https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65665
Bug ID: 65665
Summary: [5.0 Regression]: g++.dg/torture/pr64378.C -O2 -flto
-fno-use-linker-plugin -flto-partition=none
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code, lto
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: hp at gcc dot gnu.org
CC: marxin at gcc dot gnu.org
Host: x86_64-linux-gnu
Target: cris-elf
This test passed before, but since a revision in the range (221794:221800],
this test fails as follows:
Running /tmp/hpautotest-gcc1/gcc/gcc/testsuite/g++.dg/torture/dg-torture.exp
...
FAIL: g++.dg/torture/pr64378.C -O2 -flto -fno-use-linker-plugin
-flto-partition=none (internal compiler error)
FAIL: g++.dg/torture/pr64378.C -O2 -flto -fno-use-linker-plugin
-flto-partition=none (test for excess errors)
In g++.log (cutnpasted):
Executing on host:
/tmp/hpautotest-gcc1/cris-elf/gccobj/gcc/testsuite/g++/../../xg++
-B/tmp/hpautotest-gcc1/cris-elf/gcc
obj/gcc/testsuite/g++/../../
/tmp/hpautotest-gcc1/gcc/gcc/testsuite/g++.dg/torture/pr64378.C
-fno-diagnostics-show-care
t -fdiagnostics-color=never -nostdinc++
-I/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libstdc++-v3/include/cris-elf -
I/tmp/hpautotest-gcc1/cris-elf/gccobj/cris-elf/libstdc++-v3/include
-I/tmp/hpautotest-gcc1/gcc/libstdc++-v3/libsupc++ -I
/tmp/hpautotest-gcc1/gcc/libstdc++-v3/include/backward
-I/tmp/hpautotest-gcc1/gcc/libstdc++-v3/testsuite/util -fmessage-
length=0 -O2 -flto -fno-use-linker-plugin -flto-partition=none -fno-ipa-cp
-S -isystem /tmp/hpautotest-gcc1/cris-e
lf/gccobj/cris-elf/./newlib/targ-include -isystem
/tmp/hpautotest-gcc1/gcc/newlib/libc/include -o pr64378.s (timeou
t = 300)
/tmp/hpautotest-gcc1/gcc/gcc/testsuite/g++.dg/torture/pr64378.C:24:1: internal
compiler error: Segmentation fault
0xbbbd85 crash_signal
/tmp/hpautotest-gcc1/gcc/gcc/toplev.c:383
0xf76aee vec<ipa_param_descriptor, va_heap, vl_embed>::operator[](unsigned int)
/tmp/hpautotest-gcc1/gcc/gcc/vec.h:736
0xf76aee vec<ipa_param_descriptor, va_heap, vl_ptr>::operator[](unsigned int)
/tmp/hpautotest-gcc1/gcc/gcc/vec.h:1202
0xf76aee ipa_is_param_used
/tmp/hpautotest-gcc1/gcc/gcc/ipa-prop.h:405
0xf76aee ipa_icf::sem_item_optimizer::update_hash_by_addr_refs()
/tmp/hpautotest-gcc1/gcc/gcc/ipa-icf.c:2504
0xf76dd5 ipa_icf::sem_item_optimizer::execute()
/tmp/hpautotest-gcc1/gcc/gcc/ipa-icf.c:2394
0xf77f7e ipa_icf_driver
/tmp/hpautotest-gcc1/gcc/gcc/ipa-icf.c:3304
0xf77f7e ipa_icf::pass_ipa_icf::execute(function*)
/tmp/hpautotest-gcc1/gcc/gcc/ipa-icf.c:3351
Please submit a full bug report,
Judging from the actual changes in the revision range and from the backtrace, I
think it's the ipa-icf.c change rather than any of the other changes (e.g. lto
despite the -flto required to trig this), hence the single CC. I'll also bisect
further.
