On Fri, Nov 03, 2017 at 10:11:52AM -0700, Sami Tolvanen wrote: > From: Greg Hackmann <ghackm...@google.com> > > LLVM bug 30792 causes clang's AArch64 backend to crash compiling > arch/arm64/crypto/aes-ce-cipher.c. Replacing -mgeneral-regs-only with > -mno-implicit-float is the suggested workaround. > > Signed-off-by: Greg Hackmann <ghackm...@google.com> > Cc: Matthias Kaehlcke <m...@chromium.org> > Signed-off-by: Sami Tolvanen <samitolva...@google.com>
Ah, so I guess this is what I was hitting when testing with clang 5.0.0. I was under the impression that this series was jsut enablnig LTO support, not clang support generally. It would be much nicer if we could depend on a fixed clang to start with... Thanks, Mark. > --- > arch/arm64/Makefile | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile > index 939b310913cf..eb6f3c9ec6cb 100644 > --- a/arch/arm64/Makefile > +++ b/arch/arm64/Makefile > @@ -45,7 +45,13 @@ $(warning Detected assembler with broken .inst; > disassembly will be unreliable) > endif > endif > > -KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) > +ifeq ($(cc-name),clang) > +# This is a workaround for https://bugs.llvm.org/show_bug.cgi?id=30792. > +KBUILD_CFLAGS += -mno-implicit-float > +else > +KBUILD_CFLAGS += -mgeneral-regs-only > +endif > +KBUILD_CFLAGS += $(lseinstr) $(brokengasinst) > KBUILD_CFLAGS += -fno-asynchronous-unwind-tables > KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) > KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) > -- > 2.15.0.403.gc27cc4dac6-goog > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-ker...@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
