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1// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -Wno-unused-value -Wcast-align -verify %s2 3// Simple casts.4void test0(char *P) {5  char *a; short *b; int *c;6 7  a = (char*) P;8  a = static_cast<char*>(P);9  a = reinterpret_cast<char*>(P);10  typedef char *CharPtr;11  a = CharPtr(P);12 13  b = (short*) P; // expected-warning {{cast from 'char *' to 'short *' increases required alignment from 1 to 2}}14  b = reinterpret_cast<short*>(P);15  typedef short *ShortPtr;16  b = ShortPtr(P); // expected-warning {{cast from 'char *' to 'ShortPtr' (aka 'short *') increases required alignment from 1 to 2}}17 18  c = (int*) P; // expected-warning {{cast from 'char *' to 'int *' increases required alignment from 1 to 4}}19  c = reinterpret_cast<int*>(P);20  typedef int *IntPtr;21  c = IntPtr(P); // expected-warning {{cast from 'char *' to 'IntPtr' (aka 'int *') increases required alignment from 1 to 4}}22}23 24// Casts from void* are a special case.25void test1(void *P) {26  char *a; short *b; int *c;27 28  a = (char*) P;29  a = static_cast<char*>(P);30  a = reinterpret_cast<char*>(P);31  typedef char *CharPtr;32  a = CharPtr(P);33 34  b = (short*) P;35  b = static_cast<short*>(P);36  b = reinterpret_cast<short*>(P);37  typedef short *ShortPtr;38  b = ShortPtr(P);39 40  c = (int*) P;41  c = static_cast<int*>(P);42  c = reinterpret_cast<int*>(P);43  typedef int *IntPtr;44  c = IntPtr(P);45}46 47template <class A> void DependentAlign() {48  alignas(A) int lut[]{};49  (long *)lut; // expected-warning {{cast from 'int *' to 'long *'}}50}51 52struct __attribute__((aligned(16))) AlignedS {53  char m[16];54};55 56struct __attribute__((aligned(16))) A {57  char m0[16];58  char m1[16];59  AlignedS *getAlignedS() {60    return (AlignedS *)m1;61  }62};63 64struct B0 {65  char m0[16];66};67 68struct B1 {69  char m0[16];70};71 72struct C {73  A &m0;74  B0 &m1;75  A m2;76};77 78struct __attribute__((aligned(16))) D0 : B0, B1 {79};80 81struct __attribute__((aligned(16))) D1 : virtual B0 {82};83 84struct B2 {85  char m0[8];86};87 88struct B3 {89  char m0[8];90};91 92struct B4 {93  char m0[8];94};95 96struct D2 : B2, B3 {97};98 99struct __attribute__((aligned(16))) D3 : B4, D2 {100};101 102struct __attribute__((aligned(16))) D4 : virtual D2 {103};104 105struct D5 : virtual D0 {106  char m0[16];107  AlignedS *get() {108    return (AlignedS *)m0; // expected-warning {{cast from 'char *' to 'AlignedS *'}}109  }110};111 112struct D6 : virtual D5 {113};114 115struct D7 : virtual D3 {116};117 118void test2(int n, A *a2) {119  __attribute__((aligned(16))) char m[sizeof(A) * 2];120  char(&m_ref)[sizeof(A) * 2] = m;121  extern char(&m_ref_noinit)[sizeof(A) * 2];122  __attribute__((aligned(16))) char vararray[10][n];123  A t0;124  B0 t1;125  C t2 = {.m0 = t0, .m1 = t1};126  __attribute__((aligned(16))) char t3[5][5][5];127  __attribute__((aligned(16))) char t4[4][16];128  D0 t5;129  D1 t6;130  D3 t7;131  D4 t8;132  D6 t9;133  __attribute__((aligned(1))) D7 t10;134 135  A *a;136  a = (A *)&m;137  a = (A *)(m + sizeof(A));138  a = (A *)(sizeof(A) + m);139  a = (A *)((sizeof(A) * 2 + m) - sizeof(A));140  a = (A *)((sizeof(A) * 2 + m) - 1); // expected-warning {{cast from 'char *' to 'A *'}}141  a = (A *)(m + 1);                   // expected-warning {{cast from 'char *' to 'A *'}}142  a = (A *)(1 + m);                   // expected-warning {{cast from 'char *' to 'A *'}}143  a = (A *)(m + n);                   // expected-warning {{cast from 'char *' to 'A *'}}144  a = (A *)&*&m[sizeof(A)];145  a = (A *)(0, 0, &m[sizeof(A)]);146  a = (A *)&(0, 0, *&m[sizeof(A)]);147  a = (A *)&m[n]; // expected-warning {{cast from 'char *' to 'A *'}}148  a = (A *)&m_ref;149  a = (A *)&m_ref_noinit;        // expected-warning {{cast from 'char (*)[64]' to 'A *'}}150  a = (A *)(&vararray[4][0]);    // expected-warning {{cast from 'char *' to 'A *'}}151  a = (A *)(a2->m0 + sizeof(A)); // expected-warning {{cast from 'char *' to 'A *'}}152  a = (A *)(&t2.m0);153  a = (A *)(&t2.m1); // expected-warning {{cast from 'B0 *' to 'A *'}}154  a = (A *)(&t2.m2);155  a = (A *)(t2.m2.m1);156  a = (A *)(&t3[3][3][0]); // expected-warning {{cast from 'char *' to 'A *'}}157  a = (A *)(&t3[2][2][4]);158  a = (A *)(&t3[0][n][0]); // expected-warning {{cast from 'char *' to 'A *'}}159  a = (A *)&t4[n][0];160  a = (A *)&t4[n][1]; // expected-warning {{cast from 'char *' to 'A *'}}161  a = (A *)(t4 + 1);162  a = (A *)(t4 + n);163  a = (A *)(static_cast<B1 *>(&t5));164  a = (A *)(&(static_cast<B1 &>(t5)));165  a = (A *)(static_cast<B0 *>(&t6)); // expected-warning {{cast from 'B0 *' to 'A *'}}166  a = (A *)(static_cast<B2 *>(&t7)); // expected-warning {{cast from 'B2 *' to 'A *'}}167  a = (A *)(static_cast<B3 *>(&t7));168  a = (A *)(static_cast<B2 *>(&t8));  // expected-warning {{cast from 'B2 *' to 'A *'}}169  a = (A *)(static_cast<B3 *>(&t8));  // expected-warning {{cast from 'B3 *' to 'A *'}}170  a = (A *)(static_cast<D5 *>(&t9));  // expected-warning {{cast from 'D5 *' to 'A *'}}171  a = (A *)(static_cast<D3 *>(&t10)); // expected-warning {{cast from 'D3 *' to 'A *'}}172}173