I just tried to compile a recent Linux kernel with a recent
GNU C++ compiler version 4.2 snapshot 20060218.
The compiler snapshot said
/home/dcb/gnu/42-20060218/results/bin/gcc -g -O3 -Wall
-Wp,-MD,security/keys/.keyring.o.d -nostdinc -isystem
/home/dcb/gnu/42-20060218/results/lib/gcc/x86_64-unknown-linux-gnu/4.2.0/include
-D__KERNEL__ -Iinclude -include include/linux/autoconf.h -Wall -Wundef
-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-ffreestanding -Os -fno-omit-frame-pointer -fno-optimize-sibling-calls -g
-march=k8 -mno-red-zone -mcmodel=kernel -pipe -fno-reorder-blocks
-Wno-sign-compare -funit-at-a-time -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
-Wdeclaration-after-statement -Wno-pointer-sign -DKBUILD_BASENAME=keyring
-DKBUILD_MODNAME=keyring -c -o security/keys/.tmp_keyring.o
security/keys/keyring.c
In file included from include/asm/smp.h:22,
from include/linux/smp.h:19,
from include/linux/sched.h:26,
from include/linux/module.h:10,
from security/keys/keyring.c:12:
include/asm/apic.h: In function 'apic_write_atomic':
include/asm/apic.h:47: warning: value computed is not used
security/keys/keyring.c: In function 'keyring_clear_rcu_disposal':
security/keys/keyring.c:970: internal compiler error: in set_value_range, at
tree-vrp.c:150
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
Preprocessed source code attached. -Os flag required.
--
Summary: ice on valid C code with flag -Os
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dcb314 at hotmail dot com
GCC host triplet: x86+64-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26425
