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: b2167459ae ("target-hppa: Implement basic arithmetic")
Buglink: https://bugs.launchpad.net/qemu/+bug/1880287
Tested-by: Sven Schnelle <svens@stackframe.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20200720174039.517902-1-richard.henderson@linaro.org>
(cherry picked from commit 79826f99feb7222b7804058f0b4ace9ee0546361)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/target/hppa/translate.c b/target/hppa/translate.c
index 52d7bea1eac0733aac1b6e6b0720a3e5430a28cd..4bd22d4820b72c8dfd625c89ab18ee05de440e5f 100644 (file)
--- a/target/hppa/translate.c
+++ b/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);