Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp1y/constexpr-arith-overflow.C @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children |
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// Test to exercise that the type-specific integer arithmetic built-ins // with overflow checking can be used in C++ 14 constant expressions. // -Woverflow is disabled to prevent (bogus?) G++ warnings. // { dg-do compile { target c++14 } } // { dg-additional-options "-Wno-overflow" } #define SCHAR_MAX __SCHAR_MAX__ #define SHRT_MAX __SHRT_MAX__ #define INT_MAX __INT_MAX__ #define LONG_MAX __LONG_MAX__ #define LLONG_MAX __LONG_LONG_MAX__ #define SCHAR_MIN (-__SCHAR_MAX__ - 1) #define SHRT_MIN (-__SHRT_MAX__ - 1) #define INT_MIN (-__INT_MAX__ - 1) #define LONG_MIN (-__LONG_MAX__ - 1) #define LLONG_MIN (-__LONG_LONG_MAX__ - 1) #define UCHAR_MAX (SCHAR_MAX * 2U + 1) #define USHRT_MAX (SHRT_MAX * 2U + 1) #define UINT_MAX (INT_MAX * 2U + 1) #define ULONG_MAX (LONG_MAX * 2LU + 1) #define ULLONG_MAX (LLONG_MAX * 2LLU + 1) #define USCHAR_MIN (-__USCHAR_MAX__ - 1) #define USHRT_MIN (-__USHRT_MAX__ - 1) #define UINT_MIN (-__UINT_MAX__ - 1) #define ULONG_MIN (-__ULONG_MAX__ - 1) #define ULLONG_MIN (-__ULONG_LONG_MAX__ - 1) // Helper macros. #define sadd(x, y) ((x) + (y)) #define saddl(x, y) ((x) + (y)) #define saddll(x, y) ((x) + (y)) #define uadd(x, y) ((x) + (y)) #define uaddl(x, y) ((x) + (y)) #define uaddll(x, y) ((x) + (y)) #define ssub(x, y) ((x) - (y)) #define ssubl(x, y) ((x) - (y)) #define ssubll(x, y) ((x) - (y)) #define usub(x, y) ((x) - (y)) #define usubl(x, y) ((x) - (y)) #define usubll(x, y) ((x) - (y)) #define smul(x, y) ((x) * (y)) #define smull(x, y) ((x) * (y)) #define smulll(x, y) ((x) * (y)) #define umul(x, y) ((x) * (y)) #define umull(x, y) ((x) * (y)) #define umulll(x, y) ((x) * (y)) // Result object. template <class T> struct Res { constexpr Res (T a, bool v): z (a), v (v) { } T z; bool v; }; template <class T> constexpr bool operator== (Res<T> a, Res<T> b) { return a.z == b.z && a.v == b.v; } #define StaticAssert(expr) static_assert ((expr), #expr) #define CONCAT(a, b) a ## b #define CAT(a, b) CONCAT (a, b) // Helper to determine the type of the result of the arithmetic // as specified by the built-ins. template <class T> struct ResType { typedef T type; }; template <> struct ResType<signed char> { typedef int type; }; template <> struct ResType<unsigned char> { typedef unsigned type; }; template <> struct ResType<signed short> { typedef int type; }; template <> struct ResType<unsigned short> { typedef unsigned type; }; // Macro to define a single test case verifying that integer overflow // is detected when expected, and when not, that the result matches // the result computed using ordinary arithmetic. The result cannot // be tested in the presence of overflow since it's not a core // constant expression. #define TEST(op, T, x, y, vflow) \ constexpr Res<T> CAT (op, __LINE__)(T a, T b) \ { \ ResType<T>::type c = 0; \ bool v = __builtin_ ## op ## _overflow (a, b, &c); \ return Res<T>(c, v); \ } \ StaticAssert (vflow ? CAT (op, __LINE__)(x, y).v \ : CAT (op, __LINE__)(x, y) == Res<T>(op (x, y), vflow)) /* Signed int addition. */ TEST (sadd, signed char, 0, 0, 0); TEST (sadd, signed char, 0, SCHAR_MAX, 0); TEST (sadd, signed char, 1, SCHAR_MAX, 0); TEST (sadd, signed char, SCHAR_MAX, SCHAR_MAX, 0); TEST (sadd, signed char, 0, SCHAR_MIN, 0); TEST (sadd, signed char, -1, SCHAR_MIN, 0); TEST (sadd, short, 0, 0, 0); TEST (sadd, short, 0, SHRT_MAX, 0); TEST (sadd, short, 1, SHRT_MAX, 0); TEST (sadd, short, SHRT_MAX, SHRT_MAX, 0); TEST (sadd, short, 0, SHRT_MIN, 0); TEST (sadd, short, -1, SHRT_MIN, 0); TEST (sadd, short, SHRT_MIN, SHRT_MIN, 0); TEST (sadd, int, 0, 0, 0); TEST (sadd, int, 0, INT_MAX, 0); TEST (sadd, int, 1, INT_MAX, 1); TEST (sadd, int, INT_MAX, INT_MAX, 1); TEST (sadd, int, 0, INT_MIN, 0); TEST (sadd, int, -1, INT_MIN, 1); TEST (sadd, int, INT_MIN, INT_MIN, 1); /* Signed long addition. */ TEST (saddl, long, 0L, 0L, 0); TEST (saddl, long, 0L, LONG_MAX, 0); TEST (saddl, long, 1L, LONG_MAX, 1); TEST (saddl, long, LONG_MAX, LONG_MAX, 1); TEST (saddl, long, 0L, LONG_MIN, 0); TEST (saddl, long, -1L, LONG_MIN, 1); TEST (saddl, long, LONG_MIN, LONG_MIN, 1); TEST (saddll, long long, 0LL, 0LL, 0); TEST (saddll, long long, 0LL, LLONG_MAX, 0); TEST (saddll, long long, 1LL, LLONG_MAX, 1); TEST (saddll, long long, LLONG_MAX, LLONG_MAX, 1); TEST (saddll, long long, 0LL, LLONG_MIN, 0); TEST (saddll, long long, -1LL, LLONG_MIN, 1); TEST (saddll, long long, LLONG_MIN, LLONG_MIN, 1); /* Unsigned int addition. */ TEST (uadd, unsigned char, 0U, 0U, 0); TEST (uadd, unsigned char, 0U, UCHAR_MAX, 0); TEST (uadd, unsigned char, 1U, UCHAR_MAX, 0); TEST (uadd, unsigned char, UCHAR_MAX, UCHAR_MAX, 0); TEST (uadd, unsigned short, 0U, 0U, 0); TEST (uadd, unsigned short, 0U, USHRT_MAX, 0); TEST (uadd, unsigned short, 1U, USHRT_MAX, 0); TEST (uadd, unsigned short, USHRT_MAX, USHRT_MAX, 0); TEST (uadd, unsigned, 0U, 0U, 0); TEST (uadd, unsigned, 0U, UINT_MAX, 0); TEST (uadd, unsigned, 1U, UINT_MAX, 1); TEST (uadd, unsigned, UINT_MAX, UINT_MAX, 1); /* Unsigned long addition. */ TEST (uaddl, unsigned long, 0UL, 0UL, 0); TEST (uaddl, unsigned long, 0UL, ULONG_MAX, 0); TEST (uaddl, unsigned long, 1UL, ULONG_MAX, 1); TEST (uaddl, unsigned long, ULONG_MAX, ULONG_MAX, 1); TEST (uaddll, unsigned long long, 0ULL, 0ULL, 0); TEST (uaddll, unsigned long long, 0ULL, ULLONG_MAX, 0); TEST (uaddll, unsigned long long, 1ULL, ULLONG_MAX, 1); TEST (uaddll, unsigned long long, ULLONG_MAX, ULLONG_MAX, 1); /* Signed int subtraction. */ TEST (ssub, signed char, 0, 0, 0); TEST (ssub, signed char, 0, SCHAR_MAX, 0); TEST (ssub, signed char, 1, SCHAR_MAX, 0); TEST (ssub, signed char, SCHAR_MAX, SCHAR_MAX, 0); TEST (ssub, signed char, 0, SCHAR_MIN, 0); TEST (ssub, signed char, -1, SCHAR_MIN, 0); TEST (ssub, short, 0, 0, 0); TEST (ssub, short, 0, SHRT_MAX, 0); TEST (ssub, short, 1, SHRT_MAX, 0); TEST (ssub, short, SHRT_MAX, SHRT_MAX, 0); TEST (ssub, short, 0, SHRT_MIN, 0); TEST (ssub, short, -1, SHRT_MIN, 0); TEST (ssub, short, SHRT_MIN, SHRT_MIN, 0); TEST (ssub, int, 0, 0, 0); TEST (ssub, int, 0, INT_MAX, 0); TEST (ssub, int, 1, INT_MAX, 0); TEST (ssub, int, INT_MAX, INT_MAX, 0); TEST (ssub, int, 0, INT_MIN, 1); TEST (ssub, int, -1, INT_MIN, 0); TEST (ssub, int, INT_MIN, INT_MIN, 0); /* Signed long subtraction. */ TEST (ssubl, long, 0L, 0L, 0); TEST (ssubl, long, 0L, LONG_MAX, 0); TEST (ssubl, long, 1L, LONG_MAX, 0); TEST (ssubl, long, LONG_MAX, LONG_MAX, 0); TEST (ssubl, long, 0L, LONG_MIN, 1); TEST (ssubl, long, -1L, LONG_MIN, 0); TEST (ssubl, long, LONG_MIN, LONG_MIN, 0); /* Signed long long subtraction. */ TEST (ssubll, long long, 0LL, 0LL, 0); TEST (ssubll, long long, 0LL, LLONG_MAX, 0); TEST (ssubll, long long, 1LL, LLONG_MAX, 0); TEST (ssubll, long long, LLONG_MAX, LLONG_MAX, 0); TEST (ssubll, long long, 0LL, LLONG_MIN, 1); TEST (ssubll, long long, -1LL, LLONG_MIN, 0); TEST (ssubll, long long, LLONG_MIN, LLONG_MIN, 0); /* Unsigned int subtraction. */ TEST (usub, unsigned char, 0U, 0U, 0); TEST (usub, unsigned char, 0U, UCHAR_MAX, 1); TEST (usub, unsigned char, 1U, UCHAR_MAX, 1); TEST (usub, unsigned char, UCHAR_MAX, UCHAR_MAX, 0); TEST (usub, unsigned short, 0U, 0U, 0); TEST (usub, unsigned short, 0U, USHRT_MAX, 1); TEST (usub, unsigned short, 1U, USHRT_MAX, 1); TEST (usub, unsigned short, USHRT_MAX, USHRT_MAX, 0); TEST (usub, unsigned, 0U, 0U, 0); TEST (usub, unsigned, 0U, UINT_MAX, 1); TEST (usub, unsigned, 1U, UINT_MAX, 1); TEST (usub, unsigned, UINT_MAX, UINT_MAX, 0); /* Unsigned long subtraction. */ TEST (usubl, unsigned long, 0UL, 0UL, 0); TEST (usubl, unsigned long, 0UL, ULONG_MAX, 1); TEST (usubl, unsigned long, 1UL, ULONG_MAX, 1); TEST (usubl, unsigned long, ULONG_MAX, ULONG_MAX, 0); /* Unsigned long long subtraction. */ TEST (usubll, unsigned long long, 0ULL, 0ULL, 0); TEST (usubll, unsigned long long, 0ULL, ULLONG_MAX, 1); TEST (usubll, unsigned long long, 1ULL, ULLONG_MAX, 1); TEST (usubll, unsigned long long, ULLONG_MAX, ULLONG_MAX, 0);