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* [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly
@ 2003-07-02 19:08 dmk at rscheme dot org
2003-07-02 19:10 ` [Bug c/11413] " dmk at rscheme dot org
` (11 more replies)
0 siblings, 12 replies; 13+ messages in thread
From: dmk at rscheme dot org @ 2003-07-02 19:08 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
Summary: -ffixed registers on powerpc optimized incorrectly
Product: gcc
Version: 3.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dmk at rscheme dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: powerpc-ibm-aix5.1.0.0
GCC host triplet: powerpc-ibm-aix5.1.0.0
GCC target triplet: powerpc-ibm-aix5.1.0.0
GCC 3.3 on RS6000/PowerPC is incorrectly optimizing registers declared -ffixed,
which RScheme uses for virtual machine registers. In particular, the compiler
does not recognize that a call an external procedure may clobber a register
which was declared -ffixed. I've reduced it to a small example which exhibits
the problem. With -O0, the problem is not exhibited.
This affects the default RScheme 0.7.3.3 build (ftp://ftp.rscheme.org/priv/b/rs-
0.7.3.3-b8.tar.gz)
I will attach the source and preprocessor output. I included the portion
of the assembly output (below) that I believe is in error (see the ### comment)
----------------------------[gcc invocation]-----------------
bash-2.04$ gcc -v -save-temps -ffixed-18 -ffixed-19 -O2 test.c
Reading specs from /usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3/specs
Configured with: /tmp/gcc-3.3/configure
Thread model: aix
gcc version 3.3
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3/cc1 -E -quiet -v -
D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=0 test.c -ffixed-18 -
ffixed-19 -O2 test.i
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/powerpc-ibm-aix5.1.0.0/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3/include
/usr/include
End of search list.
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3/cc1 -fpreprocessed test.i -
quiet -dumpbase test.c -auxbase test -O2 -version -ffixed-18 -ffixed-19 -o
test.s
GNU C version 3.3 (powerpc-ibm-aix5.1.0.0)
compiled by GNU C version 3.3.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
as -u -mcom -o test.o test.s
/usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3/collect2 -bpT:0x10000000 -
bpD:0x20000000 -btextro -bnodelcsect /lib/crt0.o -L/usr/local/lib/gcc-
lib/powerpc-ibm-aix5.1.0.0/3.3 -L/usr/local/lib/gcc-lib/powerpc-ibm-
aix5.1.0.0/3.3/../../.. test.o /usr/local/lib/gcc-lib/powerpc-ibm-
aix5.1.0.0/3.3/libgcc.a /usr/local/lib/gcc-lib/powerpc-ibm-
aix5.1.0.0/3.3/libgcc_eh.a -lc /usr/local/lib/gcc-lib/powerpc-ibm-
aix5.1.0.0/3.3/libgcc.a /usr/local/lib/gcc-lib/powerpc-ibm-
aix5.1.0.0/3.3/libgcc_eh.a
------------------------------------------------------
.foo:
.extern __mulh
.extern __mull
.extern __divss
.extern __divus
.extern __quoss
.extern __quous
mflr 0
mr 19,18
stw 0,8(1)
stwu 1,-56(1)
bl .quux # (this call clobbers reg 18)
nop
li 3,0
andi. 0,18,3 ############# <--- this should reference register 19!
