target/hppa: Free some temps in do_sub

Two temps allocated but not freed.  Do enough subtractions
within a single TB and one can run out of temps entirely.

Fixes: b216745 ("target-hppa: Implement basic arithmetic")
Buglink: https://bugs.launchpad.net/qemu/+bug/1880287
Tested-by: Sven Schnelle <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Richard Henderson <[email protected]>
Message-Id: <[email protected]>

Author: rth7680

target/hppa/translate.c

@@ -1294,6 +1294,8 @@ static void do_sub(DisasContext *ctx, unsigned rt, TCGv_reg in1,
     save_or_nullify(ctx, cpu_psw_cb_msb, cb_msb);
     save_gpr(ctx, rt, dest);
     tcg_temp_free(dest);
+    tcg_temp_free(cb);
+    tcg_temp_free(cb_msb);
 
     /* Install the new nullification.  */
     cond_free(&ctx->null_cond);