From c552d6c038f7cf4058d1fd5987118ffd41e0e050 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Fri, 21 Sep 2012 17:18:14 -0700 Subject: 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 Signed-off-by: Aurelien Jarno --- tcg/tcg.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'tcg/tcg.h') diff --git a/tcg/tcg.h b/tcg/tcg.h index 48a56f0b15..4501c1520f 100644 --- a/tcg/tcg.h +++ b/tcg/tcg.h @@ -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 -- cgit v1.2.1