[U-Boot] [PATCH] powerpc/mpc85xx:Add GCC flag -fno-delete-null-pointer-checks

[Prabhakar Kushwaha]

 -fdelete-null-pointer-checks flag controls global dataflow analyses and
 eliminate useless checks for null pointers; It assume that if a pointer is
 checked after it has already been dereferenced, it cannot be null.
 This flag is enabled by default.

 gcc v4.9 has more optimizations added to this option. Hence it is very
 aggressive with GCC v4.9 series. Add -fno-delete-null-pointer-checks to
 disable the optimization

Signed-off-by: Rohit Dharmakan <rohitarulraj at freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
---
 arch/powerpc/cpu/mpc85xx/config.mk | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/cpu/mpc85xx/config.mk b/arch/powerpc/cpu/mpc85xx/config.mk
index 72c964c..2aedd24 100644
--- a/arch/powerpc/cpu/mpc85xx/config.mk
+++ b/arch/powerpc/cpu/mpc85xx/config.mk
@@ -5,7 +5,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-PLATFORM_CPPFLAGS += -Wa,-me500 -msoft-float -mno-string
+PLATFORM_CPPFLAGS += -Wa,-me500 -msoft-float -mno-string \
+					-fno-delete-null-pointer-checks
 
 # -mspe=yes is needed to have -mno-spe accepted by a buggy GCC;
 # see "[PATCH,rs6000] make -mno-spe work as expected" on
-- 
1.9.1