[PATCH v3 1/2] gdb/arm: Use if-else if instead of switch

["Torbjörn SVENSSON" <torbjorn.svensson@foss.st.com>]

As the register number for the alternative Arm SP register are not
contstant, it's not possible to use switch statement to define the
rules. In order to not have a mix, replace the few existing
switch-statement with regular if-else if statments.
This patch is a preparation for the next one in the series.

Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
---
 gdb/arm-tdep.c | 25 ++++++++++---------------
 1 file changed, 10 insertions(+), 15 deletions(-)

diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index d3b4fce98a3..7d0944f9e3f 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -3785,9 +3785,8 @@ arm_dwarf2_prev_register (struct frame_info *this_frame, void **this_cache,
   CORE_ADDR lr;
   ULONGEST cpsr;
 
-  switch (regnum)
+  if (regnum == ARM_PC_REGNUM)
     {
-    case ARM_PC_REGNUM:
       /* The PC is normally copied from the return column, which
 	 describes saves of LR.  However, that version may have an
 	 extra bit set to indicate Thumb state.  The bit is not
@@ -3807,18 +3806,18 @@ arm_dwarf2_prev_register (struct frame_info *this_frame, void **this_cache,
       lr = frame_unwind_register_unsigned (this_frame, ARM_LR_REGNUM);
       return frame_unwind_got_constant (this_frame, regnum,
 					arm_addr_bits_remove (gdbarch, lr));
-
-    case ARM_PS_REGNUM:
+    }
+  else if (regnum == ARM_PS_REGNUM)
+    {
       /* Reconstruct the T bit; see arm_prologue_prev_register for details.  */
       cpsr = get_frame_register_unsigned (this_frame, regnum);
       lr = frame_unwind_register_unsigned (this_frame, ARM_LR_REGNUM);
       cpsr = reconstruct_t_bit (gdbarch, lr, cpsr);
       return frame_unwind_got_constant (this_frame, regnum, cpsr);
-
-    default:
-      internal_error (__FILE__, __LINE__,
-		      _("Unexpected register %d"), regnum);
     }
+
+  internal_error (__FILE__, __LINE__,
+		  _("Unexpected register %d"), regnum);
 }
 
 /* Implement the stack_frame_destroyed_p gdbarch method.  */
@@ -4944,17 +4943,13 @@ arm_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
       return;
     }
 
-  switch (regnum)
+  if (regnum == ARM_PC_REGNUM || regnum == ARM_PS_REGNUM)
     {
-    case ARM_PC_REGNUM:
-    case ARM_PS_REGNUM:
       reg->how = DWARF2_FRAME_REG_FN;
       reg->loc.fn = arm_dwarf2_prev_register;
-      break;
-    case ARM_SP_REGNUM:
-      reg->how = DWARF2_FRAME_REG_CFA;
-      break;
     }
+  else if (regnum == ARM_SP_REGNUM)
+    reg->how = DWARF2_FRAME_REG_CFA;
 }
 
 /* Given BUF, which is OLD_LEN bytes ending at ENDADDR, expand
-- 
2.25.1