3 Commits

Author	SHA1	Message	Date
Michael Kuperstein	e4bd47a0d4	[ConstantFolding] Fix vector GEPs harder ... For vector GEPs, CastGEPIndices can end up in an infinite recursion, because we compare the vector type to the scalar pointer type, find them different, and then try to cast a type to itself. Differential Revision: https://reviews.llvm.org/D28009 llvm-svn: 290260	2016-12-21 17:34:21 +00:00
Keno Fischer	ab41662e58	ConstantFolding: Don't crash when encountering vector GEP ... ConstantFolding tried to cast one of the scalar indices to a vector type. Instead, use the vector type only for the first index (which is the only one allowed to be a vector) and use its scalar type otherwise. Fixes PR31250. Reviewers: majnemer Differential Revision: https://reviews.llvm.org/D27389 llvm-svn: 289073	2016-12-08 17:22:35 +00:00
Peter Collingbourne	fbb7ea5270	IR: Introduce inrange attribute on getelementptr indices. ... If the inrange keyword is present before any index, loading from or storing to any pointer derived from the getelementptr has undefined behavior if the load or store would access memory outside of the bounds of the element selected by the index marked as inrange. This can be used, e.g. for alias analysis or to split globals at element boundaries where beneficial. As previously proposed on llvm-dev: http://lists.llvm.org/pipermail/llvm-dev/2016-July/102472.html Differential Revision: https://reviews.llvm.org/D22793 llvm-svn: 286514	2016-11-10 22:34:55 +00:00