On 14/08/15 19:57, Alexandre Oliva wrote:
I'm glad it appears to be working to everyone's
satisfaction now. I've just committed it as r226901, with only a
context adjustment to account for a change in use_register_for_decl in
function.c. /me crosses fingers :-)
Here's the patch as checked in:
One more failure to report, I'm afraid. On AArch64 Bigendian,
aapcs64/func-ret-4.c ICEs in simplify_subreg (line refs here are from r227348):
In file included from /work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aa
pcs64/func-ret-4.c:14:0:
/work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aapcs64/func-ret-4.c: In
function 'func_return_val_10':
/work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aapcs64/abitest-2.h:12:2
4: internal compiler error: in simplify_subreg, at simplify-rtx.c:5808
/work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aapcs64/abitest-2.h:13:4
0: note: in definition of macro 'FUNC_NAME_COMBINE'
/work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aapcs64/abitest-2.h:15:2
7: note: in expansion of macro 'FUNC_NAME_1'
/work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aapcs64/abitest-2.h:15:3
9: note: in expansion of macro 'FUNC_BASE_NAME'
/work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aapcs64/abitest-2.h:69:3
3: note: in expansion of macro 'FUNC_NAME'
/work/alalaw01/src/gcc/gcc/testsuite/gcc.target/aarch64/aapcs64/func-ret-4.c:23:
1: note: in expansion of macro 'FUNC_VAL_CHECK'
0xa7ba44 simplify_subreg(machine_mode, rtx_def*, machine_mode, unsigned int)
/work/alalaw01/src/gcc/gcc/simplify-rtx.c:5808
0xa7c4ef simplify_gen_subreg(machine_mode, rtx_def*, machine_mode, unsigned int)
/work/alalaw01/src/gcc/gcc/simplify-rtx.c:6031
0x7ad097 operand_subword(rtx_def*, unsigned int, int, machine_mode)
/work/alalaw01/src/gcc/gcc/emit-rtl.c:1611
0x7def4e move_block_from_reg(int, rtx_def*, int)
/work/alalaw01/src/gcc/gcc/expr.c:1536
0x83a494 assign_parm_setup_block
/work/alalaw01/src/gcc/gcc/function.c:3117
0x841a43 assign_parms
/work/alalaw01/src/gcc/gcc/function.c:3857
0x842ffa expand_function_start(tree_node*)
/work/alalaw01/src/gcc/gcc/function.c:5286
0x6e7496 execute
/work/alalaw01/src/gcc/gcc/cfgexpand.c:6203
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
FAIL: gcc.target/aarch64/aapcs64/func-ret-4.c compilation, -O1 (internal
compiler error)
Also at -O2, -O3 -g, -Og -g, -Os. -O0 is OK.
simplify_subreg is called with outermode=DImode, op=
(concat:CHI (reg:HI 76 [ t ])
(reg:HI 77 [ t+2 ]))
innermode = BLKmode (which violates the assertion), byte=0.
move_block_from_reg (in expr.c) calls operand_subword(x, i, 1, BLKmode), here
i=0 and x is the concat:CHI above, and operand_subword doesn't handle that case
(well, it passes it onto simplify_subreg).
In assign_parm_setup_block, I see 'mem = validize_mem (copy_rtx (stack_parm))'
where stack_parm is again the same concat:CHI.
This should be easily reproducible with a stage 1 compiler
(aarch64_be-none-elf).
--Alan
