[Bug tree-optimization/64211] New: ICE compiling Linux Kernel net/core/dev.c in dev_change_net_namespace

[Bug tree-optimization/64211] New: ICE compiling Linux Kernel net/core/dev.c in dev_change_net_namespace

[sasha.levin at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64211

            Bug ID: 64211
           Summary: ICE compiling Linux Kernel net/core/dev.c in
                    dev_change_net_namespace
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sasha.levin at oracle dot com
                CC: marxin at gcc dot gnu.org

Created attachment 34211
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34211&action=edit
Preprocessed source

I'm seeing the following ICE:

$ gcc -v -Wp,-MD,net/core/.dev.o.d  -nostdinc -isystem
/home/sasha/gcc-inst/lib/gcc/x86_64-unknown-linux-gnu/5.0.0/include
-I./arch/x86/include -Iarch/x86/include/generated  -Iinclude
-I./arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I./include/uapi
-Iinclude/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -Wall
-Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common
-Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -m64
-mno-80387 -mno-fp-ret-in-387 -march=native -mno-red-zone -mcmodel=kernel
-funit-at-a-time -maccumulate-outgoing-args -DCONFIG_X86_X32_ABI
-DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1
-DCONFIG_AS_FXSAVEQ=1 -DCONFIG_AS_CRC32=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1
-pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx
-mno-sse2 -mno-3dnow -mno-avx -fno-delete-null-pointer-checks -O2
--param=allow-store-data-races=0 -Wframe-larger-than=2048 -fstack-protector
-Wno-unused-but-set-variable -fno-omit-frame-pointer
-fno-optimize-sibling-calls -fno-var-tracking-assignments -g -gdwarf-4
-Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow
-fconserve-stack -Werror=implicit-int -Werror=strict-prototypes
-Werror=date-time -DCC_HAVE_ASM_GOTO    -D"KBUILD_STR(s)=#s"
-D"KBUILD_BASENAME=KBUILD_STR(dev)"  -D"KBUILD_MODNAME=KBUILD_STR(dev)" -c -o
net/core/.tmp_dev.o net/core/dev.c

Using built-in specs.
COLLECT_GCC=gcc
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --prefix=/home/sasha/gcc-inst/ --with-arch=native
--with-tune=native --enable-languages=c --enable-lto --enable-gold
--enable-stage1-languages=c
Thread model: posix
gcc version 5.0.0 20141207 (experimental) (GCC) 

