[gcc(refs/vendors/ARM/heads/arm-perf-staging)] arm: Fix bootstrap failure with rtl-checking

[Tamar Christina]

https://gcc.gnu.org/g:6b6a77d25e83e071ba5d08648c5bd3953d8a0c03

commit 6b6a77d25e83e071ba5d08648c5bd3953d8a0c03
Author: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date:   Mon Apr 27 14:54:46 2020 +0100

    arm: Fix bootstrap failure with rtl-checking
    
    The code change that caused this regression was not meant to affect neon
    code-gen, however I missed the REG fall through.  This patch makes sure we only
    get the left-hand of the PLUS if it is indeed a PLUS expr.
    
    gcc/ChangeLog:
    2020-04-27  Andre Vieira  <andre.simoesdiasvieira@arm.com>
    
            * config/arm/arm.c (output_move_neon): Only get the first operand if
            addr is PLUS.

Diff:
---
 gcc/ChangeLog        | 5 +++++
 gcc/config/arm/arm.c | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bd5e95a9133..0027071f717 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2020-04-27  Andre Vieira  <andre.simoesdiasvieira@arm.com>
+
+	* config/arm/arm.c (output_move_neon): Only get the first operand if
+	addr is PLUS.
+
 2020-04-27  Felix Yang  <felix.yang@huawei.com>
 
 	PR tree-optimization/94784
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 0151bda90d9..74454dddbb9 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -20145,7 +20145,8 @@ output_move_neon (rtx *operands)
 	}
       /* Fall through.  */
     case PLUS:
-      addr = XEXP (addr, 0);
+      if (GET_CODE (addr) == PLUS)
+	addr = XEXP (addr, 0);
       /* Fall through.  */
     case LABEL_REF:
       {