blob: 1247394e4d9f49f0b912f3e5858cbc12819a3be4 [file] [log] [blame]
 /* PR middle-end/69780 - [4.9/5/6 Regression] ICE on __builtin_alloca_with_align with small alignment */ /* { dg-do compile } */ /* { dg-require-effective-target alloca } */ /* { dg-options "-Wno-long-long" } */ #define CHAR_BIT __CHAR_BIT__ #define SIZE_MAX __SIZE_MAX__ #define UINT_MAX (__INT_MAX__ + 1U) /* The largest valid alignment is undocumented and subject to change but for the purposes of white box testing we rely on knowing that it happens to be defined to (UINT_MAX >> 1) + 1. */ #define ALIGN_MAX ((UINT_MAX >> 1) + 1) #if UINT_MAX < SIZE_MAX /* Define a constant to exercise an alignment that is valid a power of 2 in excess of the maximum. */ # define MAX_X_2 (ALIGN_MAX << 1) #else /* For targets where UINT_MAX is the same as SIZE_MAX, use an invalid alignment that's less than the maximum to elicit the same errors. */ # define MAX_X_2 (ALIGN_MAX + 1) #endif static void* p; /* Verify that valid __builtin_alloca_with_align expressions are accepted. */ void test_valid (int n) { enum { A1 = CHAR_BIT * 1, A2 = CHAR_BIT * 2, A4 = CHAR_BIT * 4, A8 = CHAR_BIT * 8, A16 = CHAR_BIT * 16, A32 = CHAR_BIT * 32 }; /* Valid alignments are power of 2 positive multiples of CHAR_BIT. */ p = __builtin_alloca_with_align (n, CHAR_BIT * 1); p = __builtin_alloca_with_align (n, CHAR_BIT * 2); p = __builtin_alloca_with_align (n, CHAR_BIT * 4); p = __builtin_alloca_with_align (n, CHAR_BIT * 8); p = __builtin_alloca_with_align (n, CHAR_BIT * 16); p = __builtin_alloca_with_align (n, CHAR_BIT * 32); p = __builtin_alloca_with_align (n, A1); p = __builtin_alloca_with_align (n, A2); p = __builtin_alloca_with_align (n, A4); p = __builtin_alloca_with_align (n, A8); p = __builtin_alloca_with_align (n, A16); p = __builtin_alloca_with_align (n, A32); } /* Non-integer alignments must be rejected. */ void test_arg2_non_int (int n) { /* Verify the full text of the diagnostic just once. */ p = __builtin_alloca_with_align (n, 0.0); /* { dg-error "second argument to function .__builtin_alloca_with_align. must be a constant integer power of 2 between .8. and " } */ /* Disable diagnostic complaining about converting void* to int that preempts the "constant integer expression" error. */ #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wint-conversion" p = __builtin_alloca_with_align (n, (void*)0); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, ""); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, L""); /* { dg-error "must be a constant integer" } */ #pragma GCC diagnostic pop } /* Integer alignment that's not a constant expression must be rejected. */ void test_arg2_non_const (int n, int a1) { extern const int a2; static const int a3 = CHAR_BIT; static volatile const int a4 = CHAR_BIT; p = __builtin_alloca_with_align (n, a1); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, a2); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, a3); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, a4); /* { dg-error "must be a constant integer" } */ } /* Constant integer alignment that's not a power of 2 positive multiple of CHAR_BIT less than (1LLU << 32) must be rejected. */ void test_arg2_non_pow2 (int n) { p = __builtin_alloca_with_align (n, 0); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 1); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 2); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 3); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 4); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 5); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 6); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 7); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 9); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 10); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 11); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 12); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 13); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 14); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 15); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 17); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 31); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 33); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 63); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, 65); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, SIZE_MAX); /* { dg-error "must be a constant integer" } */ p = __builtin_alloca_with_align (n, MAX_X_2); /* { dg-error "must be a constant integer" } */ }