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* [Bug target/94542] New: test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2
@ 2020-04-09 17:09 acsawdey at gcc dot gnu.org
2020-04-09 17:13 ` [Bug target/94542] " acsawdey at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: acsawdey at gcc dot gnu.org @ 2020-04-09 17:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94542
Bug ID: 94542
Summary: test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates
incorrect code on ppc64le with -mpcrel -mcpu=future
-O2
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: acsawdey at gcc dot gnu.org
Target Milestone: ---
The test case is:
__thread double thrtest[81];
int main ()
{
double *p, *e;
e = &thrtest[81];
for (p = &thrtest[0]; p < e; ++p)
*p = 1.0;
return 0;
}
Generated code for p and e is
paddi 9,13,thrtest@tprel
pla 8,thrtest+648@pcrel
The second should also be using a @tprel relocation. Because it didn't, the
loop runs off the end of allocated memory and segfaults. This test runs
correctly when compiled with -O0.
Compile command:
/home2/sawdey/work/gcc/mamboCI/build-mambo/gcc/xgcc
-B/home2/sawdey/work/gcc/mamboCI/build-mambo/gcc/
/home2/sawdey/work/gcc/mamboCI/pike-trunk/gcc/testsuite/gcc.dg/tls/pr24428-2.c
-O2 -mpcrel -mcpu=future -S -o pr24428-2.exe.s
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/94542] test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2
2020-04-09 17:09 [Bug target/94542] New: test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2 acsawdey at gcc dot gnu.org
@ 2020-04-09 17:13 ` acsawdey at gcc dot gnu.org
2020-04-14 19:41 ` cvs-commit at gcc dot gnu.org
2021-05-04 12:32 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: acsawdey at gcc dot gnu.org @ 2020-04-09 17:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94542
acsawdey at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|unassigned at gcc dot gnu.org |acsawdey at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Last reconfirmed| |2020-04-09
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/94542] test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2
2020-04-09 17:09 [Bug target/94542] New: test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2 acsawdey at gcc dot gnu.org
2020-04-09 17:13 ` [Bug target/94542] " acsawdey at gcc dot gnu.org
@ 2020-04-14 19:41 ` cvs-commit at gcc dot gnu.org
2021-05-04 12:32 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-04-14 19:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94542
--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Aaron Sawdey <acsawdey@gcc.gnu.org>:
https://gcc.gnu.org/g:aba6453890ce1754b7d1c01a67612766690ff15e
commit r10-7722-gaba6453890ce1754b7d1c01a67612766690ff15e
Author: Aaron Sawdey <acsawdey@linux.ibm.com>
Date: Tue Apr 14 14:38:47 2020 -0500
Fix for PR/94542, do not make TLS refs PC-relative
For rs6000 target, it is not valid to make PC-relative
references to TLS symbols. So addr_to_insn_form() needs
to check if things are TLS before returning PC-rel forms.
2020-04-14 Aaron Sawdey <acsawdey@linux.ibm.com>
PR target/94542
* config/rs6000/rs6000.c (address_to_insn_form): Do not attempt to
use PC-relative addressing for TLS references.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/94542] test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2
2020-04-09 17:09 [Bug target/94542] New: test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2 acsawdey at gcc dot gnu.org
2020-04-09 17:13 ` [Bug target/94542] " acsawdey at gcc dot gnu.org
2020-04-14 19:41 ` cvs-commit at gcc dot gnu.org
@ 2021-05-04 12:32 ` rguenth at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-05-04 12:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94542
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-05-04 12:32 UTC | newest]
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2020-04-09 17:09 [Bug target/94542] New: test gcc/testsuite/gcc.dg/tls/pr24428-2.c generates incorrect code on ppc64le with -mpcrel -mcpu=future -O2 acsawdey at gcc dot gnu.org
2020-04-09 17:13 ` [Bug target/94542] " acsawdey at gcc dot gnu.org
2020-04-14 19:41 ` cvs-commit at gcc dot gnu.org
2021-05-04 12:32 ` rguenth at gcc dot gnu.org
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