target/mips: Use tcg_constant_tl() in gen_compute_compact_branch()

The offset is constant and read-only: move it to the constant pool.

Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Message-Id: <[email protected]>

Author: philmd

target/mips/tcg/translate.c

@@ -11857,13 +11857,11 @@ static void gen_compute_compact_branch(DisasContext *ctx, uint32_t opc,
         } else {
             /* OPC_JIC, OPC_JIALC */
             TCGv tbase = tcg_temp_new();
-            TCGv toffset = tcg_temp_new();
+            TCGv toffset = tcg_constant_tl(offset);
 
             gen_load_gpr(tbase, rt);
-            tcg_gen_movi_tl(toffset, offset);
             gen_op_addr_add(ctx, btarget, tbase, toffset);
             tcg_temp_free(tbase);
-            tcg_temp_free(toffset);
         }
         break;
     default: