Regressions on trunk at revision 227844 vs revision 227819

[H.J. Lu Intel64 Core i7]

New failures:
FAIL: experimental/filesystem/operations/canonical.cc execution test
FAIL: experimental/filesystem/operations/canonical.cc execution test

New passes:
FAIL: gcc.target/i386/pr49781-1.c scan-assembler-not lea[lq]?[ \t]\\((%|)r[a-z0-9]*