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* [Bug debug/105070] New: Missing debug info for switch statement
@ 2022-03-27 16:27 liyd2021 at gmail dot com
2022-03-28 7:46 ` [Bug debug/105070] [9/10/11/12 Regression] " rguenth at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: liyd2021 at gmail dot com @ 2022-03-27 16:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
Bug ID: 105070
Summary: Missing debug info for switch statement
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: liyd2021 at gmail dot com
Target Milestone: ---
Affected versions: gcc 11.1.0, since gcc 9
(terminal) $ gcc-9 -v
Using built-in specs.
COLLECT_GCC=gcc-9
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
9.4.0-1ubuntu1~20.04' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-9
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-gnu-unique-object --disable-vtable-verify --enable-plugin
--enable-default-pie --with-system-zlib --with-target-system-zlib=auto
--enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686
--with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib
--with-tune=generic
--enable-offload-targets=nvptx-none=/build/gcc-9-yTrUTS/gcc-9-9.4.0/debian/tmp-nvptx/usr,hsa
--without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04)
Debugging the following program will directly hit "return 1" instead of the
"switch (x)" in this specific case.
Did not observe this problem on other switch-cases.
(terminal) $ cat a.c && gcc -g -OO a.c
extern void abort(void);
int foo(int x) {
switch (x) {
case 1:
case 3:
case 5:
return 1;
default:
return 0;
}
}
int main() {
int i, r;
for (i = 0; i < 6; i++) {
r = foo(i);
if(i == 1 || i == 3 || i == 5){
if(r == 0){
abort();
}
}
}
return 0;
}
--------------------
(terminal) $ gdb a.out
(gdb) b foo
Breakpoint 1 at 0x4011b3: file a.c, line 8.
(gdb) r
Breakpoint 1, foo (x=1) at a.c:8
8 return 1;
(gdb) c
Continuing.
Breakpoint 1, foo (x=3) at a.c:8
8 return 1;
(gdb) c
Continuing.
Breakpoint 1, foo (x=5) at a.c:8
8 return 1;
This bug seemed to be missing debug_line.
(terminal) $ readelf --debug-dump=decodedline a.out
Contents of the .debug_line section:
CU: a.c:
File Line Starting address View Stmt
a.c 3 0x401185 x
a.c 8 0x4011b3 x <-- line 4 is missing
a.c 10 0x4011ba x
a.c 12 0x4011bf x
a.c 14 0x4011c1 x
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug debug/105070] [9/10/11/12 Regression] Missing debug info for switch statement
2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
@ 2022-03-28 7:46 ` rguenth at gcc dot gnu.org
2022-03-28 9:34 ` cvs-commit at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-03-28 7:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Target Milestone|--- |9.5
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org
Last reconfirmed| |2022-03-28
Ever confirmed|0 |1
Summary|Missing debug info for |[9/10/11/12 Regression]
|switch statement |Missing debug info for
| |switch statement
Priority|P3 |P2
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Interestingly all line number info is lost:
int foo (int x)
{
int D.1961;
int _1;
int _3;
int _4;
unsigned int _6;
_Bool _7;
long unsigned int _8;
long unsigned int _9;
_Bool _10;
<bb 2> :
_6 = (unsigned int) x_2(D);
_7 = _6 > 5;
if (_7 != 0)
goto <bb 5>; [20.00%]
else
goto <bb 3>; [80.00%]
<bb 3> :
_8 = 42 >> _6;
_9 = _8 & 1;
_10 = _9 != 0;
if (_10 != 0)
goto <bb 4>; [60.00%]
else
goto <bb 5>; [40.00%]
<bb 4> :
[t.c:8:12] _3 = 1;
[t.c:8:12] goto <bb 6>; [INV]
and the reason is the switchlower pass run at -O0 which does
beginning to process the following SWITCH statement (t.c:4) : -------
switch (x_2(D)) <default: <L3> [INV], case 1: <L0> [INV], case 3: <L0> [INV],
case 5: <L0> [INV]>
;; GIMPLE switch case clusters: BT:1-5
Removing basic block 6
but does not put any locations on the generated stmts.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug debug/105070] [9/10/11/12 Regression] Missing debug info for switch statement
2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
2022-03-28 7:46 ` [Bug debug/105070] [9/10/11/12 Regression] " rguenth at gcc dot gnu.org
@ 2022-03-28 9:34 ` cvs-commit at gcc dot gnu.org
2022-03-28 9:53 ` [Bug debug/105070] [9/10/11 " rguenth at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-03-28 9:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
--- Comment #2 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:bc86a86a4f2c057bc0e0be94dcbb8c128ae7f717
commit r12-7843-gbc86a86a4f2c057bc0e0be94dcbb8c128ae7f717
Author: Richard Biener <rguenther@suse.de>
Date: Mon Mar 28 10:07:53 2022 +0200
tree-optimization/105070 - annotate bit cluster tests with locations
The following makes sure to annotate the tests generated by
switch lowering bit-clustering with locations which otherwise
can be completely lost even at -O0.
2022-03-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/105070
* tree-switch-conversion.h
(bit_test_cluster::hoist_edge_and_branch_if_true): Add location
argument.
* tree-switch-conversion.cc
(bit_test_cluster::hoist_edge_and_branch_if_true): Annotate
cond with location.
