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[PULL,02/10] qemu/compiler: Split out qemu_build_not_reached_always

Message ID 20210123185020.1766324-3-richard.henderson@linaro.org (mailing list archive)
State New, archived
Headers show
Series [PULL,01/10] tcg: update the cpu running flag in cpu_exec_step_atomic | expand

Commit Message

Richard Henderson Jan. 23, 2021, 6:50 p.m. UTC
Provide a symbol that can always be used to signal an error,
regardless of optimization.  Usage of this should be protected
by e.g. __builtin_constant_p, which guards for optimization.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 include/qemu/compiler.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/include/qemu/compiler.h b/include/qemu/compiler.h
index d620a841e4..cf28bb2bcd 100644
--- a/include/qemu/compiler.h
+++ b/include/qemu/compiler.h
@@ -215,9 +215,10 @@ 
  * supports QEMU_ERROR, this will be reported at compile time; otherwise
  * this will be reported at link time due to the missing symbol.
-#if defined(__OPTIMIZE__) && !defined(__NO_INLINE__)
 extern void QEMU_NORETURN QEMU_ERROR("code path is reachable")
-    qemu_build_not_reached(void);
+    qemu_build_not_reached_always(void);
+#if defined(__OPTIMIZE__) && !defined(__NO_INLINE__)
+#define qemu_build_not_reached()  qemu_build_not_reached_always()
 #define qemu_build_not_reached()  g_assert_not_reached()