clang/test/CodeGen/fake-use-noreturn.cpp

   1 // RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -fextend-variable-liveness -o - | FileCheck %s
   2 //
   3 // Check we can correctly produce fake uses for function-level variables even
   4 // when we have a return in a nested conditional and there is no code at the end
   5 // of the function.
   6
   7 // CHECK-LABEL: define{{.*}}@_Z3fooi
   8 // CHECK:         [[I_FAKE_USE:%[a-zA-Z0-9\.]+]] = load i32, ptr %i.addr
   9 // CHECK:         call void (...) @llvm.fake.use(i32 [[I_FAKE_USE]])
  10 // CHECK-LABEL: define{{.*}}@_ZN1C3barEi
  11 // CHECK:         [[J_FAKE_USE:%[a-zA-Z0-9\.]+]] = load i32, ptr %j.addr
  12 // CHECK:         call void (...) @llvm.fake.use(i32 [[J_FAKE_USE]])
  13
  14 void foo(int i) {
  15    while (0)
  16      if (1)
  17        return;
  18 }
  19
  20 class C {
  21   void bar(int j);
  22 };
  23
  24 void C::bar(int j) {
  25   while (0)
  26     if (1)
  27       return;
  28 }