[PATCH 4/8] [RS6000] rs6000_rtx_costs tidy break/return

[Alan Modra via Gcc-patches]

Most cases use "return false" rather than breaking out of the switch.
Do so in all cases.

        * config/rs6000/rs6000.c (rs6000_rtx_costs): Tidy break/return.

diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index bc5e51aa5ce..383d2901c9f 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -21371,7 +21371,7 @@ rs6000_rtx_costs (rtx x, machine_mode mode, int 
outer_code,
        *total = rs6000_cost->fp;
       else
        *total = rs6000_cost->dmul;
-      break;
+      return false;
 
     case DIV:
     case MOD:
@@ -21539,7 +21539,7 @@ rs6000_rtx_costs (rtx x, machine_mode mode, int 
outer_code,
          *total = rs6000_cost->fp;
          return false;
        }
-      break;
+      return false;
 
     case NE:
     case EQ:
@@ -21577,13 +21577,11 @@ rs6000_rtx_costs (rtx x, machine_mode mode, int 
outer_code,
          *total = 0;
          return true;
        }
-      break;
+      return false;
 
     default:
-      break;
+      return false;
     }
-
-  return false;
 }
 
 /* Debug form of r6000_rtx_costs that is selected if -mdebug=cost.  */