1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - -O1 %s | \ 2 // RUN: FileCheck -check-prefixes=CHECK,CHECK-OLD %s 3 // RUN: %clang_cc1 -triple x86_64-apple-darwin -new-struct-path-tbaa \ 4 // RUN: -emit-llvm -o - -O1 %s | \ 5 // RUN: FileCheck -check-prefixes=CHECK,CHECK-NEW %s 6 // 7 // Check that we generate TBAA metadata for struct copies correctly. 8 9 struct A { 10 short s; 11 int i; 12 char c; 13 int j; 14 }; 15 16 typedef A __attribute__((may_alias)) AA; 17 18 void copy(A *a1, A *a2) { 19 // CHECK-LABEL: _Z4copyP1AS0_ 20 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 4 dereferenceable(16) %{{.*}}, i8* noalias align 4 dereferenceable(16) %{{.*}}, i64 16, i1 false) 21 // CHECK-OLD-SAME: !tbaa.struct [[TS:!.*]] 22 // CHECK-NEW-SAME: !tbaa [[TAG_A:![0-9]*]] 23 *a1 = *a2; 24 } 25 26 struct B { 27 char c; 28 A a; 29 int i; 30 }; 31 32 void copy2(B *b1, B *b2) { 33 // CHECK-LABEL: _Z5copy2P1BS0_ 34 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 4 dereferenceable(24) %{{.*}}, i8* noalias align 4 dereferenceable(24) %{{.*}}, i64 24, i1 false) 35 // CHECK-OLD-SAME: !tbaa.struct [[TS2:!.*]] 36 // CHECK-NEW-SAME: !tbaa [[TAG_B:![0-9]*]] 37 *b1 = *b2; 38 } 39 40 struct S { 41 _Complex char cc; 42 _Complex int ci; 43 }; 44 45 union U { 46 _Complex int ci; 47 S s; 48 }; 49 50 void copy3(U *u1, U *u2) { 51 // CHECK-LABEL: _Z5copy3P1US0_ 52 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 4 dereferenceable(12) %{{.*}}, i8* noalias align 4 dereferenceable(12) %{{.*}}, i64 12, i1 false) 53 // CHECK-OLD-SAME: !tbaa.struct [[TS3:!.*]] 54 // CHECK-NEW-SAME: !tbaa [[TAG_U:![0-9]*]] 55 *u1 = *u2; 56 } 57 58 // Make sure that zero-length bitfield works. 59 struct C { 60 char a; 61 int : 0; // Shall not be ignored; see r185018. 62 char b; 63 char c; 64 } __attribute__((ms_struct)); 65 66 void copy4(C *c1, C *c2) { 67 // CHECK-LABEL: _Z5copy4P1CS0_ 68 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 1 dereferenceable(3) {{.*}}, i8* noalias align 1 dereferenceable(3) {{.*}}, i64 3, i1 false) 69 // CHECK-OLD-SAME: !tbaa.struct [[TS4:!.*]] 70 // CHECK-NEW-SAME: !tbaa [[TAG_C:![0-9]*]] 71 *c1 = *c2; 72 } 73 74 struct D { 75 char a; 76 int : 0; 77 char b; 78 char c; 79 }; 80 81 void copy5(D *d1, D *d2) { 82 // CHECK-LABEL: _Z5copy5P1DS0_ 83 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 1 dereferenceable(6) {{.*}}, i8* noalias align 1 dereferenceable(6) {{.*}}, i64 6, i1 false) 84 // CHECK-OLD-SAME: !tbaa.struct [[TS5:!.*]] 85 // CHECK-NEW-SAME: !tbaa [[TAG_D:![0-9]*]] 86 *d1 = *d2; 87 } 88 89 void copy6(AA *a1, A *a2) { 90 // CHECK-LABEL: _Z5copy6P1AS0_ 91 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 4 dereferenceable(16) %{{.*}}, i8* noalias align 4 dereferenceable(16) %{{.