https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82107
Bug ID: 82107
Summary: O2 optimisation on amd64 leads to error
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: loquens at yandex dot ru
Target Milestone: ---
Created attachment 42129
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42129&action=edit
full error example sources
Complete source code attached.
Steps to reproduce this bug in amd64-environment:
* extract archive contents
* enter directory optfail
* call make
* run ./optimization_fail - program will hang
Please see comments marked "IMPORTANT" in sources and Makefile. All theese
notes change behaviour (error dissapears).
Originally found on GCC-6.3.0 compiled from sources, but 7.0.1 (from Ubuntu
17.04 repos, full version shown below) and 7.2.0 (compiled from sources, same
flags as 6.3.0, shown below) also produce error.
$ lsb_release -a
LSB Version:
core-9.20160110ubuntu5-amd64:core-9.20160110ubuntu5-noarch:security-9.20160110ubuntu5-amd64:security-9.20160110ubuntu5-noarch
Distributor ID: Ubuntu
Description: Ubuntu 17.04
Release: 17.04
Codename: zesty
$ g++ --version
g++ (Ubuntu 7-20170407-0ubuntu2) 7.0.1 20170407 (experimental) [trunk revision
246759]
Copyright (C) 2017 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.
gcc-7.2.0 compilation flags:
./configure --disable-cloog-version-check \
--disable-ppl-version-check --enable-cloog-backend=isl \
--enable-gold --enable-languages=c,c++ --enable-lto --enable-libssp \
--prefix=/install/prefix --with-cloog=/install/prefix \
--with-gmp=/install/prefix --with-mlgmp=/install/prefix \
--with-mpc=/install/prefix --with-mpfr=/install/prefix \
--with-ppl=/install/prefix
With best regards,
loquens
