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* [Bug target/63824] New: [5.0 Regression]: ICE with -mcmodel=large -fpic and pseudo PIC
@ 2014-11-11 18:17 ubizjak at gmail dot com
2014-11-11 18:20 ` [Bug target/63824] " ubizjak at gmail dot com
2014-11-11 18:35 ` ubizjak at gmail dot com
0 siblings, 2 replies; 3+ messages in thread
From: ubizjak at gmail dot com @ 2014-11-11 18:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63824
Bug ID: 63824
Summary: [5.0 Regression]: ICE with -mcmodel=large -fpic and
pseudo PIC
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
This ICE can be seen in [1] as FAIL: g++.dg/other/pr53811.C on Darwin, but can
be triggered also on x86_64 linux with -mcmodel=large -fpic
The problem starts in x86_output_mi_thunk, where we have:
if (ix86_cmodel == CM_LARGE_PIC && SYMBOLIC_CONST (fnaddr))
fnaddr = legitimize_pic_address (fnaddr,
gen_rtx_REG (Pmode, tmp_regno));
and legitimize_pic_address does:
13537 if (reg != 0)
13538 {
13539 new_rtx = expand_simple_binop (Pmode, PLUS, reg,
pic_offset_table_rtx,
13540 tmpreg, 1, OPTAB_DIRECT);
13541 new_rtx = reg;
13542 }
Please note that x86_output_mi_thunk runs after reload, and the above code
emits RTX with a pseudo pic_offset_table_rtx register.
[1] https://gcc.gnu.org/ml/gcc-testresults/2014-11/msg01024.html
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/63824] [5.0 Regression]: ICE with -mcmodel=large -fpic and pseudo PIC
2014-11-11 18:17 [Bug target/63824] New: [5.0 Regression]: ICE with -mcmodel=large -fpic and pseudo PIC ubizjak at gmail dot com
@ 2014-11-11 18:20 ` ubizjak at gmail dot com
2014-11-11 18:35 ` ubizjak at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: ubizjak at gmail dot com @ 2014-11-11 18:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63824
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64
CC| |enkovich.gnu at gmail dot com
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Adding CC.
>From gcc-bugs-return-466419-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 11 18:32:52 2014
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From: "dominiq at lps dot ens.fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/63824] [5.0 Regression]: ICE with -mcmodel=large -fpic and pseudo PIC
Date: Tue, 11 Nov 2014 18:32:00 -0000
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--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Duplicate of pr63815?
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug target/63824] [5.0 Regression]: ICE with -mcmodel=large -fpic and pseudo PIC
2014-11-11 18:17 [Bug target/63824] New: [5.0 Regression]: ICE with -mcmodel=large -fpic and pseudo PIC ubizjak at gmail dot com
2014-11-11 18:20 ` [Bug target/63824] " ubizjak at gmail dot com
@ 2014-11-11 18:35 ` ubizjak at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: ubizjak at gmail dot com @ 2014-11-11 18:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63824
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Dominique d'Humieres from comment #2)
> Duplicate of pr63815?
Yes. Let's go there.
*** This bug has been marked as a duplicate of bug 63815 ***
>From gcc-bugs-return-466421-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 11 18:36:00 2014
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/63815] g++.dg/other/pr53811.C fails on darwin14
Date: Tue, 11 Nov 2014 18:36:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
*** Bug 63824 has been marked as a duplicate of this bug. ***
>From gcc-bugs-return-466422-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 11 18:37:16 2014
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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/63815] g++.dg/other/pr53811.C fails on darwin14
Date: Tue, 11 Nov 2014 18:37:00 -0000
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Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|x86_64-apple-darwin14 |x86_64
CC| |enkovich.gnu at gmail dot com
Host|x86_64-apple-darwin14 |
Build|x86_64-apple-darwin14 |
--- Comment #5 from Uroš Bizjak <ubizjak at gmail dot com> ---
This ICE can be seen in [1] as FAIL: g++.dg/other/pr53811.C on Darwin, but can
be triggered also on x86_64 linux with -mcmodel=large -fpic
The problem starts in x86_output_mi_thunk, where we have:
if (ix86_cmodel == CM_LARGE_PIC && SYMBOLIC_CONST (fnaddr))
fnaddr = legitimize_pic_address (fnaddr,
gen_rtx_REG (Pmode, tmp_regno));
and legitimize_pic_address does:
13537 if (reg != 0)
13538 {
13539 new_rtx = expand_simple_binop (Pmode, PLUS, reg,
pic_offset_table_rtx,
13540 tmpreg, 1, OPTAB_DIRECT);
13541 new_rtx = reg;
13542 }
Please note that x86_output_mi_thunk runs after reload, and the above code
emits RTX with a pseudo pic_offset_table_rtx register.
[1] https://gcc.gnu.org/ml/gcc-testresults/2014-11/msg01024.html
>From gcc-bugs-return-466423-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Nov 11 18:48:50 2014
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From: "sje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/63823] [5.0 Regression] MIPS will not build due to LRA ICE with 64 bit ABI
Date: Tue, 11 Nov 2014 18:48:00 -0000
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--- Comment #4 from Steve Ellcey <sje at gcc dot gnu.org> ---
I have now verified that the failure started with r217265.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-11-11 18:17 [Bug target/63824] New: [5.0 Regression]: ICE with -mcmodel=large -fpic and pseudo PIC ubizjak at gmail dot com
2014-11-11 18:20 ` [Bug target/63824] " ubizjak at gmail dot com
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