On 21/02/17 10:54, Christophe Lyon wrote:
Hi,
On 20 February 2017 at 13:08, Matthew Fortune
<matthew.fort...@imgtec.com> wrote:
Vladimir Makarov <vmaka...@redhat.com> writes:
On 02/07/2017 09:08 AM, Matthew Fortune wrote:
Hi,
This change deals with reloading a subreg(reg) using the inner mode to
prevent partial spilling of data like in the case described here:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78660#c8
No test case for now but I am investigating a targeted test using the
RTL frontend for later submission.
gcc/
PR target/78660
* lra-constraints.c (curr_insn_transform): Handle
WORD_REGISTER_OPERATIONS requirements when reloading SUBREGs.
The patch is OK. So all 5 patches can be committed to the trunk. I
hope Eric's test of the patches on SPARC will be successful. Thank you
again for your efforts.
Committed as r245598.
This patch is causing ICEs on arm-none-linux-gnueabi
FAIL: gcc.c-torture/execute/simd-2.c -O1 (internal compiler error)
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.c-torture/execute/simd-2.c:
In function 'main':
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.c-torture/execute/simd-2.c:72:1:
error: unable to find a register to spill
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.c-torture/execute/simd-2.c:72:1:
error: this is the insn:
(insn 276 2123 2129 2 (set (subreg:SI (reg:TI 886 [362]) 0)
(and:SI (subreg:SI (reg:TI 567 [orig:111 j.1_2 ] [111]) 0)
(subreg:SI (reg:TI 568 [orig:110 i.0_1 ] [110]) 0)))
"/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.c-torture/execute/simd-2.c":47
82 {*arm_andsi3_insn}
(expr_list:REG_DEAD (reg:TI 568 [orig:110 i.0_1 ] [110])
(expr_list:REG_DEAD (reg:TI 567 [orig:111 j.1_2 ] [111])
(nil))))
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.c-torture/execute/simd-2.c:72:1:
internal compiler error: in assign_by_spills, at lra-assigns.c:1457
0xacc9d3 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*)
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/rtl-error.c:108
0x9a6123 assign_by_spills
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/lra-assigns.c:1457
0x9a7506 lra_assign()
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/lra-assigns.c:1643
0x9a16d4 lra(_IO_FILE*)
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/lra.c:2451
0x957669 do_reload
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/ira.c:5452
0x957669 execute
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/ira.c:5636
I've also noticed that --target arm-none-eabi with default --with-mode
and --with-cpu
fails to build libgcc (it may be easier to reproduce):
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libgcc/fixed-bit.c:
In function '__gnu_mulhelperudq':
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libgcc/fixed-bit.c:371:1:
error: unable to find a register to spill
}
^
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libgcc/fixed-bit.c:371:1:
error: this is the insn:
(insn 286 296 287 2 (set (reg:SI 232)
(neg:SI (ltu:SI (subreg:SI (reg:DI 238 [orig:119 _10 ] [119]) 4)
(subreg:SI (reg/v:DI 149 [ temp1 ]) 4))))
"/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libgcc/fixed-bit.c":314
849 {cstor
esi_nltu_thumb1}
(expr_list:REG_DEAD (reg:DI 238 [orig:119 _10 ] [119])
(nil)))
This looks like PR 79660 that Richard just filed.
Kyrill
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libgcc/fixed-bit.c:371:1:
internal compiler error: in assign_by_spills, at lra-assigns.c:1457
0xacc9c3 _fatal_insn(char const*, rtx_def const*, char const*, int, char const*)
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/rtl-error.c:108
0x9a6113 assign_by_spills
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/lra-assigns.c:1457
0x9a74f6 lra_assign()
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/lra-assigns.c:1643
0x9a16c4 lra(_IO_FILE*)
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/lra.c:2451
0x957659 do_reload
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/ira.c:5452
0x957659 execute
/tmp/870921_29.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/ira.c:5636
make[4]: *** [_mulhelperUDQ.o] Error 1
Thanks,
Christophe
Thanks,
Matthew
