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252
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1 // RUN: rm -rf %t
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2 // RUN: mkdir -p %t
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3 // RUN: split-file %s %t
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4 //
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5 // RUN: %clang_cc1 -std=c++20 -fmodules -fmodules-cache-path=%t -fmodule-map-file=%t/module.modulemap %t/use.cpp -emit-llvm -o - -triple x86_64-linux-gnu | FileCheck %s
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6 // RUN: %clang_cc1 -DDEFINE_LOCALLY -std=c++20 -fmodules -fmodules-cache-path=%t -fmodule-map-file=%t/module.modulemap %t/use.cpp -emit-llvm -o - -triple x86_64-linux-gnu | FileCheck %s
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7
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8 //--- module.modulemap
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9 module a { header "a.h" export * }
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10 module b { header "b.h" export * }
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11 module c { header "c.h" export * }
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12
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13 //--- nonmodular.h
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14 void not_constant();
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15
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16 template<typename T> struct A {
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17 template<T M> static inline T N = [] { not_constant(); return M; } ();
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18 };
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19
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20 template<typename T, T M> inline T N = [] { not_constant(); return M; } ();
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21
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22 template<typename T, T M> inline auto L = [] {};
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23
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24 template<typename T> int Z;
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25
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26 // These lambdas should not be merged, despite having the same context decl and
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27 // mangling number (but different signatures).
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28 inline auto MultipleLambdas = ((void)[](int*) { return 1; }, [] { return 2; });
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29
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30 //--- a.h
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31 #include "nonmodular.h"
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32
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33 //--- b.h
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34 #include "a.h"
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35
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36 int b1() { return A<int>::N<1>; }
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37 int b2() { return N<int, 1>; }
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38
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39 inline auto x1 = L<int, 1>;
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40 inline auto x2 = L<int, 2>;
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41
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42 inline constexpr int *P = &Z<decltype([] { static int n; return &n; }())>;
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43 inline constexpr int *xP = P;
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44
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45 static_assert(!__is_same(decltype(x1), decltype(x2)));
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46
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47 //--- c.h
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48 #include "a.h"
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49
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50 int c1() { return A<int>::N<2>; }
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51 int c2() { return N<int, 2>; }
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52
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53 inline auto y2 = L<int, 2>;
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54 inline auto y1 = L<int, 1>;
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55
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56 inline constexpr int *P = &Z<decltype([] { static int n; return &n; }())>;
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57 inline constexpr int *yP = P;
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58
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59 //--- use.cpp
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60 #ifdef DEFINE_LOCALLY
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61 #include "nonmodular.h"
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62
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63 inline constexpr int *P = &Z<decltype([] { static int n; return &n; }())>;
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64 inline constexpr int *zP = P;
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65
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66 auto z0 = L<int, 0>;
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67 auto z2 = L<int, 2>;
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68 auto z1 = L<int, 1>;
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69 #endif
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70
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71 #include "b.h"
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72 #include "c.h"
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73
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74 int b1v = b1();
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75 int b2v = b2();
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76 int c1v = c1();
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77 int c2v = c2();
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78
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79 // We should merge together matching lambdas.
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80 static_assert(__is_same(decltype(x1), decltype(y1)));
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81 static_assert(__is_same(decltype(x2), decltype(y2)));
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82 static_assert(!__is_same(decltype(x1), decltype(x2)));
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83 static_assert(!__is_same(decltype(y1), decltype(y2)));
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84 static_assert(!__is_same(decltype(x1), decltype(y2)));
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85 static_assert(!__is_same(decltype(x2), decltype(y1)));
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86 static_assert(xP == yP);
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87 #ifdef DEFINE_LOCALLY
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88 static_assert(!__is_same(decltype(x1), decltype(z0)));
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89 static_assert(!__is_same(decltype(x2), decltype(z0)));
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90 static_assert(__is_same(decltype(x1), decltype(z1)));
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91 static_assert(__is_same(decltype(x2), decltype(z2)));
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92 static_assert(xP == zP);
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93 #endif
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94
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95 static_assert(MultipleLambdas() == 2);
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96
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97 // We should not merge the instantiated lambdas from `b.h` and `c.h` together,
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98 // even though they will both have anonymous declaration number #1 within
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99 // A<int> and within the TU, respectively.
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100
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101 // CHECK-LABEL: define {{.*}}global_var_init{{.*}} comdat($_Z1NIiLi1EE) {
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102 // CHECK: load i8, ptr @_ZGV1NIiLi1EE, align 8
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103 // CHECK: call {{.*}} i32 @_ZNK1NIiLi1EEMUlvE_clEv(
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104 // CHECK: store i32 {{.*}}, ptr @_Z1NIiLi1EE
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105
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106 // CHECK-LABEL: define {{.*}}global_var_init{{.*}} comdat($_ZN1AIiE1NILi1EEE) {
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107 // CHECK: load i8, ptr @_ZGVN1AIiE1NILi1EEE, align 8
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108 // CHECK: call {{.*}} i32 @_ZNK1AIiE1NILi1EEMUlvE_clEv(
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109 // CHECK: store i32 {{.*}}, ptr @_ZN1AIiE1NILi1EEE
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110
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111 // CHECK-LABEL: define {{.*}}global_var_init{{.*}} comdat($_Z1NIiLi2EE) {
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112 // CHECK: load i8, ptr @_ZGV1NIiLi2EE, align 8
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113 // CHECK: call {{.*}} i32 @_ZNK1NIiLi2EEMUlvE_clEv(
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114 // CHECK: store i32 {{.*}}, ptr @_Z1NIiLi2EE
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115
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116 // CHECK-LABEL: define {{.*}}global_var_init{{.*}} comdat($_ZN1AIiE1NILi2EEE) {
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117 // CHECK: load i8, ptr @_ZGVN1AIiE1NILi2EEE, align 8
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118 // CHECK: call {{.*}} i32 @_ZNK1AIiE1NILi2EEMUlvE_clEv(
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119 // CHECK: store i32 {{.*}}, ptr @_ZN1AIiE1NILi2EEE
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120
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