bne- 0,L..3
L..1:
addi 1,1,56
lwz 0,8(1)
mtlr 0
blr
L..3:
bl .blech
nop
b L..1
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c/11413] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
@ 2003-07-02 19:10 ` dmk at rscheme dot org
2003-07-02 19:11 ` dmk at rscheme dot org
` (10 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: dmk at rscheme dot org @ 2003-07-02 19:10 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
------- Additional Comments From dmk at rscheme dot org 2003-07-02 19:10 -------
Created an attachment (id=4329)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4329&action=view)
Standalone test case (C source code)
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c/11413] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
2003-07-02 19:10 ` [Bug c/11413] " dmk at rscheme dot org
@ 2003-07-02 19:11 ` dmk at rscheme dot org
2003-07-02 19:56 ` geoffk at geoffk dot org
` (9 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: dmk at rscheme dot org @ 2003-07-02 19:11 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
------- Additional Comments From dmk at rscheme dot org 2003-07-02 19:11 -------
Created an attachment (id=4330)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=4330&action=view)
Preprocessed output of test case
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug c/11413] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
2003-07-02 19:10 ` [Bug c/11413] " dmk at rscheme dot org
2003-07-02 19:11 ` dmk at rscheme dot org
@ 2003-07-02 19:56 ` geoffk at geoffk dot org
2003-07-20 13:16 ` [Bug target/11413] " pinskia at physics dot uc dot edu
` (8 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: geoffk at geoffk dot org @ 2003-07-02 19:56 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
------- Additional Comments From geoffk at geoffk dot org 2003-07-02 19:56 -------
Subject: Re: New: -ffixed registers on powerpc optimized incorrectly
This is probably due to something using call_used_regs instead of
regs_invalidated_by_call.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (2 preceding siblings ...)
2003-07-02 19:56 ` geoffk at geoffk dot org
@ 2003-07-20 13:16 ` pinskia at physics dot uc dot edu
2003-07-20 14:31 ` pinskia at physics dot uc dot edu
` (7 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-20 13:16 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|c |target
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (3 preceding siblings ...)
2003-07-20 13:16 ` [Bug target/11413] " pinskia at physics dot uc dot edu
@ 2003-07-20 14:31 ` pinskia at physics dot uc dot edu
2003-08-20 4:16 ` pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at physics dot uc dot edu @ 2003-07-20 14:31 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
pinskia at physics dot uc dot edu changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
GCC target triplet|powerpc-ibm-aix5.1.0.0 |powerpc-*-*
Last reconfirmed|0000-00-00 00:00:00 |2003-07-20 14:31:47
date| |
------- Additional Comments From pinskia at physics dot uc dot edu 2003-07-20 14:31 -------
I can confirm this on the mainline (20030720) on powerpc-apple-darwin6.6.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (4 preceding siblings ...)
2003-07-20 14:31 ` pinskia at physics dot uc dot edu
@ 2003-08-20 4:16 ` pinskia at gcc dot gnu dot org
2003-08-23 0:39 ` dhazeghi at yahoo dot com
` (5 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2003-08-20 4:16 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
------- Additional Comments From pinskia at gcc dot gnu dot org 2003-08-20 04:16 -------
I think this is related to bug 10684 and bug 7871.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (5 preceding siblings ...)
2003-08-20 4:16 ` pinskia at gcc dot gnu dot org
@ 2003-08-23 0:39 ` dhazeghi at yahoo dot com
2003-08-29 18:06 ` [Bug target/11413] [3.3/3.4 regression] " bangerth at dealii dot org
` (4 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: dhazeghi at yahoo dot com @ 2003-08-23 0:39 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
dhazeghi at yahoo dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
GCC build triplet|powerpc-ibm-aix5.1.0.0 |
GCC host triplet|powerpc-ibm-aix5.1.0.0 |
Target Milestone|3.4 |---
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] [3.3/3.4 regression] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (6 preceding siblings ...)
2003-08-23 0:39 ` dhazeghi at yahoo dot com
@ 2003-08-29 18:06 ` bangerth at dealii dot org
2003-09-27 16:41 ` cvs-commit at gcc dot gnu dot org
` (3 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: bangerth at dealii dot org @ 2003-08-29 18:06 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
bangerth at dealii dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|-ffixed registers on powerpc|[3.3/3.4 regression] -ffixed
|optimized incorrectly |registers on powerpc
| |optimized incorrectly
Target Milestone|--- |3.4
------- Additional Comments From bangerth at dealii dot org 2003-08-29 18:06 -------
This has incorrectly not been marked as a regression, see
http://gcc.gnu.org/ml/gcc/2003-08/msg01744.html
Done hereby.
