[Bug c++/91006] [10 Regression] Several test suite fails on *darwin* after r272618

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91006

--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> ---
Created attachment 46527
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46527&action=edit
ivopts-3.C.164t.ivopts

This only happens for -std=c++98 and -m64:

$ grep "Selected IV set for loop" ivopts-3.C.164t.ivopts 
Selected IV set for loop 2 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:50, 2146689 avg
niters, 1 IVs:
Selected IV set for loop 1 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:49, 9 avg niters,
1 IVs:

for gnu++14 - I see (the first entry matches the scan, I guess):
$ grep "Selected IV set for loop" ivopts-3.C.164t.ivopts 
Selected IV set for loop 9 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:64, 3 avg niters,
1 IVs:
Selected IV set for loop 8 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:63, 127 avg
niters, 4 IVs:
Selected IV set for loop 7 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:61, 3 avg niters,
3 IVs:
Selected IV set for loop 6 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:60, 127 avg
niters, 3 IVs:
Selected IV set for loop 5 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:58, 3 avg niters,
4 IVs:
Selected IV set for loop 4 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:57, 127 avg
niters, 4 IVs:
Selected IV set for loop 3 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:55, 1000 avg
niters, 1 IVs:
Selected IV set for loop 2 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:50, 2146689 avg
niters, 1 IVs:
Selected IV set for loop 1 at
/src-local/gcc-trunk/gcc/testsuite/g++.dg/tree-ssa/ivopts-3.C:49, 9 avg niters,
1 IVs: