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| author | Ian Lance Taylor <iant@google.com> | 2008-04-14 19:18:31 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2008-04-14 19:18:31 +0000 |
| commit | 4c9db6e07aba115c21ab02068ccc332ce691775e (patch) | |
| tree | 5476839d99a5b4e7b501ffa138ec06b5cc5cb144 /gcc/flags.h | |
| parent | 3a5a8be12000125f4c12efea8bd6a466049a688d (diff) | |
| download | gcc-4c9db6e07aba115c21ab02068ccc332ce691775e.zip gcc-4c9db6e07aba115c21ab02068ccc332ce691775e.tar.gz gcc-4c9db6e07aba115c21ab02068ccc332ce691775e.tar.bz2 | |
flags.h (POINTER_TYPE_OVERFLOW_UNDEFINED): Define.
gcc/:
* flags.h (POINTER_TYPE_OVERFLOW_UNDEFINED): Define.
* fold-const.c (fold_comparison): If appropriate, test
POINTER_TYPE_OVERFLOW_UNDEFINED, and issue an overflow warning.
(fold_binary): Test POINTER_TYPE_OVERFLOW_UNDEFINED when
reassociating a pointer type.
* doc/invoke.texi (Optimize Options): Document that
-fstrict-overflow applies to pointer wraparound.
gcc/testsuite/:
* gcc.dg/strict-overflow-6.c: New.
* gcc.dg/no-strict-overflow-7.c: New.
* gcc.dg/Wstrict-overflow-22.c: New.
From-SVN: r134287
Diffstat (limited to 'gcc/flags.h')
| -rw-r--r-- | gcc/flags.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/flags.h b/gcc/flags.h index 686691c..e759695 100644 --- a/gcc/flags.h +++ b/gcc/flags.h @@ -332,6 +332,9 @@ extern bool flag_instrument_functions_exclude_p (tree fndecl); #define TYPE_OVERFLOW_TRAPS(TYPE) \ (!TYPE_UNSIGNED (TYPE) && flag_trapv) +/* True if pointer types have undefined overflow. */ +#define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow) + /* Names for the different levels of -Wstrict-overflow=N. The numeric values here correspond to N. */ |