COLLECT_GCC_OPTIONS='-v' '-nostdinc' '-isystem'
'/home/sasha/gcc-inst/lib/gcc/x86_64-unknown-linux-gnu/5.0.0/include' '-I'
'./arch/x86/include' '-I' 'arch/x86/include/generated' '-I' 'include' '-I'
'./arch/x86/include/uapi' '-I' 'arch/x86/include/generated/uapi' '-I'
'./include/uapi' '-I' 'include/generated/uapi' '-include'
'./include/linux/kconfig.h' '-D' '__KERNEL__' '-Wall' '-Wundef'
'-Wstrict-prototypes' '-Wno-trigraphs' '-fno-strict-aliasing' '-fno-common'
'-Werror=implicit-function-declaration' '-Wno-format-security' '-std=gnu90'
'-m64' '-mno-80387' '-mno-fp-ret-in-387' '-march=native' '-mno-red-zone'
'-mcmodel=kernel' '-funit-at-a-time' '-maccumulate-outgoing-args' '-D'
'CONFIG_X86_X32_ABI' '-D' 'CONFIG_AS_CFI=1' '-D' 'CONFIG_AS_CFI_SIGNAL_FRAME=1'
'-D' 'CONFIG_AS_CFI_SECTIONS=1' '-D' 'CONFIG_AS_FXSAVEQ=1' '-D'
'CONFIG_AS_CRC32=1' '-D' 'CONFIG_AS_AVX=1' '-D' 'CONFIG_AS_AVX2=1' '-pipe'
'-Wno-sign-compare' '-fno-asynchronous-unwind-tables' '-mno-sse' '-mno-mmx'
'-mno-sse2' '-mno-3dnow' '-mno-avx' '-fno-delete-null-pointer-checks' '-O2'
'--param' 'allow-store-data-races=0' '-Wframe-larger-than=2048'
'-fstack-protector' '-Wno-unused-but-set-variable' '-fno-omit-frame-pointer'
'-fno-optimize-sibling-calls' '-fno-var-tracking-assignments' '-g' '-gdwarf-4'
'-Wdeclaration-after-statement' '-Wno-pointer-sign' '-fno-strict-overflow'
'-fconserve-stack' '-Werror=implicit-int' '-Werror=strict-prototypes'
'-Werror=date-time' '-D' 'CC_HAVE_ASM_GOTO' '-D' 'KBUILD_STR(s)=#s' '-D'
'KBUILD_BASENAME=KBUILD_STR(dev)' '-D' 'KBUILD_MODNAME=KBUILD_STR(dev)' '-c'
'-o' 'net/core/.tmp_dev.o'
 /home/sasha/gcc-inst/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/cc1 -quiet
-nostdinc -v -I ./arch/x86/include -I arch/x86/include/generated -I include -I
./arch/x86/include/uapi -I arch/x86/include/generated/uapi -I ./include/uapi -I
include/generated/uapi -imultiarch x86_64-linux-gnu -D __KERNEL__ -D
CONFIG_X86_X32_ABI -D CONFIG_AS_CFI=1 -D CONFIG_AS_CFI_SIGNAL_FRAME=1 -D
CONFIG_AS_CFI_SECTIONS=1 -D CONFIG_AS_FXSAVEQ=1 -D CONFIG_AS_CRC32=1 -D
CONFIG_AS_AVX=1 -D CONFIG_AS_AVX2=1 -D CC_HAVE_ASM_GOTO -D KBUILD_STR(s)=#s -D
KBUILD_BASENAME=KBUILD_STR(dev) -D KBUILD_MODNAME=KBUILD_STR(dev) -isystem
/home/sasha/gcc-inst/lib/gcc/x86_64-unknown-linux-gnu/5.0.0/include -include
./include/linux/kconfig.h -MD net/core/.dev.o.d net/core/dev.c -march=nehalem
-mmmx -mno-3dnow -msse -msse2 -msse3 -mssse3 -mno-sse4a -mcx16 -msahf
-mno-movbe -mno-aes -mno-sha -mno-pclmul -mpopcnt -mno-abm -mno-lwp -mno-fma
-mno-fma4 -mno-xop -mno-bmi -mno-bmi2 -mno-tbm -mno-avx -mno-avx2 -msse4.2
-msse4.1 -mno-lzcnt -mno-rtm -mno-hle -mno-rdrnd -mno-f16c -mno-fsgsbase
-mno-rdseed -mno-prfchw -mno-adx -mfxsr -mno-xsave -mno-xsaveopt -mno-avx512f
-mno-avx512er -mno-avx512cd -mno-avx512pf -mno-prefetchwt1 -mno-clflushopt
-mno-xsavec -mno-xsaves -mno-avx512dq -mno-avx512bw -mno-avx512vl
-mno-avx512ifma -mno-avx512vbmi -mno-clwb -mno-pcommit --param l1-cache-size=32
--param l1-cache-line-size=64 --param l2-cache-size=24576 -mtune=nehalem -quiet
-dumpbase dev.c -m64 -mno-80387 -mno-fp-ret-in-387 -mno-red-zone
-mcmodel=kernel -maccumulate-outgoing-args -mno-sse -mno-mmx -mno-sse2
-mno-3dnow -mno-avx -auxbase-strip net/core/.tmp_dev.o -g -gdwarf-4 -O2 -Wall
-Wundef -Wstrict-prototypes -Wno-trigraphs
-Werror=implicit-function-declaration -Wno-format-security -Wno-sign-compare
-Wframe-larger-than=2048 -Wno-unused-but-set-variable
-Wdeclaration-after-statement -Wno-pointer-sign -Werror=implicit-int
-Werror=strict-prototypes -Werror=date-time -std=gnu90 -version
-fno-strict-aliasing -fno-common -funit-at-a-time
-fno-asynchronous-unwind-tables -fno-delete-null-pointer-checks
-fstack-protector -fno-omit-frame-pointer -fno-optimize-sibling-calls
-fno-var-tracking-assignments -fno-strict-overflow -fconserve-stack --param
allow-store-data-races=0 -o - |
 as -v -I ./arch/x86/include -I arch/x86/include/generated -I include -I
./arch/x86/include/uapi -I arch/x86/include/generated/uapi -I ./include/uapi -I
include/generated/uapi --64 -o net/core/.tmp_dev.o
GNU assembler version 2.24 (x86_64-linux-gnu) using BFD version (GNU Binutils
for Debian) 2.24
GNU C89 (GCC) version 5.0.0 20141207 (experimental) (x86_64-unknown-linux-gnu)
    compiled by GNU C version 5.0.0 20141207 (experimental), GMP version 5.0.5,
MPFR version 3.1.0-p10, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
#include "..." search starts here:
#include <...> search starts here:
 ./arch/x86/include
 arch/x86/include/generated
 include
 ./arch/x86/include/uapi
 arch/x86/include/generated/uapi
 ./include/uapi
 include/generated/uapi
 /home/sasha/gcc-inst/lib/gcc/x86_64-unknown-linux-gnu/5.0.0/include
End of search list.
GNU C89 (GCC) version 5.0.0 20141207 (experimental) (x86_64-unknown-linux-gnu)
    compiled by GNU C version 5.0.0 20141207 (experimental), GMP version 5.0.5,
MPFR version 3.1.0-p10, MPC version 0.9
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: fa5217cad7784451a293893e0584355b
net/core/dev.c: In function ‘dev_change_net_namespace.part.107’:
net/core/dev.c:7404:1: internal compiler error: in verify_ssa, at
tree-ssa.c:939
 subsys_initcall(net_dev_init);
 ^
0xcbf2a2 verify_ssa(bool, bool)
    ../../gcc/tree-ssa.c:939
0xa19a65 execute_function_todo
    ../../gcc/passes.c:1947
0xa1a1bd do_per_function
    ../../gcc/passes.c:1639
0xa1a2d3 execute_todo
    ../../gcc/passes.c:1997
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.