*}}, i64 16, i1 false) 92 // CHECK-OLD-SAME: !tbaa.struct [[TS]] 93 // CHECK-NEW-SAME: !tbaa [[TAG_char:![0-9]*]] 94 *a1 = *a2; 95 } 96 97 void copy7(A *a1, AA *a2) { 98 // CHECK-LABEL: _Z5copy7P1AS0_ 99 // CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias align 4 dereferenceable(16) %{{.*}}, i8* noalias align 4 dereferenceable(16) %{{.*}}, i64 16, i1 false) 100 // CHECK-OLD-SAME: !tbaa.struct [[TS]] 101 // CHECK-NEW-SAME: !tbaa [[TAG_char]] 102 *a1 = *a2; 103 } 104 105 // CHECK-OLD: [[TS]] = !{i64 0, i64 2, !{{.*}}, i64 4, i64 4, !{{.*}}, i64 8, i64 1, !{{.*}}, i64 12, i64 4, !{{.*}}} 106 // CHECK-OLD: [[CHAR:!.*]] = !{!"omnipotent char", !{{.*}}} 107 // CHECK-OLD: [[TAG_INT:!.*]] = !{[[INT:!.*]], [[INT]], i64 0} 108 // CHECK-OLD: [[INT]] = !{!"int", [[CHAR]] 109 // CHECK-OLD: [[TAG_CHAR:!.*]] = !{[[CHAR]], [[CHAR]], i64 0} 110 // (offset, size) = (0,1) char; (4,2) short; (8,4) int; (12,1) char; (16,4) int; (20,4) int 111 // CHECK-OLD: [[TS2]] = !{i64 0, i64 1, !{{.*}}, i64 4, i64 2, !{{.*}}, i64 8, i64 4, !{{.*}}, i64 12, i64 1, !{{.*}}, i64 16, i64 4, {{.*}}, i64 20, i64 4, {{.*}}} 112 // (offset, size) = (0,8) char; (0,2) char; (4,8) char 113 // CHECK-OLD: [[TS3]] = !{i64 0, i64 8, !{{.*}}, i64 0, i64 2, !{{.*}}, i64 4, i64 8, !{{.*}}} 114 // CHECK-OLD: [[TS4]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 1, i64 1, [[TAG_CHAR]], i64 2, i64 1, [[TAG_CHAR]]} 115 // CHECK-OLD: [[TS5]] = !{i64 0, i64 1, [[TAG_CHAR]], i64 4, i64 1, [[TAG_CHAR]], i64 5, i64 1, [[TAG_CHAR]]} 116 117 // CHECK-NEW-DAG: [[TYPE_char:!.*]] = !{{{.*}}, i64 1, !"omnipotent char"} 118 // CHECK-NEW-DAG: [[TAG_char]] = !{[[TYPE_char]], [[TYPE_char]], i64 0, i64 0} 119 // CHECK-NEW-DAG: [[TYPE_short:!.*]] = !{[[TYPE_char]], i64 2, !"short"} 120 // CHECK-NEW-DAG: [[TYPE_int:!.*]] = !{[[TYPE_char]], i64 4, !"int"} 121 // CHECK-NEW-DAG: [[TYPE_A:!.*]] = !{[[TYPE_char]], i64 16, !"_ZTS1A", [[TYPE_short]], i64 0, i64 2, [[TYPE_int]], i64 4, i64 4, [[TYPE_char]], i64 8, i64 1, [[TYPE_int]], i64 12, i64 4} 122 // CHECK-NEW-DAG: [[TAG_A]] = !{[[TYPE_A]], [[TYPE_A]], i64 0, i64 16} 123 // CHECK-NEW-DAG: [[TYPE_B:!.*]] = !{[[TYPE_char]], i64 24, !"_ZTS1B", [[TYPE_char]], i64 0, i64 1, [[TYPE_A]], i64 4, i64 16, [[TYPE_int]], i64 20, i64 4} 124 // CHECK-NEW-DAG: [[TAG_B]] = !{[[TYPE_B]], [[TYPE_B]], i64 0, i64 24} 125 // CHECK-NEW-DAG: [[TAG_U]] = !{[[TYPE_char]], [[TYPE_char]], i64 0, i64 12} 126 // CHECK-NEW-DAG: [[TYPE_C:!.*]] = !{[[TYPE_char]], i64 3, !"_ZTS1C", [[TYPE_char]], i64 0, i64 1, [[TYPE_char]], i64 1, i64 1, [[TYPE_char]], i64 2, i64 1} 127 // CHECK-NEW-DAG: [[TAG_C]] = !{[[TYPE_C]], [[TYPE_C]], i64 0, i64 3} 128 // CHECK-NEW-DAG: [[TYPE_D:!.*]] = !{[[TYPE_char]], i64 6, !"_ZTS1D", [[TYPE_char]], i64 0, i64 1, [[TYPE_char]], i64 4, i64 1, [[TYPE_char]], i64 5, i64 1} 129 // CHECK-NEW-DAG: [[TAG_D]] = !{[[TYPE_D]], [[TYPE_D]], i64 0, i64 6} 130