1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s 2 3 // Basic base class test. 4 struct f0_s0 { unsigned a; }; 5 struct f0_s1 : public f0_s0 { void *b; }; 6 // CHECK-LABEL: define void @_Z2f05f0_s1(i32 %a0.coerce0, i8* %a0.coerce1) 7 void f0(f0_s1 a0) { } 8 9 // Check with two eight-bytes in base class. 10 struct f1_s0 { unsigned a; unsigned b; float c; }; 11 struct f1_s1 : public f1_s0 { float d;}; 12 // CHECK-LABEL: define void @_Z2f15f1_s1(i64 %a0.coerce0, <2 x float> %a0.coerce1) 13 void f1(f1_s1 a0) { } 14 15 // Check with two eight-bytes in base class and merge. 16 struct f2_s0 { unsigned a; unsigned b; float c; }; 17 struct f2_s1 : public f2_s0 { char d;}; 18 // CHECK-LABEL: define void @_Z2f25f2_s1(i64 %a0.coerce0, i64 %a0.coerce1) 19 void f2(f2_s1 a0) { } 20 21 // PR5831 22 // CHECK-LABEL: define void @_Z2f34s3_1(i64 %x.coerce) 23 struct s3_0 {}; 24 struct s3_1 { struct s3_0 a; long b; }; 25 void f3(struct s3_1 x) {} 26 27 // CHECK-LABEL: define i64 @_Z4f4_0M2s4i(i64 %a) 28 // CHECK: define {{.*}} @_Z4f4_1M2s4FivE(i64 %a.coerce0, i64 %a.coerce1) 29 struct s4 {}; 30 typedef int s4::* s4_mdp; 31 typedef int (s4::*s4_mfp)(); 32 s4_mdp f4_0(s4_mdp a) { return a; } 33 s4_mfp f4_1(s4_mfp a) { return a; } 34 35 // A struct with <= one eightbyte before a member data pointer should still 36 // be allowed in registers. 37 // CHECK-LABEL: define void @{{.*}}f_struct_with_mdp{{.*}}(i8* %a.coerce0, i64 %a.coerce1) 38 struct struct_with_mdp { char *a; s4_mdp b; }; 39 void f_struct_with_mdp(struct_with_mdp a) { (void)a; } 40 41 // A struct with anything before a member function will be too big and 42 // goes in memory. 43 // CHECK-LABEL: define void @{{.*}}f_struct_with_mfp_0{{.*}}(%struct{{.*}} byval align 8 %a) 44 struct struct_with_mfp_0 { char a; s4_mfp b; }; 45 void f_struct_with_mfp_0(struct_with_mfp_0 a) { (void)a; } 46 47 // CHECK-LABEL: define void @{{.*}}f_struct_with_mfp_1{{.*}}(%struct{{.*}} byval align 8 %a) 48 struct struct_with_mfp_1 { void *a; s4_mfp b; }; 49 void f_struct_with_mfp_1(struct_with_mfp_1 a) { (void)a; } 50 51 namespace PR7523 { 52 struct StringRef { 53 char *a; 54 }; 55 56 void AddKeyword(StringRef, int x); 57 58 void foo() { 59 // CHECK-LABEL: define void @_ZN6PR75233fooEv() 60 // CHECK: call void @_ZN6PR752310AddKeywordENS_9StringRefEi(i8* {{.*}}, i32 4) 61 AddKeyword(StringRef(), 4); 62 } 63 } 64 65 namespace PR7742 { // Also rdar://8250764 66 struct s2 { 67 float a[2]; 68 }; 69 70 struct c2 : public s2 {}; 71 72 // CHECK-LABEL: define <2 x float> @_ZN6PR77423fooEPNS_2c2E(%"struct.PR7742::c2"* %P) 73 c2 foo(c2 *P) { 74 return c2(); 75 } 76 77 } 78 79 namespace PR5179 { 80 struct B {}; 81 82 struct B1 : B { 83 int* pa; 84 }; 85 86 struct B2 : B { 87 B1 b1; 88 }; 89 90 // CHECK-LABEL: define i8* @_ZN6PR51793barENS_2B2E(i32* %b2.coerce) 91 const void *bar(B2 b2) { 92 return b2.b1.pa; 93 } 94 } 95 96 namespace test5 { 97 struct Xbase { }; 98 struct Empty { }; 99 struct Y; 100 struct X : public Xbase { 101 Empty empty; 102 Y f(); 103 }; 104 struct Y : public X { 105 Empty empty; 106 }; 107 X getX(); 108 int takeY(const Y&, int y); 109 void g() { 110 // rdar://8340348 - The temporary for the X object needs to have a defined 111 // address when passed into X::f as 'this'. 