1// RUN: not %clang_cc1 -verify -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s 2 3// CHECK: @a = global i32 10 4int a = 10; 5// CHECK: @ar = constant i32* @a 6int &ar = a; 7 8void f(); 9// CHECK: @fr = constant void ()* @_Z1fv 10void (&fr)() = f; 11 12struct S { int& a; }; 13// CHECK: @s = global %struct.S { i32* @a } 14S s = { a }; 15 16// PR5581 17namespace PR5581 { 18class C { 19public: 20 enum { e0, e1 }; 21 unsigned f; 22}; 23 24// CHECK: @_ZN6PR55812g0E = global %"class.PR5581::C" { i32 1 } 25C g0 = { C::e1 }; 26} 27 28namespace test2 { 29 struct A { 30 static const double d = 1.0; 31 static const float f = d / 2; 32 static int g(); 33 } a; 34 35 // CHECK: @_ZN5test22t0E = global double {{1\.0+e\+0+}}, align 8 36 // CHECK: @_ZN5test22t1E = global [2 x double] [double {{1\.0+e\+0+}}, double {{5\.0+e-0*}}1], align 16 37 // CHECK: @_ZN5test22t2E = global double* @_ZN5test21A1d 38 // CHECK: @_ZN5test22t3E = global {{.*}} @_ZN5test21A1g 39 double t0 = A::d; 40 double t1[] = { A::d, A::f }; 41 const double *t2 = &a.d; 42 int (*t3)() = &a.g; 43} 44 45// We don't expect to fold this in the frontend, but make sure it doesn't crash. 46// CHECK: @PR9558 = global float 0.000000e+0 47float PR9558 = reinterpret_cast<const float&>("asd"); 48 49// An initialized const automatic variable cannot be promoted to a constant 50// global if it has a mutable member. 51struct MutableMember { 52 mutable int n; 53}; 54int writeToMutable() { 55 // CHECK-NOT: {{.*}}MM{{.*}} = {{.*}}constant 56 const MutableMember MM = { 0 }; 57 return ++MM.n; 58} 59 60// Make sure we don't try to fold this in the frontend; the backend can't 61// handle it. 62// CHECK: @PR11705 = global i128 0 63__int128_t PR11705 = (__int128_t)&PR11705; 64 65// Make sure we don't try to fold this either. 66// CHECK: @_ZZ23UnfoldableAddrLabelDiffvE1x = internal global i128 0 67void UnfoldableAddrLabelDiff() { static __int128_t x = (long)&&a-(long)&&b; a:b:return;} 68 69// But make sure we do fold this. 70// CHECK: @_ZZ21FoldableAddrLabelDiffvE1x = internal global i64 sub (i64 ptrtoint (i8* blockaddress(@_Z21FoldableAddrLabelDiffv 71void FoldableAddrLabelDiff() { static long x = (long)&&a-(long)&&b; a:b:return;} 72 73// CHECK: @i = constant i32* bitcast (float* @PR9558 to i32*) 74int &i = reinterpret_cast<int&>(PR9558); 75 76int arr[2]; 77// CHECK: @pastEnd = constant i32* bitcast (i8* getelementptr (i8* bitcast ([2 x i32]* @arr to i8*), i64 8) to i32*) 78int &pastEnd = arr[2]; 79