https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109140
Bug ID: 109140
Summary: ICE when building qemu (qemu-user, MIPS component) on
sparc64-unknown-linux-gnu with -march=niagara4
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: sam at gentoo dot org
Target Milestone: ---
Host: sparc64-unknown-linux-gnu
Target: sparc64-unknown-linux-gnu
Build: sparc64-unknown-linux-gnu
Hit when building QEMU 7.2.0's qemu-user component for mips on sparc64. This
one is reproducible with cross.
It needs -O2 -mcpu=niagara4 at least and -O2 -march=ultrasparc is fine.
```
$ sparc64-unknown-linux-gnu-gcc target_mips_tcg_lmmi_helper.c.i -O2
-mcpu=niagara4 -c
../target/mips/tcg/lmmi_helper.c: In function ‘helper_pcmpgtb’:
../target/mips/tcg/lmmi_helper.c:554:1: error: unrecognizable insn:
(insn 9 8 10 2 (set (reg:DI 118)
(unspec:DI [
(ltu:V8QI (subreg:V8QI (reg/v:DI 115 [ ft ]) 0)
(subreg:V8QI (reg/v:DI 114 [ fs ]) 0))
] UNSPEC_FUCMP)) "../target/mips/tcg/lmmi_helper.c":551:18 -1
(nil))
during RTL pass: vregs
../target/mips/tcg/lmmi_helper.c:554:1: internal compiler error: in
extract_insn, at recog.cc:2791
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://bugs.gentoo.org/> for instructions.
$ sparc64-unknown-linux-gnu-gcc --version
sparc64-unknown-linux-gnu-gcc (Gentoo Hardened 12.2.1_p20230304 p13) 12.2.1
20230304
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
```
Attached the preprocessed source, not yet reduced or bisected, but I'll be
doing both later.
