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Re: [PATCH v2 AArch64]: Re: [PATCH AArch64]: Add constraint letter for stack_protect_test pattern.


Am 17.09.2014 um 00:03 schrieb James Greenhalgh:
> If you have any other suggestions, or if "=&r" is actually correct and
> I am misreading the documentation please let me know.

with this patch I see a lot of ICEs in the testsuite for test cases built with
-O3 (and a build defaulting to -fstack-protector-strong by default), all of the
form:

Executing on host: /home/doko/gcc/4.9/gcc-4.9-4.9.1/build/gcc/xgcc
-B/home/doko/gcc/4.9/gcc-4.9-4.9.1/build/gcc/  -fno-diagnostics-show-caret -fdia
gnostics-color=never   -O3 -fomit-frame-pointer -funroll-all-loops
-finline-functions  -w -c   -o 900116-1.o /home/doko/gcc/4.9/gcc-4.9-4.9.1/src/g
cc/testsuite/gcc.c-torture/compile/900116-1.c    (timeout = 300)
spawn /home/doko/gcc/4.9/gcc-4.9-4.9.1/build/gcc/xgcc
-B/home/doko/gcc/4.9/gcc-4.9-4.9.1/build/gcc/ -fno-diagnostics-show-caret
-fdiagnostics-color
=never -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions -w -c -o
900116-1.o /home/doko/gcc/4.9/gcc-4.9-4.9.1/src/gcc/testsuite/gcc.c-
torture/compile/900116-1.c
/home/doko/gcc/4.9/gcc-4.9-4.9.1/src/gcc/testsuite/gcc.c-torture/compile/900116-1.c:
In function 'zloop':
/home/doko/gcc/4.9/gcc-4.9-4.9.1/src/gcc/testsuite/gcc.c-torture/compile/900116-1.c:14:1:
error: insn does not satisfy its constraints:
(insn 228 225 230 9 (parallel [
            (set (reg:DI 1 x1 [279])
                (unspec:DI [
                        (mem/v/f/c:DI (plus:DI (reg/f:DI 31 sp)
                                (const_int 24 [0x18])) [4 D.2626+0 S8 A64])
                        (mem/v/f/c:DI (reg/f:DI 2 x2 [277]) [4
__stack_chk_guard+0 S8 A64])
                    ] UNSPEC_SP_TEST))
            (clobber (reg:DI 2 x2 [320]))
        ])
/home/doko/gcc/4.9/gcc-4.9-4.9.1/src/gcc/testsuite/gcc.c-torture/compile/900116-1.c:14
741 {stack_protect_test_di}
     (expr_list:REG_DEAD (reg/f:DI 13 x13 [277])
        (expr_list:REG_UNUSED (reg:DI 2 x2 [320])
            (nil))))
/home/doko/gcc/4.9/gcc-4.9-4.9.1/src/gcc/testsuite/gcc.c-torture/compile/900116-1.c:14:1:
internal compiler error: in copyprop_hardreg_forward_1, at regcprop.c:775
Please submit a full bug report,
with preprocessed source if appropriate.

for now only tested with the 4.9 linaro branch, now testing with trunk.

Matthias

Attachment: ts.diff
Description: Text document


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