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* [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
@ 2004-10-02 2:55 pinskia at gcc dot gnu dot org
2004-10-02 2:55 ` [Bug rtl-optimization/17791] " pinskia at gcc dot gnu dot org
` (9 more replies)
0 siblings, 10 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-02 2:55 UTC (permalink / raw)
To: gcc-bugs
After fixing PR 17790, I noticed that Ada still does not bootstrap and looked into it and noticed that
doloop is causing wrong code:
The RTL looks like:
(insn 334 333 429 27 /Volumes/UFS_Partition/pinskia/src/devel/new-fold/gcc/gcc/ada/csets.adb:
1151 (set (reg:SI 118 [ ivtmp.7 ])
(const_int 255 [0xff])) 332 {*movsi_internal1} (nil)
(nil))
...
(insn 359 358 360 28 /Volumes/UFS_Partition/pinskia/src/devel/new-fold/gcc/gcc/ada/csets.adb:
1151 (set (reg:SI 278)
(plus:SI (reg:SI 118 [ ivtmp.7 ])
(const_int -1 [0xffffffffffffffff]))) -1 (nil)
(nil))
(insn 360 359 361 28 /Volumes/UFS_Partition/pinskia/src/devel/new-fold/gcc/gcc/ada/csets.adb:
1151 (set (reg:SI 118 [ ivtmp.7 ])
(zero_extend:SI (subreg:QI (reg:SI 278) 3))) -1 (nil)
(nil))
(note 361 360 362 28 ("/Volumes/UFS_Partition/pinskia/src/devel/new-fold/gcc/gcc/ada/
csets.adb") 1150)
(insn 362 361 363 28 /Volumes/UFS_Partition/pinskia/src/devel/new-fold/gcc/gcc/ada/csets.adb:
1150 (set (reg:CC 279)
(compare:CC (reg:SI 118 [ ivtmp.7 ])
(const_int 0 [0x0]))) -1 (nil)
(nil))
--
Summary: [4.0 Regression] doloop can produce wrong code causes
Ada bootstrap failure
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: wrong-code, build
Severity: critical
Priority: P2
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pinskia at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: powerpc-apple-darwin
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
@ 2004-10-02 2:55 ` pinskia at gcc dot gnu dot org
2004-10-02 2:59 ` pinskia at gcc dot gnu dot org
` (8 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-02 2:55 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rakdver at gcc dot gnu dot
| |org
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
2004-10-02 2:55 ` [Bug rtl-optimization/17791] " pinskia at gcc dot gnu dot org
@ 2004-10-02 2:59 ` pinskia at gcc dot gnu dot org
2004-10-02 3:00 ` pinskia at gcc dot gnu dot org
` (7 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-02 2:59 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-02 02:59 -------
I should say that the loop gets turned into a loop which starts at (unsigned)-1 and goes down to 0
which is wrong.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
2004-10-02 2:55 ` [Bug rtl-optimization/17791] " pinskia at gcc dot gnu dot org
2004-10-02 2:59 ` pinskia at gcc dot gnu dot org
@ 2004-10-02 3:00 ` pinskia at gcc dot gnu dot org
2004-10-02 5:09 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-02 3:00 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-02 03:00 -------
s/17790/17787.
--
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |17787
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
` (2 preceding siblings ...)
2004-10-02 3:00 ` pinskia at gcc dot gnu dot org
@ 2004-10-02 5:09 ` pinskia at gcc dot gnu dot org
2004-10-03 17:47 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-02 5:09 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-02 05:09 -------
I was able to past the part which I was failing when I reported this bug on powerpc-apple-darwin with
the patch for PR 17787 and with BOOT_CFLAGS="-O2 -g -fno-branch-count-reg" so I think doloop is
the last bootstrap problem with Ada.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
` (3 preceding siblings ...)
2004-10-02 5:09 ` pinskia at gcc dot gnu dot org
@ 2004-10-03 17:47 ` pinskia at gcc dot gnu dot org
2004-10-03 21:44 ` rakdver at gcc dot gnu dot org
` (4 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-03 17:47 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-03 17:47 -------
I hear that this also happens on powerpc-linux and using -fno-branch-count-reg fixes the problem
there too.
--
What |Removed |Added
----------------------------------------------------------------------------
GCC target triplet|powerpc-apple-darwin |powerpc-*-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
` (4 preceding siblings ...)
