tcg: Change translator-side labels to a pointer

This is improved type checking for the translators -- it's no longer
possible to accidentally swap arguments to the branch functions.

Note that the code generating backends still manipulate labels as int.

With notable exceptions, the scope of the change is just a few lines
for each target, so it's not worth building extra machinery to do this
change in per-target increments.

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Cc: Michael Walle <michael@walle.cc>
Cc: Leon Alrae <leon.alrae@imgtec.com>
Cc: Anthony Green <green@moxielogic.com>
Cc: Jia Liu <proljc@gmail.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Blue Swirl <blauwirbel@gmail.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index c73ea61b16..4f82edde5b 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -1177,7 +1177,7 @@ static ExitStatus help_branch(DisasContext *s, DisasCompare *c,
 {
     ExitStatus ret;
     uint64_t dest = s->pc + 2 * imm;
-    int lab;
+    TCGLabel *lab;
 
     /* Take care of the special cases first.  */
     if (c->cond == TCG_COND_NEVER) {
@@ -1953,7 +1953,7 @@ static ExitStatus op_cvd(DisasContext *s, DisasOps *o)
 static ExitStatus op_ct(DisasContext *s, DisasOps *o)
 {
     int m3 = get_field(s->fields, m3);
-    int lab = gen_new_label();
+    TCGLabel *lab = gen_new_label();
     TCGv_i32 t;
     TCGCond c;
 
@@ -3077,7 +3077,8 @@ static ExitStatus op_soc(DisasContext *s, DisasOps *o)
 {
     DisasCompare c;
     TCGv_i64 a;
-    int lab, r1;
+    TCGLabel *lab;
+    int r1;
 
     disas_jcc(s, &c, get_field(s->fields, m3));