------- Comment #69 from baldrick at free dot fr 2009-11-17 11:04 ------- It seems that variables produced by the Ada front-end no longer have any non-trivial range information associated with them. Without knowing the range information type S is range 0 .. 100; type T is range 10 .. 20; it is impossible for the optimizers to eliminate most of the range checks in this testcase. With the range information all of the checks can in theory be removed. This is an example of how range information is potentially very helpful for optimizing Ada programs.
Is there anyway for the optimizers to get at this range information still? Or was range information removed because it is essentially impossible to use it correctly (if so this bug report should be closed as unfixable)? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30911
