Scott,
Please comment on this patch.
York
On 05/06/2015 11:07 PM, Prabhakar Kushwaha wrote:
-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@freescale.com Signed-off-by: Prabhakar Kushwaha prabhakar@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