Regressions on native/master at commit r15-5902 vs commit r15-5896 on Linux/x86_64

[Haochen Jiang]

Regressions on master at commit r15-5902 vs commit r15-5896 on Linux/x86_64
New failures:
FAIL: gfortran.dg/class_transformational_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (internal compiler error: in make_ssa_name_fn, at tree-ssanames.cc:355)
FAIL: gfortran.dg/class_transformational_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  (test for excess errors)
FAIL: gfortran.dg/class_transformational_1.f90   -O3 -g  (internal compiler error: in make_ssa_name_fn, at tree-ssanames.cc:355)
FAIL: gfortran.dg/class_transformational_1.f90   -O3 -g  (test for excess errors)
FAIL: gfortran.dg/class_transformational_2.f90   -Os  execution test

New passes: