[Qemu-stable] [PATCH for 2.11] target/sh4/translate.c: fix TCG leak during gusa sequence

[Alex Bennée]

This fixes bug #1735384 while running java under qemu-sh4. When debug
was enabled it showed a problem with TCG temps. Once fixed I was able
to run java -version normally.

Reported-by: John Paul Adrian Glaubitz <address@hidden>
Suggested-by: Richard Henderson <address@hidden>
Signed-off-by: Alex Bennée <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Tested-by: John Paul Adrian Glaubitz <address@hidden>
Cc: address@hidden
---
 target/sh4/translate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/sh4/translate.c b/target/sh4/translate.c
index 703020fe87..b4b5c822d0 100644
--- a/target/sh4/translate.c
+++ b/target/sh4/translate.c
@@ -2189,7 +2189,7 @@ static int decode_gusa(DisasContext *ctx, CPUSH4State 
*env, int *pmax_insns)
     }
 
     /* If op_src is not a valid register, then op_arg was a constant.  */
-    if (op_src < 0) {
+    if (op_src < 0 && !TCGV_IS_UNUSED(op_arg)) {
         tcg_temp_free_i32(op_arg);
     }
 
-- 
2.15.1