diff options
| author |   Richard Henderson <rth@twiddle.net> | 2012-09-21 17:18:14 -0700 |
|---|---|---|
| committer |   Aurelien Jarno <aurelien@aurel32.net> | 2012-09-26 00:31:16 +0200 |
| commit | c552d6c038f7cf4058d1fd5987118ffd41e0e050 (patch) | |
| tree | 35f7ba079285dd869d5f2cd4348b2258f00abe89 | |
| parent | 77276f6581b660a14bec069ec8d20f1280bddeb6 (diff) | |
tcg: Add tcg_debug_assert
Like the C assert macro, except only enabled for CONFIG_DEBUG_TCG,
and without having to set _NDEBUG and disable all other asserts at
the same time.
The use of __builtin_unreachable (when available) gives the compiler
the same information, which may (or may not) help it optimize better.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | tcg/tcg.h | 9 |
1 files changed, 9 insertions, 0 deletions
@@ -530,6 +530,15 @@ do {\ abort();\ } while (0) +#ifdef CONFIG_DEBUG_TCG +# define tcg_debug_assert(X) do { assert(X); } while (0) +#elif QEMU_GNUC_PREREQ(4, 5) +# define tcg_debug_assert(X) \ + do { if (!(X)) { __builtin_unreachable(); } } while (0) +#else +# define tcg_debug_assert(X) do { (void)(X); } while (0) +#endif + void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs); #if TCG_TARGET_REG_BITS == 32 |