112 takeY(getX().f(), 42); 113 } 114 // CHECK: void @_ZN5test51gEv() 115 // CHECK: alloca %"struct.test5::Y" 116 // CHECK: alloca %"struct.test5::X" 117 // CHECK: alloca %"struct.test5::Y" 118 } 119 120 121 // rdar://8360877 122 namespace test6 { 123 struct outer { 124 int x; 125 struct epsilon_matcher {} e; 126 int f; 127 }; 128 129 int test(outer x) { 130 return x.x + x.f; 131 } 132 // CHECK-LABEL: define i32 @_ZN5test64testENS_5outerE(i64 %x.coerce0, i32 %x.coerce1) 133 } 134 135 namespace test7 { 136 struct StringRef {char* ptr; long len; }; 137 class A { public: ~A(); }; 138 A x(A, A, long, long, StringRef) { return A(); } 139 // Check that the StringRef is passed byval instead of expanded 140 // (which would split it between registers and memory). 141 // rdar://problem/9686430 142 // CHECK: define void @_ZN5test71xENS_1AES0_llNS_9StringRefE({{.*}} byval align 8) 143 144 // And a couple extra related tests: 145 A y(A, long double, long, long, StringRef) { return A(); } 146 // CHECK: define void @_ZN5test71yENS_1AEellNS_9StringRefE({{.*}} i8* 147 struct StringDouble {char * ptr; double d;}; 148 A z(A, A, A, A, A, StringDouble) { return A(); } 149 A zz(A, A, A, A, StringDouble) { return A(); } 150 // CHECK: define void @_ZN5test71zENS_1AES0_S0_S0_S0_NS_12StringDoubleE({{.*}} byval align 8) 151 // CHECK: define void @_ZN5test72zzENS_1AES0_S0_S0_NS_12StringDoubleE({{.*}} i8* 152 } 153 154 namespace test8 { 155 // CHECK: declare void @_ZN5test83fooENS_1BE(%"class.test8::B"* byval align 8) 156 class A { 157 char big[17]; 158 }; 159 160 class B : public A {}; 161 162 void foo(B b); 163 void bar() { 164 B b; 165 foo(b); 166 } 167 } 168 169 // PR4242 170 namespace test9 { 171 // Large enough to be passed indirectly. 172 struct S { void *data[3]; }; 173 174 struct T { void *data[2]; }; 175 176 // CHECK: define void @_ZN5test93fooEPNS_1SEPNS_1TE([[S:%.*]]*, [[T:%.*]]*) 177 void foo(S*, T*) {} 178 179 // CHECK: define void @_ZN5test91aEiiiiNS_1TEPv([[S]]* noalias sret {{%.*}}, i32, i32, i32, i32, [[T]]* byval align 8, i8*) 180 S a(int, int, int, int, T, void*) { 181 return S(); 182 } 183 184 // CHECK: define [[S]]* @_ZN5test91bEPNS_1SEiiiiNS_1TEPv([[S]]* {{%.*}}, i32, i32, i32, i32, [[T:%.*]]* byval align 8, i8*) 185 S* b(S* sret, int, int, int, int, T, void*) { 186 return sret; 187 } 188 189 // CHECK: define void @_ZN5test91cEiiiNS_1TEPv([[S]]* noalias sret {{%.*}}, i32, i32, i32, i8* {{%.*}}, i8* {{%.*}}, i8*) 190 S c(int, int, int, T, void*) { 191 return S(); 192 } 193 194 // CHECK: define [[S]]* @_ZN5test91dEPNS_1SEiiiNS_1TEPv([[S]]* {{%.*}}, i32, i32, i32, i8* {{%.*}}, i8* {{%.*}}, i8*) 195 S* d(S* sret, int, int, int, T, void*) { 196 return sret; 197 } 198 } 199 200 namespace test10 { 201 #pragma pack(1) 202 struct BasePacked { 203 char one; 204 short two; 205 }; 206 #pragma pack() 207 struct DerivedPacked : public BasePacked { 208 int three; 209 }; 210 // CHECK-LABEL: define i32 @_ZN6test1020FuncForDerivedPackedENS_13DerivedPackedE({{.*}}* byval align 8 211 int FuncForDerivedPacked(DerivedPacked d) { 212 return d.three; 213 } 214 } 215 216 namespace test11 { 217 union U { 218 float f1; 219 char __attribute__((__vector_size__(1))) f2; 220 }; 221 int f(union U u) { return u.f2[1]; } 222 // CHECK-LABEL: define i32 @_ZN6test111fENS_1UE(i32 223 } 224
