clang/test/CodeGenCXX/asm.cpp

   1 // RUN: %clang_cc1 -triple i386-unknown-unknown -fblocks -emit-llvm %s -o - | FileCheck %s
   2
   3 // CHECK: %[[STRUCT_A:.*]] = type { i8 }
   4
   5 struct A
   6 {
   7     ~A();
   8 };
   9 int foo(A);
  10
  11 void bar(A &a)
  12 {
  13     // CHECK: call void asm
  14     asm("" : : "r"(foo(a)) );
  15     // CHECK: call void @_ZN1AD1Ev
  16 }
  17
  18 namespace TestTemplate {
  19 // Check that the temporary is destructed after the first asm statement.
  20
  21 // CHECK: define {{.*}}void @_ZN12TestTemplate4foo0IvEEvR1A(
  22 // CHECK: %[[AGG_TMP:.*]] = alloca %[[STRUCT_A]],
  23 // CHECK: %[[CALL:.*]] = call noundef i32 @_Z3foo1A({{.*}}%[[AGG_TMP]])
  24 // CHECK: call void asm sideeffect "", "r,~{dirflag},~{fpsr},~{flags}"(i32 %[[CALL]])
  25 // CHECK: call void @_ZN1AD1Ev({{.*}}%[[AGG_TMP]])
  26 // CHECK: call void asm sideeffect "",
  27
  28 template <class T>
  29 void foo0(A &a) {
  30   asm("" : : "r"(foo(a)) );
  31   asm("");
  32 }
  33
  34 void test0(A &a) { foo0<void>(a); }
  35
  36 // Check that the block capture is destructed at the end of the enclosing scope.
  37
  38 // CHECK: define {{.*}}void @_ZN12TestTemplate4foo1IvEEv1A(
  39 // CHECK: %[[BLOCK:.*]] = alloca <{ ptr, i32, i32, ptr, ptr, %[[STRUCT_A]] }>, align 4
  40 // CHECK: %[[BLOCK_CAPTURED:.*]] = getelementptr inbounds nuw <{ ptr, i32, i32, ptr, ptr, %[[STRUCT_A]] }>, ptr %[[BLOCK]], i32 0, i32 5
  41 // CHECK: call void asm sideeffect "", "r,~{dirflag},~{fpsr},~{flags}"(i32 %{{.*}})
  42 // CHECK: call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"()
  43 // CHECK: call void @_ZN1AD1Ev({{.*}} %[[BLOCK_CAPTURED]])
  44
  45 template <class T>
  46 void foo1(A a) {
  47   asm("" : : "r"(^{ (void)a; return 0; }()));
  48   asm("");
  49 }
  50
  51 void test1(A &a) { foo1<void>(a); }
  52 } // namespace TestTemplate