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* [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2
@ 2022-05-19 6:18 asolokha at gmx dot com
2022-05-19 6:21 ` [Bug debug/105653] " rguenth at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: asolokha at gmx dot com @ 2022-05-19 6:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105653
Bug ID: 105653
Summary: [10/11/12/13 Regression] '-fcompare-debug' failure w/
-O2
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: compare-debug-failure
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: aarch64-linux-gnu
Created attachment 52992
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52992&action=edit
Testcase
g++ 13.0.0 20220515 snapshot (g:18547874ee205d830acb31f1e3c1c89fc7725c14) fails
-fcompare-debug check when compiling the attached testcase w/ -O2:
% aarch64-linux-gnu-g++-13.0.0 -O2 -fcompare-debug -c q9dyty2d.cpp
aarch64-linux-gnu-g++-13.0.0: error: q9dyty2d.cpp: '-fcompare-debug' failure
(length)
gkd diff:
--- q9dyty2d.cpp.gkd 2022-05-19 13:16:40.109118502 +0700
+++ q9dyty2d.gk.cpp.gkd 2022-05-19 13:16:40.167118178 +0700
@@ -729,9 +729,7 @@
(insn:TI # 0 0 (set (reg/f:DI 3 x3 [orig:113 MEM[(struct btVector3 * *)_31 +
8B] ] [113])
(mem/f:DI (plus:DI (reg:DI 2 x2 [orig:101 D.xxxx ] [101])
(const_int 8 [0x8])) [ MEM[(struct btVector3 * *)_31 + 8B]+0
S8 A64])) "q9dyty2d.cpp":39:17# {*movdi_aarch64}
- (expr_list:REG_EQUIV (mem/f:DI (plus:DI (reg:DI 2 x2 [orig:101 D.xxxx ]
[101])
- (const_int 8 [0x8])) [ MEM[(struct btVector3 * *)_31 + 8B]+0
S8 A64])
- (nil)))
+ (nil))
(jump_insn:TI # 0 0 (set (pc)
(if_then_else (ne (reg/f:DI 3 x3 [orig:113 MEM[(struct btVector3 *
*)_31 + 8B] ] [113])
(const_int 0 [0]))
@@ -899,9 +897,7 @@
(insn:TI # 0 0 (set (reg/f:DI 3 x3 [orig:112 MEM[(struct btVector3 * *)_30 +
8B] ] [112])
(mem/f:DI (plus:DI (reg:DI 2 x2 [orig:101 D.xxxx ] [101])
(const_int 8 [0x8])) [ MEM[(struct btVector3 * *)_30 + 8B]+0
S8 A64])) "q9dyty2d.cpp":39:17# {*movdi_aarch64}
- (expr_list:REG_EQUIV (mem/f:DI (plus:DI (reg:DI 2 x2 [orig:101 D.xxxx ]
[101])
- (const_int 8 [0x8])) [ MEM[(struct btVector3 * *)_30 + 8B]+0
S8 A64])
- (nil)))
+ (nil))
(jump_insn:TI # 0 0 (set (pc)
(if_then_else (ne (reg/f:DI 3 x3 [orig:112 MEM[(struct btVector3 *
*)_30 + 8B] ] [112])
(const_int 0 [0]))
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug debug/105653] [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2
2022-05-19 6:18 [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2 asolokha at gmx dot com
@ 2022-05-19 6:21 ` rguenth at gcc dot gnu.org
2022-06-28 10:49 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-19 6:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105653
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |10.4
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug debug/105653] [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2
2022-05-19 6:18 [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2 asolokha at gmx dot com
2022-05-19 6:21 ` [Bug debug/105653] " rguenth at gcc dot gnu.org
@ 2022-06-28 10:49 ` jakub at gcc dot gnu.org
2022-08-03 3:03 ` [Bug rtl-optimization/105653] " asolokha at gmx dot com
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2022-06-28 10:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105653
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.4 |10.5
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 10.4 is being released, retargeting bugs to GCC 10.5.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/105653] [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2
2022-05-19 6:18 [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2 asolokha at gmx dot com
2022-05-19 6:21 ` [Bug debug/105653] " rguenth at gcc dot gnu.org
2022-06-28 10:49 ` jakub at gcc dot gnu.org
@ 2022-08-03 3:03 ` asolokha at gmx dot com
2022-10-27 0:42 ` pinskia at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: asolokha at gmx dot com @ 2022-08-03 3:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105653
--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
Created attachment 53403
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53403&action=edit
A shorter testcase
% aarch64-linux-gnu-g++-13.0.0 -O2 -fcompare-debug -fno-gcse -c wo91465u.cpp
aarch64-linux-gnu-g++-13.0.0: error: wo91465u.cpp: '-fcompare-debug' failure
(length)
--- wo91465u.cpp.gkd 2022-08-03 10:02:59.526593546 +0700
+++ wo91465u.gk.cpp.gkd 2022-08-03 10:02:59.554593642 +0700
@@ -47,10 +47,7 @@
(zero_extend:DI (mem:SI (plus:DI (mult:DI (reg:DI 1 x1 [orig:96 D.xxxx
] [96])
(const_int 4 [0x4]))
(reg/f:DI 4 x4 [orig:93 _7 ] [93])) [ MEM[(int *)_7 +
ivtmp.6_16 * 4]+0 S4 A32]))) "wo91465u.cpp":10:7# {*zero_extendsidi2_aarch64}
- (expr_list:REG_EQUIV (mem:SI (plus:DI (mult:DI (reg:DI 1 x1 [orig:96
D.xxxx ] [96])
- (const_int 4 [0x4]))
- (reg/f:DI 4 x4 [orig:93 _7 ] [93])) [ MEM[(int *)_7 +
ivtmp.6_16 * 4]+0 S4 A32])
- (nil)))
+ (nil))
(jump_insn:TI # 0 0 (set (pc)
(if_then_else (eq (reg:SI 2 x2 [orig:104 MEM[(int *)_7 + ivtmp.6_16 *
4] ] [104])
(const_int 0 [0]))
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/105653] [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2
2022-05-19 6:18 [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2 asolokha at gmx dot com
` (2 preceding siblings ...)
