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authorRichard Henderson <rth@twiddle.net>2012-09-21 17:18:14 -0700
committerAurelien Jarno <aurelien@aurel32.net>2012-09-26 00:31:16 +0200
commitc552d6c038f7cf4058d1fd5987118ffd41e0e050 (patch)
tree35f7ba079285dd869d5f2cd4348b2258f00abe89
parent77276f6581b660a14bec069ec8d20f1280bddeb6 (diff)
downloadqemu-arm-c552d6c038f7cf4058d1fd5987118ffd41e0e050.tar.gz
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.h9
1 files changed, 9 insertions, 0 deletions
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