[binutils-gdb] gdb/arm: Use if-else if instead of switch

[binutils-gdb] gdb/arm: Use if-else if instead of switch

[Yvan Roux]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=42e11f363c5e2c5e750e9b9b67fbae511d83974d

commit 42e11f363c5e2c5e750e9b9b67fbae511d83974d
Author: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
Date:   Mon Jul 25 14:51:58 2022 +0200

    gdb/arm: Use if-else if instead of switch
    
    As the register numbers for the alternative Arm SP registers are not
    constant, it's not possible to use switch statement to define the
    rules.  In order to not have a mix, replace the few existing
    switch statements with regular if-else if statements

Diff:
---
 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