2022-08-03 3:03 ` [Bug rtl-optimization/105653] " asolokha at gmx dot com
@ 2022-10-27 0:42 ` pinskia at gcc dot gnu.org
2022-12-20 13:46 ` rguenth at gcc dot gnu.org
2023-07-07 10:43 ` [Bug rtl-optimization/105653] [11/12/13/14 " rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: pinskia at gcc dot gnu.org @ 2022-10-27 0:42 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105653
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2022-10-27
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
IRA adds the REG_EQUIV note even for both with/without -g.
But it was removed in peephole2 for -g case.
In the -g case we get the following extra output in -g for peephole2 starting
with:
df_worklist_dataflow_doublequeue: n_basic_blocks 8 n_edges 10 count 9 ( 1.1)
....
DCE: Deleting insn 15
deleting insn with uid = 15.
...
insn 15 was:
(insn:TI 15 13 16 2 (set (reg/f:DI 1 x1 [101])
(plus:DI (reg/f:DI 0 x0 [orig:99 thisD.4083 ] [99])
(const_int 8 [0x8]))) "/app/example.cpp":9:25 discrim 1 141
{*adddi3_aarch64}
(expr_list:REG_UNUSED (reg/f:DI 1 x1 [101])
(nil)))
in sched_fusion.
But in the -g0 case, it was not removed inside peephole2.
Someone who understands DF DCE better should look into this on why it was not
removed inside peephole2 without -g.
The instruction without -g:
(insn:TI 8 3 9 2 (set (reg/f:DI 1 x1 [101])
(plus:DI (reg/f:DI 0 x0 [orig:99 this ] [99])
(const_int 8 [0x8]))) "/app/example.cpp":9:25 discrim 1 141
{*adddi3_aarch64}
(expr_list:REG_UNUSED (reg/f:DI 1 x1 [101])
(nil)))
Which looks exactly the same even.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/105653] [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2
2022-05-19 6:18 [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2 asolokha at gmx dot com
` (3 preceding siblings ...)
2022-10-27 0:42 ` pinskia at gcc dot gnu.org
@ 2022-12-20 13:46 ` rguenth at gcc dot gnu.org
2023-07-07 10:43 ` [Bug rtl-optimization/105653] [11/12/13/14 " rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-12-20 13:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105653
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug rtl-optimization/105653] [11/12/13/14 Regression] '-fcompare-debug' failure w/ -O2
2022-05-19 6:18 [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2 asolokha at gmx dot com
` (4 preceding siblings ...)
2022-12-20 13:46 ` rguenth at gcc dot gnu.org
@ 2023-07-07 10:43 ` rguenth at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2023-07-07 10:43 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105653
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|10.5 |11.5
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 10 branch is being closed.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2023-07-07 10:43 UTC | newest]
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2022-05-19 6:18 [Bug debug/105653] New: [10/11/12/13 Regression] '-fcompare-debug' failure w/ -O2 asolokha at gmx dot com
2022-05-19 6:21 ` [Bug debug/105653] " rguenth at gcc dot gnu.org
2022-06-28 10:49 ` jakub at gcc dot gnu.org
2022-08-03 3:03 ` [Bug rtl-optimization/105653] " asolokha at gmx dot com
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2022-12-20 13:46 ` rguenth at gcc dot gnu.org
2023-07-07 10:43 ` [Bug rtl-optimization/105653] [11/12/13/14 " rguenth at gcc dot gnu.org
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