tree-ssa-loop-niter.c (double_int_cmp, [...]): New functions.
* tree-ssa-loop-niter.c (double_int_cmp, bound_index, discover_iteration_bound_by_body_walk): New functions. (discover_iteration_bound_by_body_walk): Use it. * gcc.dg/tree-ssa/loop-38.c: New testcase. From-SVN: r193104
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gcc/testsuite/gcc.dg/tree-ssa/loop-38.c
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