Regressions on trunk at revision 177610 vs revision 177588

[H.J. Lu ia32]

New failures:

New passes:
FAIL: PR3096 -O3 -findirect-dispatch execution - source compiled test
FAIL: PR3096 -O3 execution - source compiled test
FAIL: PR3096 -findirect-dispatch execution - source compiled test
FAIL: PR3096 execution - source compiled test
FAIL: c-c++-common/dfp/inf-1.c execution test
FAIL: c-c++-common/dfp/inf-1.c execution test
FAIL: c-c++-common/dfp/operator-assignment.c execution test
FAIL: c-c++-common/dfp/operator-assignment.c execution test
FAIL: c-c++-common/dfp/usual-arith-conv.c execution test
FAIL: c-c++-common/dfp/usual-arith-conv.c execution test
FAIL: gcc.dg/pr43419.c execution test
FAIL: md5test -O3 -findirect-dispatch execution - source compiled test
FAIL: md5test -O3 execution - source compiled test
FAIL: md5test -findirect-dispatch execution - source compiled test
FAIL: md5test execution - source compiled test
FAIL: pr21785 -O3 -findirect-dispatch execution - source compiled test
FAIL: pr21785 -O3 execution - source compiled test
FAIL: pr21785 -findirect-dispatch execution - source compiled test
FAIL: pr21785 execution - source compiled test
FAIL: shatest -O3 -findirect-dispatch execution - source compiled test
FAIL: shatest -O3 execution - source compiled test
FAIL: shatest -findirect-dispatch execution - source compiled test
FAIL: shatest execution - source compiled test