fbb ftbfs on arm64

[Matthias Klose]

see https://bugs.linaro.org/show_bug.cgi?id=610
see https://bugs.debian.org/758964

[Matthias Klose (doko)]

Created attachment 143
preprocessed source

[forwarded from https://bugs.debian.org/758964]

seen with binutils trunk and current gcc-4.9 linaro:

$ gcc -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wall -Wstrict-prototypes -O2 -g -funsigned-char -D__LINUX__ -DPROTOTYPES -I../include -DUSE_NCURSES -D_FORTIFY_SOURCE=2 -c -o md5c.o md5c.c
/tmp/cc5W8BeX.s: Assembler messages:
/tmp/cc5W8BeX.s:609: Error: operand 1 should be an integer register -- `ldr v12,[x1]'
/tmp/cc5W8BeX.s:610: Error: invalid use of vector register at operand 1 -- `eor v12,x6,v12'

[Kumar Venkataramanan (venkataramanan-kumar)]

Also occurs when I tested with with FSF trunk gcc version 5.0.0 20140821 (experimental) (GCC) .

[Kumar Venkataramanan (venkataramanan-kumar)]

Bug occurs in latest trunk as well

gcc version 5.0.0 20140903 (experimental) (GCC).

[Kumar Venkataramanan (venkataramanan-kumar)]

The following patch fixes this bug

Testing in progress

diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index b5be79c..ed6e602 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -4026,7 +4026,7 @@
 })

 (define_insn "stack_protect_test_<mode>"
- [(set (match_operand:PTR 0 "register_operand")
+ [(set (match_operand:PTR 0 "register_operand" "=r")
        (unspec:PTR [(match_operand:PTR 1 "memory_operand" "m")
                     (match_operand:PTR 2 "memory_operand" "m")]
         UNSPEC_SP_TEST))

[Kumar Venkataramanan (venkataramanan-kumar)]

Tested the Patch and sent it to FSF mailing list for review. Once approved I will backport it to GCC 4.9 linaro branch.

 ref: https://gcc.gnu.org/ml/gcc-patches/2014-09/msg00317.html

[Ryan S. Arnold (ryan-arnold)]

https://cards.linaro.org/browse/TCWG-531

[Kumar Venkataramanan (venkataramanan-kumar)]

Patch approved. Need to upstream and back port to linaro 4.9 and FSF 4.9 branches.

[Kumar Venkataramanan (venkataramanan-kumar)]

Fixed in trunk at https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=215004

[Kumar Venkataramanan (venkataramanan-kumar)]

Fixed in Linaro 4.9 branch

https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=215069

[Matthias Klose (doko)]

there still seems to be an issue, as reported in https://bugs.debian.org/758964

[Matthias Klose (doko)]

Created attachment 162
preprocessed source

[Kumar Venkataramanan (venkataramanan-kumar)]

There is a separate bug report opened please see
https://bugs.linaro.org/show_bug.cgi?id=667

I am closing this bug.

[Matthias Klose (doko)]

fixed for 14.10