diff options
Diffstat (limited to 'gcc/testsuite/gcc.c-torture/execute/builtins/strlen.c')
-rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/builtins/strlen.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtins/strlen.c b/gcc/testsuite/gcc.c-torture/execute/builtins/strlen.c new file mode 100644 index 000000000..0a9681770 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/builtins/strlen.c @@ -0,0 +1,71 @@ +/* Copyright (C) 2000, 2001, 2003, 2004 Free Software Foundation. + + Ensure all expected transformations of builtin strlen + occur and perform correctly. + + Written by Jakub Jelinek, 11/7/2000. + + Additional tests written by Roger Sayle, 11/02/2001: + Ensure all builtin strlen comparisons against zero are optimized + and perform correctly. The multiple calls to strcpy are to prevent + the potentially "pure" strlen calls from being removed by CSE. + + Modified by Ben Elliston, 2006-10-25: + The multiple calls to strcpy that Roger mentions above are + problematic on systems where strcpy is implemented using strlen + (which this test overrides to call abort). So, rather than use + strcpy, we perform the identical operations using array indexing + and char assignments. */ + +extern void abort (void); +extern __SIZE_TYPE__ strlen (const char *); +extern char *strcpy (char *, const char *); + +int x = 6; + +void +main_test(void) +{ + const char *const foo = "hello world"; + char str[8]; + char *ptr; + + if (strlen (foo) != 11) + abort (); + if (strlen (foo + 4) != 7) + abort (); + if (strlen (foo + (x++ & 7)) != 5) + abort (); + if (x != 7) + abort (); + + ptr = str; + ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0'; + if (strlen (ptr) == 0) + abort (); + + ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0'; + if (strlen (ptr) < 1) + abort (); + + ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0'; + if (strlen (ptr) <= 0) + abort (); + + ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0'; + if (strlen (ptr+3) != 0) + abort (); + + ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0'; + if (strlen (ptr+3) > 0) + abort (); + + ptr[0] = 'n'; ptr[1] = 't'; ptr[2] = 's'; ptr[3] = '\0'; + if (strlen (str+3) >= 1) + abort (); + + /* Test at least one instance of the __builtin_ style. We do this + to ensure that it works and that the prototype is correct. */ + if (__builtin_strlen (foo) != 11) + abort (); +} |