https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104961
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2022-03-16
Priority|P3 |P2
CC| |mpolacek at gcc dot gnu.org
Target Milestone|--- |9.5
Summary|compilation never (?) |[9/10/11/12 Regression]
|finishes at -Og |compilation never (?)
| |finishes at -Og
Status|UNCONFIRMED |NEW
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed. Started with
commit 7293e3f58edb7535d826c85160b9fa6d4132ffea
Author: Vladimir Makarov <[email protected]>
Date: Fri Mar 16 18:48:26 2018 +0000
re PR target/84876 (ICE on invalid code in lra_assign at
gcc/lra-assigns.c:1601 since r258504)
2018-03-16 Vladimir Makarov <[email protected]>
PR target/84876
* lra-assigns.c (lra_split_hard_reg_for): Don't use
regno_allocno_class_array and sorted_pseudos.
* lra-constraints.c (spill_hard_reg_in_range): Ignore hard regs in
insns where regno is used.
2018-03-16 Vladimir Makarov <[email protected]>
PR target/84876
* gcc.target/i386/pr84876.c: New test.
From-SVN: r258602
which fixed an ICE:
/home/mpolacek/q.c: In function ‘foo’:
/home/mpolacek/q.c:12:1: error: unable to find a register to spill
}
^
/home/mpolacek/q.c:12:1: error: this is the insn:
(insn 15 32 33 2 (parallel [
(set (reg/v:TI 105 [orig:91 j ] [91])
(mult:TI (zero_extend:TI (subreg/j:DI (reg/v:TI 105 [orig:91 j
] [91]) 0))
(zero_extend:TI (reg:DI 102 [ i.0_1 ]))))
(clobber (reg:CC 17 flags))
]) "/home/mpolacek/q.c":8 356 {*umulditi3_1}
(expr_list:REG_DEAD (reg:DI 102 [ i.0_1 ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil))))
during RTL pass: reload
/home/mpolacek/q.c:12:1: internal compiler error: in lra_split_hard_reg_for, at
lra-assigns.c:1805
unrecognized DWARF version in .debug_info at 6
0xf1752d _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
../../gcc/rtl-error.c:108
0xd773ae lra_split_hard_reg_for()
../../gcc/lra-assigns.c:1805
0xd6fcb8 lra(_IO_FILE*)
../../gcc/lra.c:2507
0xd17143 do_reload
../../gcc/ira.c:5465
0xd17636 execute
../../gcc/ira.c:5649
Compiled fine with GCC 5 -> regression.
