Regressions on trunk at revision 234386 vs revision 234373

[H.J. Lu ia32 -fpic]

New failures:
FAIL: gcc.dg/ipa/ipa-icf-28.c scan-ipa-dump icf "different decl attributes"

New passes:
FAIL: g++.dg/cilk-plus/CK/fib-opr-overload.cc  -g -fcilkplus execution test
FAIL: g++.dg/ext/label13a.C  -std=gnu++11  scan-assembler _ZN1CC4Ev
FAIL: g++.dg/ext/label13a.C  -std=gnu++11 execution test
FAIL: g++.dg/ext/label13a.C  -std=gnu++14  scan-assembler _ZN1CC4Ev
FAIL: g++.dg/ext/label13a.C  -std=gnu++14 execution test
FAIL: g++.dg/ext/label13a.C  -std=gnu++98  scan-assembler _ZN1CC4Ev
FAIL: g++.dg/ext/label13a.C  -std=gnu++98 execution test