Regressions on trunk at revision 236845 vs revision 236810

[H.J. Lu x32 -fpic]

New failures:
FAIL: 25_algorithms/is_sorted/1.cc execution test
FAIL: gcc.c-torture/execute/20050826-2.c   -Os  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test

New passes: