[4/5] target-mips: replace break by goto cp0_unimplemented

this fixes many warnings like:

target/mips/translate.c:6253:13: warning: Value stored to 'rn' is never read
            rn = "invalid sel";
            ^    ~~~~~~~~~~~~~

Reported-by: Clang Static Analyzer
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 target/mips/translate.c | 88 ++++++++++++++++++++++++-------------------------
 1 file changed, 44 insertions(+), 44 deletions(-)

On 04/03/2017 18:56, Philippe Mathieu-Daudé wrote:
> this fixes many warnings like:
> 
> target/mips/translate.c:6253:13: warning: Value stored to 'rn' is never read
>             rn = "invalid sel";
>             ^    ~~~~~~~~~~~~~
> 
> Reported-by: Clang Static Analyzer
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  target/mips/translate.c | 88 ++++++++++++++++++++++++-------------------------
>  1 file changed, 44 insertions(+), 44 deletions(-)
> 
> diff --git a/target/mips/translate.c b/target/mips/translate.c
> index 5c030a90cd..fc11e15a17 100644
> --- a/target/mips/translate.c
> +++ b/target/mips/translate.c
> @@ -5458,19 +5458,19 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>          case 1:
>  //            gen_helper_mfc0_tracecontrol(arg); /* PDtrace support */
>              rn = "TraceControl";
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_mfc0_tracecontrol2(arg); /* PDtrace support */
>              rn = "TraceControl2";
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>  //            gen_helper_mfc0_usertracedata(arg); /* PDtrace support */
>              rn = "UserTraceData";
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_mfc0_tracebpc(arg); /* PDtrace support */
>              rn = "TraceBPC";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> @@ -5496,31 +5496,31 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>          case 1:
>  //            gen_helper_mfc0_performance1(arg);
>              rn = "Performance1";
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_mfc0_performance2(arg);
>              rn = "Performance2";
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>  //            gen_helper_mfc0_performance3(arg);
>              rn = "Performance3";
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_mfc0_performance4(arg);
>              rn = "Performance4";
> -//            break;
> +            goto cp0_unimplemented;
>          case 5:
>  //            gen_helper_mfc0_performance5(arg);
>              rn = "Performance5";
> -//            break;
> +            goto cp0_unimplemented;
>          case 6:
>  //            gen_helper_mfc0_performance6(arg);
>              rn = "Performance6";
> -//            break;
> +            goto cp0_unimplemented;
>          case 7:
>  //            gen_helper_mfc0_performance7(arg);
>              rn = "Performance7";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> @@ -6116,13 +6116,13 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>              rn = "TraceControl";
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_mtc0_tracecontrol2(cpu_env, arg); /* PDtrace support */
>              rn = "TraceControl2";
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
> @@ -6130,13 +6130,13 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>              rn = "UserTraceData";
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_mtc0_tracebpc(cpu_env, arg); /* PDtrace support */
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
>              rn = "TraceBPC";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> @@ -6161,31 +6161,31 @@ static void gen_mtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>          case 1:
>  //            gen_helper_mtc0_performance1(arg);
>              rn = "Performance1";
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_mtc0_performance2(arg);
>              rn = "Performance2";
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>  //            gen_helper_mtc0_performance3(arg);
>              rn = "Performance3";
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_mtc0_performance4(arg);
>              rn = "Performance4";
> -//            break;
> +            goto cp0_unimplemented;
>          case 5:
>  //            gen_helper_mtc0_performance5(arg);
>              rn = "Performance5";
> -//            break;
> +            goto cp0_unimplemented;
>          case 6:
>  //            gen_helper_mtc0_performance6(arg);
>              rn = "Performance6";
> -//            break;
> +            goto cp0_unimplemented;
>          case 7:
>  //            gen_helper_mtc0_performance7(arg);
>              rn = "Performance7";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> @@ -6766,19 +6766,19 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>          case 1:
>  //            gen_helper_dmfc0_tracecontrol(arg, cpu_env); /* PDtrace support */
>              rn = "TraceControl";
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_dmfc0_tracecontrol2(arg, cpu_env); /* PDtrace support */
>              rn = "TraceControl2";
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>  //            gen_helper_dmfc0_usertracedata(arg, cpu_env); /* PDtrace support */
>              rn = "UserTraceData";
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_dmfc0_tracebpc(arg, cpu_env); /* PDtrace support */
>              rn = "TraceBPC";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> @@ -6803,31 +6803,31 @@ static void gen_dmfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>          case 1:
>  //            gen_helper_dmfc0_performance1(arg);
>              rn = "Performance1";
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_dmfc0_performance2(arg);
>              rn = "Performance2";
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>  //            gen_helper_dmfc0_performance3(arg);
>              rn = "Performance3";
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_dmfc0_performance4(arg);
>              rn = "Performance4";
> -//            break;
> +            goto cp0_unimplemented;
>          case 5:
>  //            gen_helper_dmfc0_performance5(arg);
>              rn = "Performance5";
> -//            break;
> +            goto cp0_unimplemented;
>          case 6:
>  //            gen_helper_dmfc0_performance6(arg);
>              rn = "Performance6";
> -//            break;
> +            goto cp0_unimplemented;
>          case 7:
>  //            gen_helper_dmfc0_performance7(arg);
>              rn = "Performance7";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> @@ -7417,25 +7417,25 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
>              rn = "TraceControl";
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_mtc0_tracecontrol2(cpu_env, arg); /* PDtrace support */
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
>              rn = "TraceControl2";
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>  //            gen_helper_mtc0_usertracedata(cpu_env, arg); /* PDtrace support */
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
>              rn = "UserTraceData";
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_mtc0_tracebpc(cpu_env, arg); /* PDtrace support */
>              /* Stop translation as we may have switched the execution mode */
>              ctx->bstate = BS_STOP;
>              rn = "TraceBPC";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> @@ -7460,31 +7460,31 @@ static void gen_dmtc0(DisasContext *ctx, TCGv arg, int reg, int sel)
>          case 1:
>  //            gen_helper_mtc0_performance1(cpu_env, arg);
>              rn = "Performance1";
> -//            break;
> +            goto cp0_unimplemented;
>          case 2:
>  //            gen_helper_mtc0_performance2(cpu_env, arg);
>              rn = "Performance2";
> -//            break;
> +            goto cp0_unimplemented;
>          case 3:
>  //            gen_helper_mtc0_performance3(cpu_env, arg);
>              rn = "Performance3";
> -//            break;
> +            goto cp0_unimplemented;
>          case 4:
>  //            gen_helper_mtc0_performance4(cpu_env, arg);
>              rn = "Performance4";
> -//            break;
> +            goto cp0_unimplemented;
>          case 5:
>  //            gen_helper_mtc0_performance5(cpu_env, arg);
>              rn = "Performance5";
> -//            break;
> +            goto cp0_unimplemented;
>          case 6:
>  //            gen_helper_mtc0_performance6(cpu_env, arg);
>              rn = "Performance6";
> -//            break;
> +            goto cp0_unimplemented;
>          case 7:
>  //            gen_helper_mtc0_performance7(cpu_env, arg);
>              rn = "Performance7";
> -//            break;
> +            goto cp0_unimplemented;
>          default:
>              goto cp0_unimplemented;
>          }
> 

Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>