Regressions on trunk at revision 189840 vs revision 189839

[H.J. Lu Intel64]

New failures:
FAIL: boehm-gc.c/gctest.c -O2 execution test
FAIL: g++.dg/opt/pr46640.C -std=gnu++11 (internal compiler error)
FAIL: g++.dg/opt/pr46640.C -std=gnu++11 (test for excess errors)
FAIL: gcc.target/i386/pr45352-1.c (internal compiler error)
FAIL: gcc.target/i386/pr45352-1.c (test for excess errors)
FAIL: gfortran.dg/pr44691.f  -O  (internal compiler error)
FAIL: gfortran.dg/pr44691.f  -O  (test for excess errors)

New passes:
FAIL: g++.dg/opt/pr44919.C -std=gnu++11 (internal compiler error)
FAIL: g++.dg/opt/pr44919.C -std=gnu++11 (test for excess errors)
FAIL: g++.dg/opt/pr44919.C -std=gnu++98 (internal compiler error)
FAIL: g++.dg/opt/pr44919.C -std=gnu++98 (test for excess errors)