I've bisected it down to:

commit 52200d03c231f0bddbd4bbc5cd3608c6a1dd4598
Author: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Oct 16 10:47:55 2014 +0000

    IPA ICF pass, part 3/5

        * Makefile.in: New object files included.
        * cgraph.c (cgraph_node::dump): New cgraph_node flag icf_merged
        is printed.
        (verify_edge_corresponds_to_fndecl): More sensitive verification
        of nodes that are merged by IPA ICF.
        * cgraph.h (cgraph_node::num_references): New function.
        * cgraphunit.c (cgraph_node::expand_thunk): White space fixed.
        * common.opt: New options ipa-icf, ipa-icf-functions and
        ipa-icf-variables introduced.
        * doc/invoke.texi: Documentation of new options introduced.
        * ipa-icf-gimple.c: New file.
        * ipa-icf-gimple.h: New file.
        * ipa-icf.c: New file.
        * ipa-icf.h: New file.
        * lto-cgraph.c (lto_output_node): Streaming of icf_merged flag added.
        (input_overwrite_node): Likewise.
        * lto-section-in.c: New icf section added.
        * lto-streamer.h (enum lto_section_type): Likewise.
        * opts.c (common_handle_option): New option added.
        * passes.def: New pass included.
        * timevar.def: Time variable for IPA ICF added.
        * tree-pass.h: New IPA ICF pass entry point added.



    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@216305
138bc75d-0d04-0410-961f-82ee72b054a4


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Subject: [Bug ipa/63569] [5.0 Regression] Wrong code with volatile and ICF
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc569

--- Comment #9 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
*** Bug 64211 has been marked as a duplicate of this bug. ***

[Bug tree-optimization/64211] ICE compiling Linux Kernel net/core/dev.c in dev_change_net_namespace

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64211

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |trippels at gcc dot gnu.org
         Resolution|---                         |DUPLICATE

--- Comment #1 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Dup.

*** This bug has been marked as a duplicate of bug 63569 ***