http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56866
Bug #: 56866
Summary: gcc 4.7.x/gcc-4.8.x with '-O3 -march=bdver2'
misscompiles glibc-2.17/crypt/sha512.c
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: winfried.mag...@t-online.de
compiling glibc-2.17 with 'O3 -march=bdver2' fails crypt-test when running
'make check' after glibc-build. I've already tested with different
compilers/settings and the problem exists with gcc-4.7.x and gcc-4.8.x when
using '-O3 -march=bdver1' or '-O3 -march=bdver2' (-O2 is fine) and the affected
file is glibc-2.17/crypt/sha512.c.
I've attached a tar-file which includes necessary files from glibc-2.17
(sha512-block.c/sha512.c/sha512.h) and a modified version of sha512c-test.c
(removed dependency to glibc-test-environment). Might not work if system-libc
is not 2.17
(recompiling glibc and run test-suite should always work.
A small test-script test-gcc.sh to demonstrate the problem. Verified on:
gcc (GCC) 4.8.1 20130407 / glibc-2.17
gcc (GCC) 4.7.2 20130108 / opensuse-12.3 / glibc-2.17
