From cb5c9fb0c23a3ecf3e69a5be0e3dc11f1bed148f Mon Sep 17 00:00:00 2001
From: Dave Rodgman <dave.rodgman@arm.com>
Date: Tue, 10 Oct 2023 10:06:02 +0100
Subject: [PATCH] Add volatile to prevent asm being optimised out

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
---
 library/aesce.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/aesce.c b/library/aesce.c
index 752e00822..e36c6d42d 100644
--- a/library/aesce.c
+++ b/library/aesce.c
@@ -568,7 +568,7 @@ static inline uint8x16_t poly_mult_reduce(uint8x16x3_t input)
     /* use 'asm' as an optimisation barrier to prevent loading MODULO from
      * memory. It is for GNUC compatible compilers.
      */
-    asm ("" : "+w" (r));
+    asm volatile ("" : "+w" (r));
 #endif
     uint8x16_t const MODULO = vreinterpretq_u8_u64(vshrq_n_u64(r, 64 - 8));
     uint8x16_t h, m, l; /* input high/middle/low 128b */