Regressions on trunk at revision 236845 vs revision 236810

[H.J. Lu Intel64 -fpic -mcmodel=medium -mcmodel=large]

New failures:
FAIL: 25_algorithms/is_sorted/1.cc execution test
FAIL: 25_algorithms/is_sorted/1.cc execution test
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/20050826-2.c   -Os  execution test
FAIL: gcc.c-torture/execute/20050826-2.c   -Os  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O2  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/930628-1.c   -Os  execution test

New passes: