diff options
Diffstat (limited to 'gcc/testsuite/gcc.c-torture/execute/memset-3.c')
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/memset-3.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/memset-3.c b/gcc/testsuite/gcc.c-torture/execute/memset-3.c new file mode 100644 index 000000000..64032a775 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/memset-3.c @@ -0,0 +1,208 @@ +/* Copyright (C) 2002 Free Software Foundation. + + Test memset with various combinations of constant pointer alignments and + lengths to make sure any optimizations in the compiler are correct. + + Written by Roger Sayle, July 22, 2002. */ + +#ifndef MAX_OFFSET +#define MAX_OFFSET (sizeof (long long)) +#endif + +#ifndef MAX_COPY +#define MAX_COPY 15 +#endif + +#ifndef MAX_EXTRA +#define MAX_EXTRA (sizeof (long long)) +#endif + +#define MAX_LENGTH (MAX_OFFSET + MAX_COPY + MAX_EXTRA) + +static union { + char buf[MAX_LENGTH]; + long long align_int; + long double align_fp; +} u; + +char A = 'A'; + +void reset () +{ + int i; + + for (i = 0; i < MAX_LENGTH; i++) + u.buf[i] = 'a'; +} + +void check (int off, int len, int ch) +{ + char *q; + int i; + + q = u.buf; + for (i = 0; i < off; i++, q++) + if (*q != 'a') + abort (); + + for (i = 0; i < len; i++, q++) + if (*q != ch) + abort (); + + for (i = 0; i < MAX_EXTRA; i++, q++) + if (*q != 'a') + abort (); +} + +int main () +{ + int len; + char *p; + + /* off == 0 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf, '\0', len); + if (p != u.buf) abort (); + check (0, len, '\0'); + + p = memset (u.buf, A, len); + if (p != u.buf) abort (); + check (0, len, 'A'); + + p = memset (u.buf, 'B', len); + if (p != u.buf) abort (); + check (0, len, 'B'); + } + + /* off == 1 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf+1, '\0', len); + if (p != u.buf+1) abort (); + check (1, len, '\0'); + + p = memset (u.buf+1, A, len); + if (p != u.buf+1) abort (); + check (1, len, 'A'); + + p = memset (u.buf+1, 'B', len); + if (p != u.buf+1) abort (); + check (1, len, 'B'); + } + + /* off == 2 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf+2, '\0', len); + if (p != u.buf+2) abort (); + check (2, len, '\0'); + + p = memset (u.buf+2, A, len); + if (p != u.buf+2) abort (); + check (2, len, 'A'); + + p = memset (u.buf+2, 'B', len); + if (p != u.buf+2) abort (); + check (2, len, 'B'); + } + + /* off == 3 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf+3, '\0', len); + if (p != u.buf+3) abort (); + check (3, len, '\0'); + + p = memset (u.buf+3, A, len); + if (p != u.buf+3) abort (); + check (3, len, 'A'); + + p = memset (u.buf+3, 'B', len); + if (p != u.buf+3) abort (); + check (3, len, 'B'); + } + + /* off == 4 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf+4, '\0', len); + if (p != u.buf+4) abort (); + check (4, len, '\0'); + + p = memset (u.buf+4, A, len); + if (p != u.buf+4) abort (); + check (4, len, 'A'); + + p = memset (u.buf+4, 'B', len); + if (p != u.buf+4) abort (); + check (4, len, 'B'); + } + + /* off == 5 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf+5, '\0', len); + if (p != u.buf+5) abort (); + check (5, len, '\0'); + + p = memset (u.buf+5, A, len); + if (p != u.buf+5) abort (); + check (5, len, 'A'); + + p = memset (u.buf+5, 'B', len); + if (p != u.buf+5) abort (); + check (5, len, 'B'); + } + + /* off == 6 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf+6, '\0', len); + if (p != u.buf+6) abort (); + check (6, len, '\0'); + + p = memset (u.buf+6, A, len); + if (p != u.buf+6) abort (); + check (6, len, 'A'); + + p = memset (u.buf+6, 'B', len); + if (p != u.buf+6) abort (); + check (6, len, 'B'); + } + + /* off == 7 */ + for (len = 0; len < MAX_COPY; len++) + { + reset (); + + p = memset (u.buf+7, '\0', len); + if (p != u.buf+7) abort (); + check (7, len, '\0'); + + p = memset (u.buf+7, A, len); + if (p != u.buf+7) abort (); + check (7, len, 'A'); + + p = memset (u.buf+7, 'B', len); + if (p != u.buf+7) abort (); + check (7, len, 'B'); + } + + exit (0); +} + |