clang/test/CXX/expr/p10-0x.cpp

   1 // RUN: %clang_cc1 -emit-llvm -triple x86_64-pc-linux-gnu %s -o - -std=c++11 | FileCheck %s
   2
   3 volatile int g1;
   4 struct S {
   5   volatile int a;
   6 } g2;
   7
   8 volatile int& refcall();
   9
  10 // CHECK: define{{.*}} void @_Z2f1PViPV1S
  11 void f1(volatile int *x, volatile S* s) {
  12   // We should perform the load in these cases.
  13   // CHECK: load volatile i32, ptr
  14   (*x);
  15   // CHECK: load volatile i32, ptr
  16   __extension__ g1;
  17   // CHECK: load volatile i32, ptr
  18   s->a;
  19   // CHECK: load volatile i32, ptr
  20   g2.a;
  21   // CHECK: load volatile i32, ptr
  22   s->*(&S::a);
  23   // CHECK: load volatile i32, ptr
  24   // CHECK: load volatile i32, ptr
  25   x[0], 1 ? x[0] : *x;
  26
  27   // CHECK: load volatile i32, ptr
  28   // CHECK: load volatile i32, ptr
  29   // CHECK: load volatile i32, ptr
  30   *x ?: *x;
  31
  32   // CHECK: load volatile i32, ptr
  33   ({ *x; });
  34
  35   // CHECK-NOT: load volatile
  36   // CHECK: ret
  37 }
  38
  39 // CHECK: define{{.*}} void @_Z2f2PVi
  40 // CHECK-NOT: load volatile
  41 // CHECK: ret
  42 void f2(volatile int *x) {
  43   // We shouldn't perform the load in these cases.
  44   refcall();
  45   1 ? refcall() : *x;
  46 }
  47
  48 // CHECK: define{{.*}} void @_Z2f3v()
  49 // CHECK-NOT: load
  50 // CHECK-NOT: memcpy
  51
  52 void f3(void) {
  53   volatile char a[10];
  54   a;
  55 }