[PATCH][GCC-10 Backport] arm: Fix unintentional fall throughs in arm.c

[Srinath Parvathaneni]

Hi all,

This small patch fix some unintentional fall-throughs in
`mve_vector_mem_operand'.

Regtested and bootstraped on arm-linux-gnueabihf.

Okay for GCC-10 branch?

Regards,
Srinath

gcc/ChangeLog

2020-06-09  Srinath Parvathaneni  <srinath.parvathan...@arm.com>

        Backported from mainline
        2020-05-28  Andrea Corallo  <andrea.cora...@arm.com>

        * config/arm/arm.c (mve_vector_mem_operand): Fix unwanted
        fall-throughs.


###############     Attachment also inlined for ease of reply    ###############


diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 
01bc1b8ae9b72700ca5ae0840ee4496fd686b623..a7b7c55a763c66382bc140a4c504840c509df84c
 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -13302,26 +13302,31 @@ mve_vector_mem_operand (machine_mode mode, rtx op, 
bool strict)
            if (abs_hwi (val))
              return ((reg_no < LAST_ARM_REGNUM && reg_no != SP_REGNUM)
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V8HImode:
          case E_V8HFmode:
            if (abs (val) <= 255)
              return ((reg_no < LAST_ARM_REGNUM && reg_no != SP_REGNUM)
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V8QImode:
          case E_V4QImode:
            if (abs_hwi (val))
              return (reg_no <= LAST_LO_REGNUM
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V4HImode:
          case E_V4HFmode:
            if (val % 2 == 0 && abs (val) <= 254)
              return (reg_no <= LAST_LO_REGNUM
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V4SImode:
          case E_V4SFmode:
            if (val % 4 == 0 && abs (val) <= 508)
              return ((reg_no < LAST_ARM_REGNUM && reg_no != SP_REGNUM)
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V2DImode:
          case E_V2DFmode:
          case E_TImode:


diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 
01bc1b8ae9b72700ca5ae0840ee4496fd686b623..a7b7c55a763c66382bc140a4c504840c509df84c
 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -13302,26 +13302,31 @@ mve_vector_mem_operand (machine_mode mode, rtx op, 
bool strict)
            if (abs_hwi (val))
              return ((reg_no < LAST_ARM_REGNUM && reg_no != SP_REGNUM)
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V8HImode:
          case E_V8HFmode:
            if (abs (val) <= 255)
              return ((reg_no < LAST_ARM_REGNUM && reg_no != SP_REGNUM)
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V8QImode:
          case E_V4QImode:
            if (abs_hwi (val))
              return (reg_no <= LAST_LO_REGNUM
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V4HImode:
          case E_V4HFmode:
            if (val % 2 == 0 && abs (val) <= 254)
              return (reg_no <= LAST_LO_REGNUM
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V4SImode:
          case E_V4SFmode:
            if (val % 4 == 0 && abs (val) <= 508)
              return ((reg_no < LAST_ARM_REGNUM && reg_no != SP_REGNUM)
                      || (!strict && reg_no >= FIRST_PSEUDO_REGISTER));
+           return FALSE;
          case E_V2DImode:
          case E_V2DFmode:
          case E_TImode: