Regressions on trunk at revision 221329 vs revision 221318

[Intel Automatic Testing System [ia32 Core AVXi]]

New failures:
FAIL: gcc.dg/ipa/pr63569.c scan-ipa-dump icf "different operand volatility"
FAIL: gcc.dg/ipa/PR64550.c scan-ipa-dump icf "different operand volatility"
FAIL: gfortran.dg/class_allocate_18.f90   -O0  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O1  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O2  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -fomit-frame-pointer  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -fomit-frame-pointer -funroll-loops  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -O3 -g  execution test
FAIL: gfortran.dg/class_allocate_18.f90   -Os  execution test

New passes: