target/arm: fix TCG leak for fcvt half->double

When support for the AHP flag was added we inexplicably only freed the
new temps in one of the two legs. Move those tcg_temp_free to the same
level as the allocation to fix that leak.

Fixes: 486624fcSigned-off-by: NAlex Bennée <alex.bennee@linaro.org>
Message-id: 20200131153439.26027-1-alex.bennee@linaro.org
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
(cherry picked from commit aeab8e5e)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>

target/arm/translate-a64.c

@@ -5778,8 +5778,6 @@ static void handle_fp_fcvt(DisasContext *s, int opcode,
             TCGv_i32 tcg_rd = tcg_temp_new_i32();
             gen_helper_vfp_fcvt_f16_to_f32(tcg_rd, tcg_rn, tcg_fpst, tcg_ahp);
             write_fp_sreg(s, rd, tcg_rd);
-            tcg_temp_free_ptr(tcg_fpst);
-            tcg_temp_free_i32(tcg_ahp);
             tcg_temp_free_i32(tcg_rd);
         } else {
             /* Half to double */
@@ -5789,6 +5787,8 @@ static void handle_fp_fcvt(DisasContext *s, int opcode,
             tcg_temp_free_i64(tcg_rd);
         }
         tcg_temp_free_i32(tcg_rn);
+        tcg_temp_free_ptr(tcg_fpst);
+        tcg_temp_free_i32(tcg_ahp);
         break;
     }
     default: