qemu/0048-target-xtensa-don-t-emit-extra-tcg_gen_goto_tb.patch

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2012-10-28 18:05:07 +00:00
From ba9c2acb955f0453ae80077a791a4d1c27b5d6e6 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Fri, 21 Sep 2012 02:59:50 +0400
Subject: [PATCH] target-xtensa: don't emit extra tcg_gen_goto_tb
Unconditional gen_check_loop_end at the end of disas_xtensa_insn
can emit tcg_gen_goto_tb with slot id already used in the TB (e.g. when
TB ends at LEND with a branch).
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Signed-off-by: malc <av1474@comtv.ru>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
target-xtensa/translate.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index 7a1c528..b6643eb 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -2520,7 +2520,9 @@ static void disas_xtensa_insn(DisasContext *dc)
break;
}
- gen_check_loop_end(dc, 0);
+ if (dc->is_jmp == DISAS_NEXT) {
+ gen_check_loop_end(dc, 0);
+ }
dc->pc = dc->next_pc;
return;