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* [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill
@ 2024-06-12 11:16 schwab@linux-m68k.org
2024-06-12 11:49 ` [Bug target/115458] " rguenth at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: schwab@linux-m68k.org @ 2024-06-12 11:16 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
Bug ID: 115458
Summary: [15 regression] [RISC-V] ICE in
lra_split_hard_reg_for, at lra-assigns.cc:1868 unable
to find a register to spill
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: schwab@linux-m68k.org
Target Milestone: ---
Target: riscv64-*-*
Created attachment 58412
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58412&action=edit
if_test.cc.ii
$ ./xgcc -B. -O2 -std=c++17 -march=rv64gcv1p0 if_test.cc.ii -S -fno-exceptions
/home/abuild/rpmbuild/BUILD/highway-1.2.0/hwy/tests/if_test.cc: In function
‘void hwy::N_RVV::TestIfNegativeThenNegOrUndefIfZero::operator()(T, D) [with T
= short int; D = hwy::N_RVV::Simd<short int, 4096, 3>]’:
/home/abuild/rpmbuild/BUILD/highway-1.2.0/hwy/tests/if_test.cc:268:3: error:
unable to find a register to spill
/home/abuild/rpmbuild/BUILD/highway-1.2.0/hwy/tests/if_test.cc:268:3: error:
this is the insn:
(insn 47 613 689 2 (set (reg:RVVM8HI 284)
(if_then_else:RVVM8HI (unspec:RVVMF2BI [
(reg:RVVMF2BI 285 [orig:152 _19 ] [152])
(reg:DI 134 [ _1 ])
(const_int 2 [0x2])
(const_int 0 [0]) repeated x2
(reg:SI 66 vl)
(reg:SI 67 vtype)
] UNSPEC_VPREDICATE)
(minus:RVVM8HI (reg:RVVM8HI 374 [orig:145 _12 ] [145])
(reg:RVVM8HI 287 [orig:143 _10 ] [143]))
(reg:RVVM8HI 284)))
"/home/abuild/rpmbuild/BUILD/highway-1.2.0/hwy/tests/if_test.cc":251:19 discrim
1 4899 {pred_subrvvm8hi}
(expr_list:REG_DEAD (reg:RVVM8HI 374 [orig:145 _12 ] [145])
(expr_list:REG_DEAD (reg:RVVM8HI 287 [orig:143 _10 ] [143])
(expr_list:REG_DEAD (reg:RVVMF2BI 285 [orig:152 _19 ] [152])
(nil)))))
during RTL pass: reload
/home/abuild/rpmbuild/BUILD/highway-1.2.0/hwy/tests/if_test.cc:268:3: internal
compiler error: in lra_split_hard_reg_for, at lra-assigns.cc:1868
Only happens with -fno-exceptions.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill
2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
@ 2024-06-12 11:49 ` rguenth at gcc dot gnu.org
2024-06-14 7:30 ` pan2.li at intel dot com
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2024-06-12 11:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |15.0
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill
2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
2024-06-12 11:49 ` [Bug target/115458] " rguenth at gcc dot gnu.org
@ 2024-06-14 7:30 ` pan2.li at intel dot com
2024-06-14 8:09 ` pan2.li at intel dot com
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pan2.li at intel dot com @ 2024-06-14 7:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
Li Pan <pan2.li at intel dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pan2.li at intel dot com
--- Comment #1 from Li Pan <pan2.li at intel dot com> ---
Ack, reproduced from today's upstream.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill
2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
2024-06-12 11:49 ` [Bug target/115458] " rguenth at gcc dot gnu.org
2024-06-14 7:30 ` pan2.li at intel dot com
@ 2024-06-14 8:09 ` pan2.li at intel dot com
2024-06-14 13:06 ` pan2.li at intel dot com
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pan2.li at intel dot com @ 2024-06-14 8:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
--- Comment #2 from Li Pan <pan2.li at intel dot com> ---
3700bd68d1b01f0fe6d15f8a40b7fdca0904d5aa round May 15 is OK, let me run a
bisect for the first bad commit.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill
2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
` (2 preceding siblings ...)
2024-06-14 8:09 ` pan2.li at intel dot com
@ 2024-06-14 13:06 ` pan2.li at intel dot com
2024-06-14 17:40 ` [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill since r15-518-g99b1daae18c095 sjames at gcc dot gnu.org
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: pan2.li at intel dot com @ 2024-06-14 13:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
--- Comment #3 from Li Pan <pan2.li at intel dot com> ---
Locate the first commit 99b1daae18c095d6c94d32efb77442838e11cbfb.
tree-optimization/114589 - remove profile based sink heuristics
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill since r15-518-g99b1daae18c095
2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
` (3 preceding siblings ...)
2024-06-14 13:06 ` pan2.li at intel dot com
@ 2024-06-14 17:40 ` sjames at gcc dot gnu.org
2024-06-17 5:50 ` rguenth at gcc dot gnu.org
2024-06-18 14:38 ` pan2.li at intel dot com
6 siblings, 0 replies; 8+ messages in thread
From: sjames at gcc dot gnu.org @ 2024-06-14 17:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
Sam James <sjames at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
Last reconfirmed| |2024-06-14
Summary|[15 regression] [RISC-V] |[15 regression] [RISC-V]
|ICE in |ICE in
|lra_split_hard_reg_for, at |lra_split_hard_reg_for, at
|lra-assigns.cc:1868 unable |lra-assigns.cc:1868 unable
|to find a register to spill |to find a register to spill
| |since
| |r15-518-g99b1daae18c095
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill since r15-518-g99b1daae18c095
2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
` (4 preceding siblings ...)
2024-06-14 17:40 ` [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill since r15-518-g99b1daae18c095 sjames at gcc dot gnu.org
@ 2024-06-17 5:50 ` rguenth at gcc dot gnu.org
2024-06-18 14:38 ` pan2.li at intel dot com
6 siblings, 0 replies; 8+ messages in thread
From: rguenth at gcc dot gnu.org @ 2024-06-17 5:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
The bisected rev only exposes this.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill since r15-518-g99b1daae18c095
2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
` (5 preceding siblings ...)
2024-06-17 5:50 ` rguenth at gcc dot gnu.org
@ 2024-06-18 14:38 ` pan2.li at intel dot com
6 siblings, 0 replies; 8+ messages in thread
From: pan2.li at intel dot com @ 2024-06-18 14:38 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115458
--- Comment #5 from Li Pan <pan2.li at intel dot com> ---
(In reply to Richard Biener from comment #4)
> The bisected rev only exposes this.
Thanks Richard for hint, will take a look into it.
^ permalink raw reply [flat|nested] 8+ messages in thread
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2024-06-12 11:16 [Bug target/115458] New: [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill schwab@linux-m68k.org
2024-06-12 11:49 ` [Bug target/115458] " rguenth at gcc dot gnu.org
2024-06-14 7:30 ` pan2.li at intel dot com
2024-06-14 8:09 ` pan2.li at intel dot com
2024-06-14 13:06 ` pan2.li at intel dot com
2024-06-14 17:40 ` [Bug target/115458] [15 regression] [RISC-V] ICE in lra_split_hard_reg_for, at lra-assigns.cc:1868 unable to find a register to spill since r15-518-g99b1daae18c095 sjames at gcc dot gnu.org
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