1cE_, {{.*}} @_ZN21ModifyStaticTemporary1cE
  97 // CHECK: add
  98 // CHECK: store
  99 // CHECK: load {{.*}} @_ZN21ModifyStaticTemporary1bE
 100 // CHECK: store {{.*}} @_ZN21ModifyStaticTemporary1cE