(bit_test_cluster::emit): Annotate all generated expressions
with location.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug debug/105070] [9/10/11 Regression] Missing debug info for switch statement
2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
2022-03-28 7:46 ` [Bug debug/105070] [9/10/11/12 Regression] " rguenth at gcc dot gnu.org
2022-03-28 9:34 ` cvs-commit at gcc dot gnu.org
@ 2022-03-28 9:53 ` rguenth at gcc dot gnu.org
2022-04-07 8:58 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-03-28 9:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[9/10/11/12 Regression] |[9/10/11 Regression]
|Missing debug info for |Missing debug info for
|switch statement |switch statement
Known to work| |12.0
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed on trunk sofar.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug debug/105070] [9/10/11 Regression] Missing debug info for switch statement
2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
` (2 preceding siblings ...)
2022-03-28 9:53 ` [Bug debug/105070] [9/10/11 " rguenth at gcc dot gnu.org
@ 2022-04-07 8:58 ` cvs-commit at gcc dot gnu.org
2022-04-21 12:51 ` [Bug debug/105070] [9/10 " cvs-commit at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-04-07 8:58 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:57b62cd299a0ec257141349a114e52f7233be67b
commit r11-9782-g57b62cd299a0ec257141349a114e52f7233be67b
Author: Richard Biener <rguenther@suse.de>
Date: Mon Mar 28 10:07:53 2022 +0200
tree-optimization/105070 - annotate bit cluster tests with locations
The following makes sure to annotate the tests generated by
switch lowering bit-clustering with locations which otherwise
can be completely lost even at -O0.
2022-03-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/105070
* tree-switch-conversion.h
(bit_test_cluster::hoist_edge_and_branch_if_true): Add location
argument.
* tree-switch-conversion.c
(bit_test_cluster::hoist_edge_and_branch_if_true): Annotate
cond with location.
(bit_test_cluster::emit): Annotate all generated expressions
with location.
(cherry picked from commit bc86a86a4f2c057bc0e0be94dcbb8c128ae7f717)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug debug/105070] [9/10 Regression] Missing debug info for switch statement
2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
` (3 preceding siblings ...)
2022-04-07 8:58 ` cvs-commit at gcc dot gnu.org
@ 2022-04-21 12:51 ` cvs-commit at gcc dot gnu.org
2022-05-06 11:09 ` [Bug debug/105070] [9 " cvs-commit at gcc dot gnu.org
2022-05-06 11:10 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-04-21 12:51 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:b285999440c000685c4e4dae9c2a9a8a8fe9e176
commit r10-10542-gb285999440c000685c4e4dae9c2a9a8a8fe9e176
Author: Richard Biener <rguenther@suse.de>
Date: Mon Mar 28 10:07:53 2022 +0200
tree-optimization/105070 - annotate bit cluster tests with locations
The following makes sure to annotate the tests generated by
switch lowering bit-clustering with locations which otherwise
can be completely lost even at -O0.
2022-03-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/105070
* tree-switch-conversion.h
(bit_test_cluster::hoist_edge_and_branch_if_true): Add location
argument.
* tree-switch-conversion.c
(bit_test_cluster::hoist_edge_and_branch_if_true): Annotate
cond with location.
(bit_test_cluster::emit): Annotate all generated expressions
with location.
(cherry picked from commit bc86a86a4f2c057bc0e0be94dcbb8c128ae7f717)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug debug/105070] [9 Regression] Missing debug info for switch statement
2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
` (4 preceding siblings ...)
2022-04-21 12:51 ` [Bug debug/105070] [9/10 " cvs-commit at gcc dot gnu.org
@ 2022-05-06 11:09 ` cvs-commit at gcc dot gnu.org
2022-05-06 11:10 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-06 11:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Richard Biener
<rguenth@gcc.gnu.org>:
https://gcc.gnu.org/g:4be43dbbed4b217201cb395449a7682cd98301ce
commit r9-10045-g4be43dbbed4b217201cb395449a7682cd98301ce
Author: Richard Biener <rguenther@suse.de>
Date: Mon Mar 28 10:07:53 2022 +0200
tree-optimization/105070 - annotate bit cluster tests with locations
The following makes sure to annotate the tests generated by
switch lowering bit-clustering with locations which otherwise
can be completely lost even at -O0.
2022-03-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/105070
* tree-switch-conversion.h
(bit_test_cluster::hoist_edge_and_branch_if_true): Add location
argument.
* tree-switch-conversion.c
(bit_test_cluster::hoist_edge_and_branch_if_true): Annotate
cond with location.
(bit_test_cluster::emit): Annotate all generated expressions
with location.
(cherry picked from commit b285999440c000685c4e4dae9c2a9a8a8fe9e176)
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug debug/105070] [9 Regression] Missing debug info for switch statement
2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
` (5 preceding siblings ...)
2022-05-06 11:09 ` [Bug debug/105070] [9 " cvs-commit at gcc dot gnu.org
@ 2022-05-06 11:10 ` rguenth at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-05-06 11:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105070
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to fail| |9.4.0
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Known to work| |9.4.1
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2022-03-27 16:27 [Bug debug/105070] New: Missing debug info for switch statement liyd2021 at gmail dot com
2022-03-28 7:46 ` [Bug debug/105070] [9/10/11/12 Regression] " rguenth at gcc dot gnu.org
2022-03-28 9:34 ` cvs-commit at gcc dot gnu.org
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