* [Bug target/63762] [ARM]GCC generates UNPREDICTABLE STR with Rn = Rt when hard-float abi is used
[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
@ 2014-11-06 14:20 ` renlin.li at arm dot com
2014-11-10 9:14 ` ramana at gcc dot gnu.org
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From: renlin.li at arm dot com @ 2014-11-06 14:20 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
--- Comment #1 from Renlin Li <renlin.li at arm dot com> ---
I am starting to work on this issue.
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug target/63762] [ARM]GCC generates UNPREDICTABLE STR with Rn = Rt when hard-float abi is used
[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
2014-11-06 14:20 ` [Bug target/63762] [ARM]GCC generates UNPREDICTABLE STR with Rn = Rt when hard-float abi is used renlin.li at arm dot com
@ 2014-11-10 9:14 ` ramana at gcc dot gnu.org
2014-11-13 15:12 ` renlin.li at arm dot com
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From: ramana at gcc dot gnu.org @ 2014-11-10 9:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
Ramana Radhakrishnan <ramana at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2014-11-10
CC| |ramana at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |renlin.li at arm dot com
Target Milestone|--- |5.0
Ever confirmed|0 |1
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[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
2014-11-06 14:20 ` [Bug target/63762] [ARM]GCC generates UNPREDICTABLE STR with Rn = Rt when hard-float abi is used renlin.li at arm dot com
2014-11-10 9:14 ` ramana at gcc dot gnu.org
@ 2014-11-13 15:12 ` renlin.li at arm dot com
2014-11-13 15:17 ` renlin.li at arm dot com
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From: renlin.li at arm dot com @ 2014-11-13 15:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
--- Comment #2 from Renlin Li <renlin.li at arm dot com> ---
r278 is derived from r224 which is a VFP_LO_REGS.
find_cost_and_classes assigns r278's class as GENERAL_REGS, and assign it
hard_reg 2. Another new pseudo register r290 is created from r278, and assigned
to the same hard_register and register class (GENERAL_REGS).
The pref_class of r290 is derived from its original reg (r224), which is
VFP_LO_REGS
In lra during the hard register assignment process, conflict is checked for
r302 which is a GENERAL_REGS. r290 is not considered, because of different
register classes(reg_pref[290].pref_class == VFP_LO_REGS ). Hard register
number 2 is chosen in this case.
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[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2014-11-13 15:12 ` renlin.li at arm dot com
@ 2014-11-13 15:17 ` renlin.li at arm dot com
2014-11-13 16:12 ` ramana at gcc dot gnu.org
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From: renlin.li at arm dot com @ 2014-11-13 15:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
--- Comment #3 from Renlin Li <renlin.li at arm dot com> ---
Created attachment 33957
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33957&action=edit
ira dump
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[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2014-11-13 15:17 ` renlin.li at arm dot com
@ 2014-11-13 16:12 ` ramana at gcc dot gnu.org
2014-11-19 15:16 ` [Bug middle-end/63762] " renlin at gcc dot gnu.org
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From: ramana at gcc dot gnu.org @ 2014-11-13 16:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
--- Comment #4 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Renlin Li from comment #2)
> r278 is derived from r224 which is a VFP_LO_REGS.
>
> find_cost_and_classes assigns r278's class as GENERAL_REGS, and assign it
> hard_reg 2. Another new pseudo register r290 is created from r278, and
> assigned to the same hard_register and register class (GENERAL_REGS).
>
> The pref_class of r290 is derived from its original reg (r224), which is
> VFP_LO_REGS
>
> In lra during the hard register assignment process, conflict is checked for
> r302 which is a GENERAL_REGS. r290 is not considered, because of different
> register classes(reg_pref[290].pref_class == VFP_LO_REGS ). Hard register
> number 2 is chosen in this case.
R2 should not be in VFP_LO_REGS - how does IRA end up choosing that ?
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[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2014-11-13 16:12 ` ramana at gcc dot gnu.org
@ 2014-11-19 15:16 ` renlin at gcc dot gnu.org
2014-11-19 15:28 ` renlin.li at arm dot com
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From: renlin at gcc dot gnu.org @ 2014-11-19 15:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
--- Comment #5 from renlin at gcc dot gnu.org ---
Author: renlin
Date: Wed Nov 19 15:15:51 2014
New Revision: 217783
URL: https://gcc.gnu.org/viewcvs?rev=217783&root=gcc&view=rev
Log:
2014-11-19 Renlin Li <Renlin.Li@arm.com>
PR middle-end/63762
* ira.c (ira): Update preferred class.
* gcc.dg/pr63762.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr63762.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ira.c
trunk/gcc/testsuite/ChangeLog
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[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2014-11-19 15:16 ` [Bug middle-end/63762] " renlin at gcc dot gnu.org
@ 2014-11-19 15:28 ` renlin.li at arm dot com
2014-11-21 18:13 ` rearnsha at gcc dot gnu.org
2014-12-03 11:14 ` renlin at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: renlin.li at arm dot com @ 2014-11-19 15:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
Renlin Li <renlin.li at arm dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Renlin Li <renlin.li at arm dot com> ---
fix r217783
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[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
` (6 preceding siblings ...)
2014-11-19 15:28 ` renlin.li at arm dot com
@ 2014-11-21 18:13 ` rearnsha at gcc dot gnu.org
2014-12-03 11:14 ` renlin at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: rearnsha at gcc dot gnu.org @ 2014-11-21 18:13 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |doko at gcc dot gnu.org
--- Comment #7 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
*** Bug 63749 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 9+ messages in thread* [Bug middle-end/63762] [ARM]GCC generates UNPREDICTABLE STR with Rn = Rt when hard-float abi is used
[not found] <bug-63762-4@http.gcc.gnu.org/bugzilla/>
` (7 preceding siblings ...)
2014-11-21 18:13 ` rearnsha at gcc dot gnu.org
@ 2014-12-03 11:14 ` renlin at gcc dot gnu.org
8 siblings, 0 replies; 9+ messages in thread
From: renlin at gcc dot gnu.org @ 2014-12-03 11:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63762
--- Comment #8 from renlin at gcc dot gnu.org ---
Author: renlin
Date: Wed Dec 3 11:13:50 2014
New Revision: 218306
URL: https://gcc.gnu.org/viewcvs?rev=218306&root=gcc&view=rev
Log:
Backported from mainline
gcc/
2014-12-03 Renlin Li <Renlin.Li@arm.com>
PR middle-end/63762
PR target/63661
* ira.c (i386ra): Update preferred class.
gcc/testsuite/
2014-12-03 Renlin Li <Renlin.Li@arm.com>
H.J. Lu <hongjiu.lu@intel.com>
PR middle-end/63762
PR target/63661
* gcc.dg/pr63762.c: New test.
* gcc.target/i386/pr63661.c: New test.
Added:
branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63762.c
branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr63661.c
Modified:
branches/gcc-4_9-branch/gcc/ChangeLog
branches/gcc-4_9-branch/gcc/ira.c
branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 9+ messages in thread