Roman Lebedev 78b8ce40ef Reland [SCEV] Improve modelling for (null) pointer constants ... This reverts commit 329aeb5db4, and relands commit 61f006ac65. This is a continuation of D89456. As it was suggested there, now that SCEV models `PtrToInt`, we can try to improve SCEV's pointer handling. In particular, i believe, i will need this in the future to further fix `SCEVAddExpr`operation type handling. This removes special handling of `ConstantPointerNull` from `ScalarEvolution::createSCEV()`, and add constant folding into `ScalarEvolution::getPtrToIntExpr()`. This way, `null` constants stay as such in SCEV's, but gracefully become zero integers when asked. Reviewed By: Meinersbur Differential Revision: https://reviews.llvm.org/D98147		2021-03-13 16:05:34 +03:00
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Ast	[Polly] Update isl to isl-0.23-61-g24e8cd12.	2021-01-19 12:01:31 -06:00
CodeGen	Reland [SCEV] Improve modelling for (null) pointer constants	2021-03-13 16:05:34 +03:00
isl-args.ll	[Polly] Add -polly-isl-arg command line option.	2020-04-06 08:56:57 -05:00
single_loop_param_less_equal.ll	…
single_loop_param_less_than.ll	…
single_loop_uint_max_iterations.ll	…
single_loop_ull_max_iterations.ll	…