diff options
Diffstat (limited to 'gcc/flags.h')
| -rw-r--r-- | gcc/flags.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/gcc/flags.h b/gcc/flags.h index ce9d6d7..d2c1ca0 100644 --- a/gcc/flags.h +++ b/gcc/flags.h @@ -1,6 +1,6 @@ /* Compilation switch flag definitions for GCC. Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, - 2003, 2004, 2005 + 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. This file is part of GCC. @@ -288,4 +288,20 @@ extern const char *flag_random_seed; #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) +/* True if overflow wraps around for the given integral type. That + is, TYPE_MAX + 1 == TYPE_MIN. */ +#define TYPE_OVERFLOW_WRAPS(TYPE) \ + (TYPE_UNSIGNED (TYPE) || flag_wrapv) + +/* True if overflow is undefined for the given integral type. We may + optimize on the assumption that values in the type never + overflow. */ +#define TYPE_OVERFLOW_UNDEFINED(TYPE) \ + (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow) + +/* True if overflow for the given integral type should issue a + trap. */ +#define TYPE_OVERFLOW_TRAPS(TYPE) \ + (!TYPE_UNSIGNED (TYPE) && flag_trapv) + #endif /* ! GCC_FLAGS_H */ |