clang/test/CodeGen/tbaa-reference.cpp

   1 // RUN: %clang_cc1 -triple x86_64-linux -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck %s  -check-prefixes=CHECK,OLD-PATH
   2 // RUN: %clang_cc1 -triple x86_64-linux -O1 -disable-llvm-passes %s -emit-llvm -new-struct-path-tbaa -o - | FileCheck %s -check-prefixes=CHECK,NEW-PATH
   3 //
   4 // Check that we generate correct TBAA information for reference accesses.
   5
   6 struct S;
   7
   8 struct B {
   9   S &s;
  10   B(S &s);
  11   S &get();
  12 };
  13
  14 B::B(S &s) : s(s) {
  15 // CHECK-LABEL: _ZN1BC2ER1S
  16 // Check initialization of the reference parameter.
  17 // CHECK: store ptr {{.*}}, ptr {{.*}}, !tbaa [[TAG_pointer:!.*]]
  18
  19 // Check loading of the reference parameter.
  20 // CHECK: load ptr, ptr {{.*}}, !tbaa [[TAG_pointer]]
  21
  22 // Check initialization of the reference member.
  23 // CHECK: store ptr {{.*}}, ptr {{.*}}, !tbaa [[TAG_pointer]]
  24 }
  25
  26 S &B::get() {
  27 // CHECK-LABEL: _ZN1B3getEv
  28 // Check that we access the reference as a structure member.
  29 // CHECK: load ptr, ptr {{.*}}, !tbaa [[TAG_B_s:!.*]]
  30   return s;
  31 }
  32
  33 // OLD-PATH-DAG: [[TAG_pointer]] = !{[[TYPE_pointer:!.*]], [[TYPE_pointer]], i64 0}
  34 // OLD-PATH-DAG: [[TAG_B_s]] = !{[[TYPE_B:!.*]], [[TYPE_pointer]], i64 0}
  35 //
  36 // OLD-PATH-DAG: [[TYPE_B]] = !{!"_ZTS1B", [[TYPE_pointer]], i64 0}
  37 // OLD-PATH-DAG: [[TYPE_pointer]] = !{!"any pointer", [[TYPE_char:!.*]], i64 0}
  38 // OLD-PATH-DAG: [[TYPE_char]] = !{!"omnipotent char", {{!.*}}, i64 0}
  39
  40 // NEW-PATH-DAG: [[TAG_pointer]] = !{[[TYPE_pointer:!.*]], [[TYPE_pointer]], i64 0, i64 8}
  41 // NEW-PATH-DAG: [[TAG_B_s]] = !{[[TYPE_B:!.*]], [[TYPE_pointer]], i64 0, i64 8}
  42 //
  43 // NEW-PATH-DAG: [[TYPE_B]] = !{[[TYPE_char:!.*]], i64 8, !"_ZTS1B", [[TYPE_pointer]], i64 0, i64 8}
  44 // NEW-PATH-DAG: [[TYPE_pointer]] = !{[[TYPE_char:!.*]], i64 8, !"any pointer"}
  45 // NEW-PATH-DAG: [[TYPE_char]] = !{{{!.*}}, i64 1, !"omnipotent char"}