[RFA 6/9] Add two fall-through comments in rs6000-tdep.c

[Tom Tromey <tom@tromey.com>]

This adds two fall-through comments in rs6000-tdep.c.  I looked at the
PPC instruction manual and convinced myself that this was correct.
And, this isn't a semantic change.  However, close review would still
be good.

ChangeLog
2018-04-21  Tom Tromey  <tom@tromey.com>

	* rs6000-tdep.c (ppc_process_record_op4)
	(ppc_process_record_op63): Add fall-through comment.
---
 gdb/ChangeLog     | 5 +++++
 gdb/rs6000-tdep.c | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index 37cbcb672b..2f0012479b 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -3969,6 +3969,7 @@ ppc_process_record_op4 (struct gdbarch *gdbarch, struct regcache *regcache,
 	  && vra != 7	/* Decimal Convert From National */
 	  && vra != 31)	/* Decimal Set Sign */
 	break;
+      /* Fall through.  */
 			/* 5.16 Decimal Integer Arithmetic Instructions */
     case 1:		/* Decimal Add Modulo */
     case 65:		/* Decimal Subtract Modulo */
@@ -5565,6 +5566,7 @@ ppc_process_record_op63 (struct gdbarch *gdbarch, struct regcache *regcache,
 	  case 22:	/* Move From FPSCR Control & set RN */
 	  case 23:	/* Move From FPSCR Control & set RN Immediate */
 	    record_full_arch_list_add_reg (regcache, tdep->ppc_fpscr_regnum);
+	    /* Fall through.  */
 	  case 0:	/* Move From FPSCR */
 	  case 24:	/* Move From FPSCR Lightweight */
 	    if (PPC_FIELD (insn, 11, 5) == 0 && PPC_RC (insn))
-- 
2.13.6