Regressions on trunk at revision 174952 vs revision 174911

[H.J. Lu ia32 Core 2/i7]

New failures:
FAIL: g++.dg/lto/20081118-1 cp_lto_20081118-1_0.o-cp_lto_20081118-1_1.o link, -O0 -flto
FAIL: g++.dg/lto/20081118-1 cp_lto_20081118-1_0.o-cp_lto_20081118-1_1.o link, -O0 -flto -flto-partition=1to1 
FAIL: g++.dg/lto/20081118-1 cp_lto_20081118-1_0.o-cp_lto_20081118-1_1.o link, -O0 -flto -flto-partition=none 
FAIL: g++.dg/lto/20081118-1 cp_lto_20081118-1_0.o-cp_lto_20081118-1_1.o link, -O2 -flto
FAIL: g++.dg/lto/20081118-1 cp_lto_20081118-1_0.o-cp_lto_20081118-1_1.o link, -O2 -flto -flto-partition=1to1 
FAIL: g++.dg/lto/20081118-1 cp_lto_20081118-1_0.o-cp_lto_20081118-1_1.o link, -O2 -flto -flto-partition=none 
FAIL: g++.dg/lto/20100302 cp_lto_20100302_0.o-cp_lto_20100302_1.o link, -flto -fabi-version=2
FAIL: g++.dg/torture/pr40389.C  -O2 -flto  execution test
FAIL: g++.dg/torture/pr40389.C  -O2 -flto -flto-partition=none  execution test
FAIL: g++.dg/torture/pr43879-1_1.C  -O1  execution test
FAIL: g++.dg/torture/pr43879-1_1.C  -O2  execution test
FAIL: g++.dg/torture/pr43879-1_1.C  -O3 -fomit-frame-pointer  execution test
FAIL: g++.dg/torture/pr43879-1_1.C  -O3 -g  execution test
FAIL: g++.dg/torture/pr43879-1_1.C  -Os  execution test
FAIL: gcc.c-torture/execute/builtins/strlen-3.c execution,  -O2 -flto 
FAIL: gcc.c-torture/execute/builtins/strlen-3.c execution,  -O2 -flto -flto-partition=none 
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto  line 17 sizeof (a) == 6
FAIL: gcc.dg/guality/vla-1.c  -O2 -flto -flto-partition=none  line 17 sizeof (a) == 6

New passes:
FAIL: gcc.dg/dump-pass.c (test for excess errors)