1 files changed, 9 insertions, 0 deletions
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 5882f00..66529f5 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2030,6 +2030,15 @@ static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf,
     unsigned int tpc2gpc_index = 0;
 #endif  // CONFIG_MEMCHECK
 
+#if !SUPPORT_GLOBAL_REGISTER_VARIABLE
+    printf("ERROR: This emulator is built by compiler without global register variable\n"
+           "support!  Emulator reserves a register to point to target architecture state\n"
+           "for better code generation.  LLVM-based compilers such as clang and llvm-gcc\n"
+           "currently don't support global register variable.  Please see\n"
+           "http://source.android.com/source/initializing.html for detail.\n\n");
+    tcg_abort();
+#endif
+
 #ifdef DEBUG_DISAS
     if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
         qemu_log("OP:\n");