2004-10-03 17:47 ` pinskia at gcc dot gnu dot org
@ 2004-10-03 21:44 ` rakdver at gcc dot gnu dot org
2004-10-04 6:56 ` rakdver at gcc dot gnu dot org
` (3 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-10-03 21:44 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-10-03 21:44 -------
Doloop tries to interpret number of iterations that is computed in QImode
in SImode, which causes problems since # of iterations is constant, does not
contain information about its mode and gets missinterpreted.
I am testing the patch.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rakdver at gcc dot gnu dot
|dot org |org
Status|UNCONFIRMED |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
` (5 preceding siblings ...)
2004-10-03 21:44 ` rakdver at gcc dot gnu dot org
@ 2004-10-04 6:56 ` rakdver at gcc dot gnu dot org
2004-10-06 22:13 ` pinskia at gcc dot gnu dot org
` (2 subsequent siblings)
9 siblings, 0 replies; 11+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-10-04 6:56 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-10-04 06:56 -------
Patch:
http://gcc.gnu.org/ml/gcc-patches/2004-10/msg00228.html
--
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
` (6 preceding siblings ...)
2004-10-04 6:56 ` rakdver at gcc dot gnu dot org
@ 2004-10-06 22:13 ` pinskia at gcc dot gnu dot org
2004-10-07 6:20 ` cvs-commit at gcc dot gnu dot org
2004-10-07 6:21 ` rakdver at gcc dot gnu dot org
9 siblings, 0 replies; 11+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-06 22:13 UTC (permalink / raw)
To: gcc-bugs
--
Bug 17791 depends on bug 17787, which changed state.
Bug 17787 Summary: [4.0 Regression] Ada does not bootstrap on darwin because of -feliminate-unused-debug-symbols
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17787
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
` (7 preceding siblings ...)
2004-10-06 22:13 ` pinskia at gcc dot gnu dot org
@ 2004-10-07 6:20 ` cvs-commit at gcc dot gnu dot org
2004-10-07 6:21 ` rakdver at gcc dot gnu dot org
9 siblings, 0 replies; 11+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-10-07 6:20 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-10-07 06:20 -------
Subject: Bug 17791
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: rakdver@gcc.gnu.org 2004-10-07 06:20:35
Modified files:
gcc : ChangeLog loop-doloop.c loop-iv.c rtl.h
Log message:
PR rtl-optimization/17791
* loop-doloop.c (doloop_modify): Take number of iterations as
argument.
(doloop_optimize): Extend or shorten the number of iterations
when changing mode of counter register.
* loop-iv.c (lowpart_subreg): Export.
* rtl.h (lowpart_subreg): Declare.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.5778&r2=2.5779
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-doloop.c.diff?cvsroot=gcc&r1=2.9&r2=2.10
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/loop-iv.c.diff?cvsroot=gcc&r1=2.20&r2=2.21
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/rtl.h.diff?cvsroot=gcc&r1=1.512&r2=1.513
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
* [Bug rtl-optimization/17791] [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure
2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
` (8 preceding siblings ...)
2004-10-07 6:20 ` cvs-commit at gcc dot gnu dot org
@ 2004-10-07 6:21 ` rakdver at gcc dot gnu dot org
9 siblings, 0 replies; 11+ messages in thread
From: rakdver at gcc dot gnu dot org @ 2004-10-07 6:21 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rakdver at gcc dot gnu dot org 2004-10-07 06:21 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17791
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2004-10-07 6:21 UTC | newest]
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2004-10-02 2:55 [Bug rtl-optimization/17791] New: [4.0 Regression] doloop can produce wrong code causes Ada bootstrap failure pinskia at gcc dot gnu dot org
2004-10-02 2:55 ` [Bug rtl-optimization/17791] " pinskia at gcc dot gnu dot org
2004-10-02 2:59 ` pinskia at gcc dot gnu dot org
2004-10-02 3:00 ` pinskia at gcc dot gnu dot org
2004-10-02 5:09 ` pinskia at gcc dot gnu dot org
2004-10-03 17:47 ` pinskia at gcc dot gnu dot org
2004-10-03 21:44 ` rakdver at gcc dot gnu dot org
2004-10-04 6:56 ` rakdver at gcc dot gnu dot org
2004-10-06 22:13 ` pinskia at gcc dot gnu dot org
2004-10-07 6:20 ` cvs-commit at gcc dot gnu dot org
2004-10-07 6:21 ` rakdver at gcc dot gnu dot org
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