clang/test/CodeGenCXX/ms-inline-asm-fields.cpp

   1 // REQUIRES: x86-registered-target
   2 // RUN: %clang_cc1 %s -triple i386-apple-darwin10 -fasm-blocks -emit-llvm -o - | FileCheck %s
   3
   4 struct A {
   5   int a1;
   6   int a2;
   7   struct B {
   8     int b1;
   9     int b2;
  10   } a3;
  11 };
  12
  13 namespace asdf {
  14 A a_global;
  15 }
  16
  17 extern "C" int test_param_field(A p) {
  18 // CHECK: define{{.*}} i32 @test_param_field(ptr noundef byval(%struct.A) align 4 %p)
  19 // CHECK: getelementptr inbounds nuw %struct.A, ptr %p, i32 0, i32 0
  20 // CHECK: call i32 asm sideeffect inteldialect "mov eax, $1"
  21 // CHECK: ret i32
  22   __asm mov eax, p.a1
  23 }
  24
  25 extern "C" int test_namespace_global() {
  26 // CHECK: define{{.*}} i32 @test_namespace_global()
  27 // CHECK: call i32 asm sideeffect inteldialect "mov eax, $1", "{{.*}}"(ptr elementtype(i32) getelementptr inbounds nuw (%"struct.A::B", ptr getelementptr inbounds nuw (%struct.A, ptr @_ZN4asdf8a_globalE, i32 0, i32 2), i32 0, i32 1))
  28 // CHECK: ret i32
  29   __asm mov eax, asdf::a_global.a3.b2
  30 }
  31
  32 template <bool Signed>
  33 struct make_storage_type {
  34   struct type {
  35     struct B {
  36       int a;
  37       int x;
  38     } b;
  39   };
  40 };
  41
  42 template <bool Signed>
  43 struct msvc_dcas_x86 {
  44   typedef typename make_storage_type<Signed>::type storage_type;
  45   void store() __asm("PR26001") {
  46     storage_type p;
  47     __asm mov edx, p.b.x;
  48   }
  49 };
  50
  51 template void msvc_dcas_x86<false>::store();
  52 // CHECK: define weak_odr void @"\01PR26001"(
  53 // CHECK: %[[P:.*]] = alloca %"struct.make_storage_type<false>::type", align 4
  54 // CHECK: %[[B:.*]] = getelementptr inbounds nuw %"struct.make_storage_type<false>::type", ptr %[[P]], i32 0, i32 0
  55 // CHECK: %[[X:.*]] = getelementptr inbounds nuw %"struct.make_storage_type<false>::type::B", ptr %[[B]], i32 0, i32 1
  56 // CHECK: call void asm sideeffect inteldialect "mov edx, $0", "*m,~{edx},~{dirflag},~{fpsr},~{flags}"(ptr elementtype(i32) %[[X]])