[PATCH 07/15] arm64: use -mno-implicit-float instead of -mgeneral-regs-only
From: Nick Desaulniers <hidden>
Date: 2017-11-03 17:50:12
Also in:
lkml
I think this bug was fixed upstream in LLVM. Do we still want to take this workaround? On Fri, Nov 3, 2017 at 10:11 AM, Sami Tolvanen [off-list ref] wrote:
quoted hunk ↗ jump to hunk
From: Greg Hackmann <redacted> 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 <redacted> Cc: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> --- 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
-- Thanks, ~Nick Desaulniers