clang/test/CodeGen/tbaa-struct.cpp

   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.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, ptr noundef nonnull 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.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(24) %{{.*}}, ptr noundef nonnull 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.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(12) %{{.*}}, ptr noundef nonnull 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.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(3) {{.*}}, ptr noundef nonnull 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.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(6) {{.*}}, ptr noundef nonnull 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.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, ptr noundef nonnull 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.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(16) %{{.*}}, ptr noundef nonnull 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}