Regressions on native/master at commit r15-6426 vs commit r15-6423 on Linux/x86_64

[Haochen Jiang]

Regressions on master at commit r15-6426 vs commit r15-6423 on Linux/x86_64
New failures:

New passes:
FAIL: gfortran.dg/coarray_lib_comm_1.f90   -O0   scan-tree-dump-times original "_gfortran_caf_get_by_ct \\(caf_token.., 0B, 0B, 1, \\(unsigned long\\) atmp.[0-9]+.span" 4
FAIL: gfortran.dg/coarray_lib_comm_1.f90   -O1   scan-tree-dump-times original "_gfortran_caf_get_by_ct \\(caf_token.., 0B, 0B, 1, \\(unsigned long\\) atmp.[0-9]+.span" 4
FAIL: gfortran.dg/coarray_lib_comm_1.f90   -O2   scan-tree-dump-times original "_gfortran_caf_get_by_ct \\(caf_token.., 0B, 0B, 1, \\(unsigned long\\) atmp.[0-9]+.span" 4
FAIL: gfortran.dg/coarray_lib_comm_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions   scan-tree-dump-times original "_gfortran_caf_get_by_ct \\(caf_token.., 0B, 0B, 1, \\(unsigned long\\) atmp.[0-9]+.span" 4
FAIL: gfortran.dg/coarray_lib_comm_1.f90   -O3 -g   scan-tree-dump-times original "_gfortran_caf_get_by_ct \\(caf_token.., 0B, 0B, 1, \\(unsigned long\\) atmp.[0-9]+.span" 4
FAIL: gfortran.dg/coarray_lib_comm_1.f90   -Os   scan-tree-dump-times original "_gfortran_caf_get_by_ct \\(caf_token.., 0B, 0B, 1, \\(unsigned long\\) atmp.[0-9]+.span" 4