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ANDROID: HACK: arm64: use -mno-implicit-float instead of -mgeneral-regs-only

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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.

Drop this patch once the clang bug has been fixed.

Change-Id: I89fda12d826783ffe18142ba048ff10bd769e240
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>

[AmitP: Refactored the changes to align with changes from upstream commit
        bbb56c27228d ("arm64: Add detection code for broken .inst support in binutils")]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
This commit is contained in:
Greg Hackmann 2017-04-10 11:23:25 -07:00 committed by Amit Pundir
parent b9b964626e
commit 1416d1c439
1 changed files with 8 additions and 1 deletions
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9
arch/arm64/Makefile
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@ -45,7 +45,14 @@ $(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.
# TODO: revert when this is fixed in LLVM.
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_CFLAGS += -fno-pic