W.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] [3.3/3.4 regression] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (7 preceding siblings ...)
2003-08-29 18:06 ` [Bug target/11413] [3.3/3.4 regression] " bangerth at dealii dot org
@ 2003-09-27 16:41 ` cvs-commit at gcc dot gnu dot org
2003-09-27 17:37 ` lerdsuwa at gcc dot gnu dot org
` (2 subsequent siblings)
11 siblings, 0 replies; 13+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2003-09-27 16:41 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2003-09-27 16:34 -------
Subject: Bug 11413
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: lerdsuwa@gcc.gnu.org 2003-09-27 16:34:29
Modified files:
gcc/cp : ChangeLog parser.c
Log message:
PR c++/11413
* parser.c (cp_parser_nested_name_specifier_opt): Issue correct
error message when parser->scope is global_namespace.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3704&r2=1.3705
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&r1=1.112&r2=1.113
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] [3.3/3.4 regression] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (8 preceding siblings ...)
2003-09-27 16:41 ` cvs-commit at gcc dot gnu dot org
@ 2003-09-27 17:37 ` lerdsuwa at gcc dot gnu dot org
2004-01-10 7:03 ` pinskia at gcc dot gnu dot org
2004-01-12 21:02 ` geoffk at gcc dot gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: lerdsuwa at gcc dot gnu dot org @ 2003-09-27 17:37 UTC (permalink / raw)
To: gcc-bugs
PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
------- Additional Comments From lerdsuwa at gcc dot gnu dot org 2003-09-27 16:41 -------
Oops. The patch above is actually for PR11415.
The ChangeLog is corrected now.
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] [3.3/3.4 regression] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (9 preceding siblings ...)
2003-09-27 17:37 ` lerdsuwa at gcc dot gnu dot org
@ 2004-01-10 7:03 ` pinskia at gcc dot gnu dot org
2004-01-12 21:02 ` geoffk at gcc dot gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-01-10 7:03 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-01-10 07:03 -------
Nobody really uses global registers that much (or should I say they should not be).
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |minor
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
^ permalink raw reply [flat|nested] 13+ messages in thread
* [Bug target/11413] [3.3/3.4 regression] -ffixed registers on powerpc optimized incorrectly
2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
` (10 preceding siblings ...)
2004-01-10 7:03 ` pinskia at gcc dot gnu dot org
@ 2004-01-12 21:02 ` geoffk at gcc dot gnu dot org
11 siblings, 0 replies; 13+ messages in thread
From: geoffk at gcc dot gnu dot org @ 2004-01-12 21:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From geoffk at gcc dot gnu dot org 2004-01-12 21:02 -------
-ffixed registers are, by definition, not call-clobbered. You should not use -ffixed with a register
that you use for a global register variable.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11413
^ permalink raw reply [flat|nested] 13+ messages in thread
end of thread, other threads:[~2004-01-12 21:02 UTC | newest]
Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
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2003-07-02 19:08 [Bug c/11413] New: -ffixed registers on powerpc optimized incorrectly dmk at rscheme dot org
2003-07-02 19:10 ` [Bug c/11413] " dmk at rscheme dot org
2003-07-02 19:11 ` dmk at rscheme dot org
2003-07-02 19:56 ` geoffk at geoffk dot org
2003-07-20 13:16 ` [Bug target/11413] " pinskia at physics dot uc dot edu
2003-07-20 14:31 ` pinskia at physics dot uc dot edu
2003-08-20 4:16 ` pinskia at gcc dot gnu dot org
2003-08-23 0:39 ` dhazeghi at yahoo dot com
2003-08-29 18:06 ` [Bug target/11413] [3.3/3.4 regression] " bangerth at dealii dot org
2003-09-27 16:41 ` cvs-commit at gcc dot gnu dot org
2003-09-27 17:37 ` lerdsuwa at gcc dot gnu dot org
2004-01-10 7:03 ` pinskia at gcc dot gnu dot org
2004-01-12 21:02 ` geoffk at gcc dot gnu dot org
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