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* [Bug tree-optimization/97098] New: vect_bb_slp_mark_live_stmts() loops forever on test case using -O3
@ 2020-09-17 21:39 bergner at gcc dot gnu.org
2020-09-17 21:47 ` [Bug tree-optimization/97098] " bergner at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bergner at gcc dot gnu.org @ 2020-09-17 21:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97098
Bug ID: 97098
Summary: vect_bb_slp_mark_live_stmts() loops forever on test
case using -O3
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: bergner at gcc dot gnu.org
Target Milestone: ---
Created attachment 49237
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49237&action=edit
preprocessed test case
GCC trunk hangs on the attached test case (from OpenMP) when compiling with -O3
(powerpc64le-linux). Compiling with -O2 is fine.
Using the debugger and breaking into the compile multiple times, the compiler
always has the following backtrace:
(gdb) c
Continuing.
^C
Program received signal SIGINT, Interrupt.
0x0000000011813e54 in link_use_stmts_after (head=0x7ffff5c40448,
imm=0x7fffffff5c20)
at /home/bergner/gcc/gcc-fsf-mainline-mma/gcc/ssa-iterators.h:908
908 FOR_EACH_SSA_USE_OPERAND (use_p, head_stmt, op_iter, flag)
(gdb) bt
#0 0x0000000011813e54 in link_use_stmts_after (head=0x7ffff5c40448,
imm=0x7fffffff5c20)
at /home/bergner/gcc/gcc-fsf-mainline-mma/gcc/ssa-iterators.h:908
#1 0x000000001181413c in next_imm_use_stmt (imm=0x7fffffff5c20) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/ssa-iterators.h:961
#2 0x00000000118223a4 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x136955f0, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3107
#3 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x13695660, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
#4 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x136956d0, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
#5 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x13695740, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
#6 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x13695820, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
#7 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x13695890, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
#8 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x1369a1f0, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
#9 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x1369a2d0, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
#10 0x0000000011822464 in vect_bb_slp_mark_live_stmts (bb_vinfo=0x133aae60,
node=0x1369a340, instance=0x133a1830, cost_vec=0x133a1858,
svisited=...) at
/home/bergner/gcc/gcc-fsf-mainline-mma/gcc/tree-vect-slp.c:3128
...
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/97098] vect_bb_slp_mark_live_stmts() loops forever on test case using -O3
2020-09-17 21:39 [Bug tree-optimization/97098] New: vect_bb_slp_mark_live_stmts() loops forever on test case using -O3 bergner at gcc dot gnu.org
@ 2020-09-17 21:47 ` bergner at gcc dot gnu.org
2020-09-18 6:14 ` rguenth at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bergner at gcc dot gnu.org @ 2020-09-17 21:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97098
--- Comment #1 from Peter Bergner <bergner at gcc dot gnu.org> ---
Added richi to CC since vect_bb_slp_mark_live_stmts() is a new function he
recently added.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/97098] vect_bb_slp_mark_live_stmts() loops forever on test case using -O3
2020-09-17 21:39 [Bug tree-optimization/97098] New: vect_bb_slp_mark_live_stmts() loops forever on test case using -O3 bergner at gcc dot gnu.org
2020-09-17 21:47 ` [Bug tree-optimization/97098] " bergner at gcc dot gnu.org
@ 2020-09-18 6:14 ` rguenth at gcc dot gnu.org
2020-09-18 6:36 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-09-18 6:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97098
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-09-18
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Ever confirmed|0 |1
Status|UNCONFIRMED |ASSIGNED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Mine.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/97098] vect_bb_slp_mark_live_stmts() loops forever on test case using -O3
2020-09-17 21:39 [Bug tree-optimization/97098] New: vect_bb_slp_mark_live_stmts() loops forever on test case using -O3 bergner at gcc dot gnu.org
2020-09-17 21:47 ` [Bug tree-optimization/97098] " bergner at gcc dot gnu.org
2020-09-18 6:14 ` rguenth at gcc dot gnu.org
@ 2020-09-18 6:36 ` rguenth at gcc dot gnu.org
2020-09-18 7:22 ` cvs-commit at gcc dot gnu.org
2020-09-18 7:31 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-09-18 6:36 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97098
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dimhen at gmail dot com
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
*** Bug 97087 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/97098] vect_bb_slp_mark_live_stmts() loops forever on test case using -O3
2020-09-17 21:39 [Bug tree-optimization/97098] New: vect_bb_slp_mark_live_stmts() loops forever on test case using -O3 bergner at gcc dot gnu.org
` (2 preceding siblings ...)
2020-09-18 6:36 ` rguenth at gcc dot gnu.org
@ 2020-09-18 7:22 ` cvs-commit at gcc dot gnu.org
2020-09-18 7:31 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-09-18 7:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97098
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:080ddd8a81ea39e92542fa7d7e2d7d27ee741710
commit r11-3275-g080ddd8a81ea39e92542fa7d7e2d7d27ee741710
Author: Richard Biener <rguenther@suse.de>
Date: Fri Sep 18 09:00:12 2020 +0200
tree-optimization/97098 - fix compile-time hog in SLP live
This fixes a missed early-out in SLP live stmt marking when
all scalar stmts were already visited (oops).
2020-09-18 Richard Biener <rguenther@suse.de>
PR tree-optimization/97098
* tree-vect-slp.c (vect_bb_slp_mark_live_stmts): Do not
recurse to children when all stmts were already visited.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/97098] vect_bb_slp_mark_live_stmts() loops forever on test case using -O3
2020-09-17 21:39 [Bug tree-optimization/97098] New: vect_bb_slp_mark_live_stmts() loops forever on test case using -O3 bergner at gcc dot gnu.org
` (3 preceding siblings ...)
2020-09-18 7:22 ` cvs-commit at gcc dot gnu.org
@ 2020-09-18 7:31 ` rguenth at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-09-18 7:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97098
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2020-09-18 7:31 UTC | newest]
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2020-09-17 21:39 [Bug tree-optimization/97098] New: vect_bb_slp_mark_live_stmts() loops forever on test case using -O3 bergner at gcc dot gnu.org
2020-09-17 21:47 ` [Bug tree-optimization/97098] " bergner at gcc dot gnu.org
2020-09-18 6:14 ` rguenth at gcc dot gnu.org
2020-09-18 6:36 ` rguenth at gcc dot gnu.org
2020-09-18 7:22 ` cvs-commit at gcc dot gnu.org
2020-09-18 7:31 ` rguenth at gcc dot gnu.org
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