[Bug target/51134] [4.7 Regression] x86 memset/memcpy expansion is broken

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51134

--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> 2011-11-22 03:30:54 UTC ---
On Linux/x86-64, configured with

--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --enable-shared
--prefix=/usr/gcc-4.7.0 --with-local-prefix=/usr/local -with-arch=core2
--with-cpu=atom --with-fpmath=sse

revision 181584 result is at

http://gcc.gnu.org/ml/gcc-testresults/2011-11/msg02226.html

revision 181584 + the old memset/memcpy expansion result us at

http://gcc.gnu.org/ml/gcc-testresults/2011-11/msg02225.html

Regressions caused by the new memset/memcpy expansion are

FAIL: 27_io/basic_filebuf/seekoff/wchar_t/1.cc execution test
FAIL: 27_io/basic_filebuf/seekpos/wchar_t/9874.cc execution test
FAIL: 27_io/manipulators/basefield/char/1.cc execution test
FAIL: 27_io/manipulators/basefield/wchar_t/1.cc execution test
FAIL: 27_io/objects/wchar_t/12.cc execution test
FAIL: 27_io/objects/wchar_t/13.cc execution test
FAIL: events run
FAIL: gcc.target/i386/cleanup-1.c execution test
FAIL: gcc.target/i386/cleanup-2.c execution test
FAIL: gcc.target/i386/pr34077.c (internal compiler error)
FAIL: gcc.target/i386/pr34077.c (internal compiler error)
FAIL: gcc.target/i386/pr34077.c (test for excess errors)
FAIL: gcc.target/i386/pr34077.c (test for excess errors)
FAIL: gfortran.fortran-torture/execute/arrayarg.f90 execution,  -O2
-fomit-frame-pointer -finline-functions -funroll-loops