Regressions on trunk at revision 202188 vs revision 202185

[H.J. Lu ia32]

New failures:

New passes:
FAIL: gcc.dg/lto/20090218-1 c_lto_20090218-1_0.o-c_lto_20090218-1_1.o link, -O0 -flto -flto-partition=1to1 -fno-use-linker-plugin 
FAIL: gcc.dg/lto/20090218-1 c_lto_20090218-1_0.o-c_lto_20090218-1_1.o link, -O0 -flto -flto-partition=none -fuse-linker-plugin
FAIL: gcc.dg/lto/20090218-1 c_lto_20090218-1_0.o-c_lto_20090218-1_1.o link, -O0 -flto -fuse-linker-plugin -fno-fat-lto-objects 
FAIL: gcc.dg/lto/pr56297 c_lto_pr56297_0.o-c_lto_pr56297_1.o link,  -flto -fno-common  (internal compiler error)