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* [Bug rtl-optimization/78664] LRA must honor REG_ALLOC_ORDER to pick reload registers
[not found] <bug-78664-4@http.gcc.gnu.org/bugzilla/>
@ 2024-03-30 9:19 ` ebotcazou at gcc dot gnu.org
2024-05-17 15:49 ` vmakarov at gcc dot gnu.org
2024-05-17 17:05 ` ebotcazou at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2024-03-30 9:19 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78664
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |WONTFIX
--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug rtl-optimization/78664] LRA must honor REG_ALLOC_ORDER to pick reload registers
[not found] <bug-78664-4@http.gcc.gnu.org/bugzilla/>
2024-03-30 9:19 ` [Bug rtl-optimization/78664] LRA must honor REG_ALLOC_ORDER to pick reload registers ebotcazou at gcc dot gnu.org
@ 2024-05-17 15:49 ` vmakarov at gcc dot gnu.org
2024-05-17 17:05 ` ebotcazou at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: vmakarov at gcc dot gnu.org @ 2024-05-17 15:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78664
--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
During register assignment subpass LRA processes hard regs from
ira_class_hard_regs. Under the same conditions (e.g. costs), LRA chooses regs
processed first.
ira_class_hard_regs contains regs according REG_ALLOC_ORDER.
LRA has code for balanced use of hard regs (controlled by hook
register_usage_leveling_p). But now by default it is switched off. Probably
the issue occurred when the code was switched on.
To be sure I tried the test case and I was not able to reproduce the problem.
So I think the problem has been solved.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug rtl-optimization/78664] LRA must honor REG_ALLOC_ORDER to pick reload registers
[not found] <bug-78664-4@http.gcc.gnu.org/bugzilla/>
2024-03-30 9:19 ` [Bug rtl-optimization/78664] LRA must honor REG_ALLOC_ORDER to pick reload registers ebotcazou at gcc dot gnu.org
2024-05-17 15:49 ` vmakarov at gcc dot gnu.org
@ 2024-05-17 17:05 ` ebotcazou at gcc dot gnu.org
2 siblings, 0 replies; 3+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2024-05-17 17:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78664
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
OK, thanks for the explanation.
^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <bug-78664-4@http.gcc.gnu.org/bugzilla/>
2024-03-30 9:19 ` [Bug rtl-optimization/78664] LRA must honor REG_ALLOC_ORDER to pick reload registers ebotcazou at gcc dot gnu.org
2024-05-17 15:49 ` vmakarov at gcc dot gnu.org
2024-05-17 17:05 ` ebotcazou at gcc dot gnu.org
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