4 Commits

Author	SHA1	Message	Date
Juneyoung Lee	06829034ca	Revert "[ConstantFold] Fold more operations to poison" ... This reverts commit 53040a968d due to its bad interaction with select i1 -> and/or i1 transformation. This fixes: https://bugs.llvm.org/show_bug.cgi?id=49005 https://bugs.llvm.org/show_bug.cgi?id=48435	2021-02-04 00:24:02 +09:00
Juneyoung Lee	53040a968d	[ConstantFold] Fold more operations to poison ... This patch folds more operations to poison. Alive2 proof: https://alive2.llvm.org/ce/z/mxcb9G (it does not contain tests about div/rem because they fold to poison when raising UB) Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D92270	2020-11-29 21:19:48 +09:00
Juneyoung Lee	c6b62efb91	[ConstantFold] Fold operations to poison if possible ... This patch updates ConstantFold, so operations are folded into poison if possible. <alive2 proofs> casts: https://alive2.llvm.org/ce/z/WSj7rw binary operations (arithmetic): https://alive2.llvm.org/ce/z/_7dEyJ binary operations (bitwise): https://alive2.llvm.org/ce/z/cezjVN vector/aggregate operations: https://alive2.llvm.org/ce/z/BQ7hWz unary ops: https://alive2.llvm.org/ce/z/yBRs4q other ops: https://alive2.llvm.org/ce/z/iXbcFD Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D92203	2020-11-29 02:28:40 +09:00
Arthur Eubanks	486ed88533	[ConstProp] Remove ConstantPropagation ... As discussed in http://lists.llvm.org/pipermail/llvm-dev/2020-July/143801.html. Currently no users outside of unit tests. Replace all instances in tests of -constprop with -instsimplify. Notable changes in tests: * vscale.ll - @llvm.sadd.sat.nxv16i8 is evaluated by instsimplify, use a fake intrinsic instead * InsertElement.ll - insertelement undef is removed by instsimplify in @insertelement_undef llvm/test/Transforms/ConstProp moved to llvm/test/Transforms/InstSimplify/ConstProp Reviewed By: lattner, nikic Differential Revision: https://reviews.llvm.org/D85159	2020-08-26 15:51:30 -07:00