111 lines · c
1// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -Wcast-qual -verify %s2// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -Wcast-qual -verify %s -fexperimental-new-constant-interpreter3// RUN: %clang_cc1 -triple x86_64-unknown-unknown -x c++ -fsyntax-only -Wcast-qual -verify %s -fexperimental-new-constant-interpreter4 5#include <stdint.h>6 7void foo(void) {8 const char *const ptr = 0;9 const char *const *ptrptr = 0;10 char *const *ptrcptr = 0;11 char **ptrptr2 = 0;12 char *y = (char *)ptr; // expected-warning {{cast from 'const char *' to 'char *' drops const qualifier}}13 char **y1 = (char **)ptrptr; // expected-warning {{cast from 'const char *const *' to 'char **' drops const qualifier}}14 const char **y2 = (const char **)ptrptr; // expected-warning {{cast from 'const char *const *' to 'const char **' drops const qualifier}}15 char *const *y3 = (char *const *)ptrptr; // expected-warning {{cast from 'const char *const' to 'char *const' drops const qualifier}}16 const char **y4 = (const char **)ptrcptr; // expected-warning {{cast from 'char *const *' to 'const char **' drops const qualifier}}17 18 char *z = (char *)(uintptr_t)(const void *)ptr; // no warning19 char *z1 = (char *)(const void *)ptr; // expected-warning {{cast from 'const void *' to 'char *' drops const qualifier}}20 21 volatile char *vol = 0;22 char *vol2 = (char *)vol; // expected-warning {{cast from 'volatile char *' to 'char *' drops volatile qualifier}}23 const volatile char *volc = 0;24 char *volc2 = (char *)volc; // expected-warning {{cast from 'const volatile char *' to 'char *' drops const and volatile qualifiers}}25 26 int **intptrptr;27 const int **intptrptrc = (const int **)intptrptr; // expected-warning {{cast from 'int **' to 'const int **' must have all intermediate pointers const qualified}}28 volatile int **intptrptrv = (volatile int **)intptrptr; // expected-warning {{cast from 'int **' to 'volatile int **' must have all intermediate pointers const qualified}}29 30 int *intptr;31 const int *intptrc = (const int *)intptr; // no warning32 33 const char **charptrptrc;34 char **charptrptr = (char **)charptrptrc; // expected-warning {{cast from 'const char *' to 'char *' drops const qualifier}}35 36 const char *constcharptr;37 char *charptr = (char *)constcharptr; // expected-warning {{cast from 'const char *' to 'char *' drops const qualifier}}38 const char *constcharptr2 = (char *)constcharptr; // expected-warning {{cast from 'const char *' to 'char *' drops const qualifier}}39 const char *charptr2 = (char *)charptr; // no warning40 41#ifdef __cplusplus42 using CharPtr = char *;43 using CharPtrPtr = char **;44 using ConstCharPtrPtr = const char **;45 using CharPtrConstPtr = char *const *;46 47 char *fy = CharPtr(ptr); // expected-warning {{cast from 'const char *' to 'char *' drops const qualifier}}48 char **fy1 = CharPtrPtr(ptrptr); // expected-warning {{cast from 'const char *const *' to 'char **' drops const qualifier}}49 const char **fy2 = ConstCharPtrPtr(ptrptr); // expected-warning {{cast from 'const char *const *' to 'const char **' drops const qualifier}}50 char *const *fy3 = CharPtrConstPtr(ptrptr); // expected-warning {{cast from 'const char *const' to 'char *const' drops const qualifier}}51 const char **fy4 = ConstCharPtrPtr(ptrcptr); // expected-warning {{cast from 'char *const *' to 'const char **' drops const qualifier}}52 53 using ConstVoidPtr = const void *;54 char *fz = CharPtr(uintptr_t(ConstVoidPtr(ptr))); // no warning55 char *fz1 = CharPtr(ConstVoidPtr(ptr)); // expected-warning {{cast from 'const void *' to 'char *' drops const qualifier}}56 57 char *fvol2 = CharPtr(vol); // expected-warning {{cast from 'volatile char *' to 'char *' drops volatile qualifier}}58 char *fvolc2 = CharPtr(volc); // expected-warning {{cast from 'const volatile char *' to 'char *' drops const and volatile qualifiers}}59 60 using ConstIntPtrPtr = const int **;61 using VolitileIntPtrPtr = volatile int **;62 const int **fintptrptrc = ConstIntPtrPtr(intptrptr); // expected-warning {{cast from 'int **' to 'ConstIntPtrPtr' (aka 'const int **') must have all intermediate pointers const qualified}}63 volatile int **fintptrptrv = VolitileIntPtrPtr(intptrptr); // expected-warning {{cast from 'int **' to 'VolitileIntPtrPtr' (aka 'volatile int **') must have all intermediate pointers const qualified}}64 65 using ConstIntPtr = const int *;66 const int *fintptrc = ConstIntPtr(intptr); // no warning67 68 char **fcharptrptr = CharPtrPtr(charptrptrc); // expected-warning {{cast from 'const char *' to 'char *' drops const qualifier}}69 70 char *fcharptr = CharPtr(constcharptr); // expected-warning {{cast from 'const char *' to 'char *' drops const qualifier}}71 const char *fcharptr2 = CharPtr(charptr); // no warning72#endif73}74 75void bar_0(void) {76 struct C {77 const int a;78 int b;79 };80 81 const struct C S = {0, 0};82 83 *(int *)(&S.a) = 0; // expected-warning {{cast from 'const int *' to 'int *' drops const qualifier}}84 *(int *)(&S.b) = 0; // expected-warning {{cast from 'const int *' to 'int *' drops const qualifier}}85 86#ifdef __cplusplus87 using IntPtr = int *;88 *(IntPtr(&S.a)) = 0; // expected-warning {{cast from 'const int *' to 'int *' drops const qualifier}}89 *(IntPtr(&S.b)) = 0; // expected-warning {{cast from 'const int *' to 'int *' drops const qualifier}}90#endif91}92 93void bar_1(void) {94 struct C {95 const int a;96 int b;97 };98 99 struct C S = {0, 0};100 S.b = 0; // no warning101 102 *(int *)(&S.a) = 0; // expected-warning {{cast from 'const int *' to 'int *' drops const qualifier}}103 *(int *)(&S.b) = 0; // no warning104 105#ifdef __cplusplus106 using IntPtr = int *;107 *(IntPtr(&S.a)) = 0; // expected-warning {{cast from 'const int *' to 'int *' drops const qualifier}}108 *(IntPtr(&S.b)) = 0; // no warning109#endif110}111