[PATCH v2 18/27] target/s390x: Disable conditional branch-to-next for PER

[Richard Henderson]

For PER, we require a conditional call to helper_per_branch
for the conditional branch.  Fold the remaining optimization
into a call to helper_goto_direct, which will take care of
the remaining gbea adjustment.

Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/s390x/tcg/translate.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 28c6e0211f..9e84f706d5 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -1203,13 +1203,12 @@ static DisasJumpType help_branch(DisasContext *s, 
DisasCompare *c,
         goto egress;
     }
     if (is_imm) {
-        if (disp == s->ilen) {
-            /* Branch to next.  */
-            per_branch(s, true);
-            ret = DISAS_NEXT;
-            goto egress;
-        }
-        if (c->cond == TCG_COND_ALWAYS) {
+        /*
+         * Do not optimize a conditional branch if PER enabled, because we
+         * still need a conditional call to helper_per_branch.
+         */
+        if (c->cond == TCG_COND_ALWAYS
+            || (disp == s->ilen && !per_enabled(s))) {
             ret = help_goto_direct(s, disp);
             goto egress;
         }
-- 
2.34.1