[Bug rtl-optimization/48826] ICE in dwarf2out_var_location, at dwarf2out.c:22013
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48826
baoshan pangbw at gmail dot com changed:
What|Removed |Added
CC||pangbw at gmail dot com
--- Comment #10 from baoshan pangbw at gmail dot com ---
The code is broken in the latest code because beside NOTE instruction there
could be BARRIER too, for instance the RTX list I am seeing:
(call_insn 32 35 33 (parallel [
(set (reg:SI 2 $2)
(call (mem:SI (reg:SI 25 $25 [198]) [0 S4 A32])
(const_int 16 [0x10])))
(clobber (reg:SI 31 $31))
(clobber (reg:SI 28 $28))
]) min.c:20 603 {call_value_split}
(nil)
(expr_list (use (reg:SI 79 $fakec))
(expr_list (use (reg:SI 28 $28))
(expr_list:SI (use (reg:SI 5 $5))
(expr_list:SI (use (reg:SI 4 $4))
(nil))
(insn 33 32 34 (set (reg:SI 28 $28)
(mem/c:SI (plus:SI (reg/f:SI 29 $sp)
(const_int 16 [0x10])) [0 S4 A32])) min.c:20 288
{*movsi_internal}
(nil))
(barrier 34 33 18)
(barrier 18 34 30)
(note 30 18 21 (expr_list:REG_DEP_TRUE (concat:SI (pc)
(unspec:SI [
(reg:SI 28 $28)
(const:SI (unspec:SI [
(symbol_ref:SI (signal) [flags 0x41]
function_decl 0xb71f6700 signal)
] 227))
(reg:SI 79 $fakec)
] UNSPEC_LOAD_CALL))
(expr_list:REG_DEP_TRUE (concat:SI (reg:SI 5 $5)
(const_int 0 [0]))
(expr_list:REG_DEP_TRUE (concat:SI (reg:SI 4 $4)
(const_int 2 [0x2]))
(nil NOTE_INSN_CALL_ARG_LOCATION)
(note 21 30 0 NOTE_INSN_DELETED)
[Bug rtl-optimization/48826] ICE in dwarf2out_var_location, at dwarf2out.c:22013
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48826
--- Comment #11 from baoshan pangbw at gmail dot com ---
And I don't thing it is the best place to fix this bug in function try_split().
Why not fix it at where the ICE occurs? It is just the wrong expectation from
function dwarf2out_var_location(). Why not just look forward further if the
'prev'is not what we want? I like to add this code before gcc_assert() to fix
this issue:
while(prev !CALL_P(prev) !(GET_CODE (PATTERN (prev)) == SEQUENCE
CALL_P (XVECEXP (PATTERN (prev), 0, 0{
gcc_assert(NONJUMP_INSN_P (prev));
prev = prev_real_insn (prev);
}
[Bug rtl-optimization/48826] ICE in dwarf2out_var_location, at dwarf2out.c:22013
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48826
--- Comment #9 from Ryan Mansfield rmansfield at qnx dot com 2011-05-26
14:20:54 UTC ---
Richard, thanks for your patch. It fixed most of the failures I saw but there
are still cases where the note doesn't get moved after call split. The
following example ICEs with rev174285.
void foo ()
{
int *const pc = __builtin_return_address (0);
bar (pc);
}
[Bug rtl-optimization/48826] ICE in dwarf2out_var_location, at dwarf2out.c:22013
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48826 --- Comment #6 from rsandifo at gcc dot gnu.org rsandifo at gcc dot gnu.org 2011-05-23 17:57:38 UTC --- Author: rsandifo Date: Mon May 23 17:57:35 2011 New Revision: 174080 URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=174080 Log: gcc/ PR rtl-optimization/48826 * emit-rtl.c (try_split): When splitting a call that is followed by a NOTE_INSN_CALL_ARG_LOCATION, move the note after the new call. Modified: trunk/gcc/ChangeLog trunk/gcc/emit-rtl.c
[Bug rtl-optimization/48826] ICE in dwarf2out_var_location, at dwarf2out.c:22013
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48826 rsand...@gcc.gnu.org rsandifo at gcc dot gnu.org changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution||FIXED --- Comment #7 from rsandifo at gcc dot gnu.org rsandifo at gcc dot gnu.org 2011-05-23 18:24:31 UTC --- Fixed on trunk.
[Bug rtl-optimization/48826] ICE in dwarf2out_var_location, at dwarf2out.c:22013
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48826 rsand...@gcc.gnu.org rsandifo at gcc dot gnu.org changed: What|Removed |Added CC||aldot at gcc dot gnu.org --- Comment #8 from rsandifo at gcc dot gnu.org rsandifo at gcc dot gnu.org 2011-05-23 18:27:33 UTC --- *** Bug 48843 has been marked as a duplicate of this bug. ***
[Bug rtl-optimization/48826] ICE in dwarf2out_var_location, at dwarf2out.c:22013
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48826 rsand...@gcc.gnu.org rsandifo at gcc dot gnu.org changed: What|Removed |Added Status|UNCONFIRMED |ASSIGNED Last reconfirmed||2011.05.22 21:06:18 CC||rsandifo at gcc dot gnu.org Component|debug |rtl-optimization AssignedTo|unassigned at gcc dot |rsandifo at gcc dot gnu.org |gnu.org | Ever Confirmed|0 |1 --- Comment #5 from rsandifo at gcc dot gnu.org rsandifo at gcc dot gnu.org 2011-05-22 21:06:18 UTC --- About to post a patch.
