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* [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse
@ 2011-06-10 2:54 hp at gcc dot gnu.org
2011-06-10 2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: hp at gcc dot gnu.org @ 2011-06-10 2:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357
Summary: [4.7 Regression] register allocation worse
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: hp@gcc.gnu.org
Host: x86_64-unknown-linux-gnu
Target: cris-axis-elf
Compare the prologue for the test-case in attachment 24471 to PR49154 and
compiled according to those instructions,
<http://gcc.gnu.org/bugzilla/attachment.cgi?id=24471> between 4.3.3 (everything
before the first "add"):
subq 4,$sp
move $srp,[$sp]
subq 12,$sp
movem $r2,[$sp]
move.d $r10,$r2
move.d $r10,$r9
move.d $r11,$r10
to that of trunk at r174114 as well as r174870:
subq 4,$sp
move $srp,[$sp]
subq 16,$sp
movem $r3,[$sp]
subq 4,$sp
move.d $r8,[$sp]
move.d $r10,$r8
move.d $r11,$r9
So, we have a regression from 3 to 5 registers, and with a hole compared to
reg_alloc_order. Note that the source uses DFmode and DImode and derived
unions; at a glance "normal" code is less affected. Building on a 32-bit host
seems to aggravate the situation.
Just put here as a note for the time being.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug rtl-optimization/49357] [4.7 Regression] register allocation worse 2011-06-10 2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org @ 2011-06-10 2:54 ` hp at gcc dot gnu.org 2011-06-10 9:35 ` rguenth at gcc dot gnu.org 2011-10-10 11:53 ` [Bug rtl-optimization/49357] " rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: hp at gcc dot gnu.org @ 2011-06-10 2:54 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357 Hans-Peter Nilsson <hp at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |SUSPENDED Last reconfirmed| |2011.06.10 02:54:33 Ever Confirmed|0 |1 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/49357] [4.7 Regression] register allocation worse 2011-06-10 2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org 2011-06-10 2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org @ 2011-06-10 9:35 ` rguenth at gcc dot gnu.org 2011-10-10 11:53 ` [Bug rtl-optimization/49357] " rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2011-06-10 9:35 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357 Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |4.7.0 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/49357] register allocation worse 2011-06-10 2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org 2011-06-10 2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org 2011-06-10 9:35 ` rguenth at gcc dot gnu.org @ 2011-10-10 11:53 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2011-10-10 11:53 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49357 Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |ra Known to work| |4.3.3 Target Milestone|4.7.0 |--- Summary|[4.7 Regression] register |register allocation worse |allocation worse | Known to fail| |4.7.0 --- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-10 11:51:30 UTC --- Removing regression markers for suspended bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2011-10-10 11:53 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-06-10 2:54 [Bug rtl-optimization/49357] New: [4.7 Regression] register allocation worse hp at gcc dot gnu.org 2011-06-10 2:54 ` [Bug rtl-optimization/49357] " hp at gcc dot gnu.org 2011-06-10 9:35 ` rguenth at gcc dot gnu.org 2011-10-10 11:53 ` [Bug rtl-optimization/49357] " rguenth at gcc dot gnu.org
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