5 Commits

Author	SHA1	Message	Date
Chad Rosier	f56813d057	[AliasSetTracker] Make AST smarter about assume intrinsics that don't actually affect memory. ... Differential Revision: https://reviews.llvm.org/D26252 llvm-svn: 286108	2016-11-07 14:11:45 +00:00
Chad Rosier	7c0f8709c5	Revert "[AliasSetTracker] Make AST smarter about intrinsics that don't actually affect memory." ... This reverts commit r285191. LICM appears to rely on the Alias Set Tracker hitting lifetime markers to prevent code from being moved outside of the original scope. llvm-svn: 285227	2016-10-26 19:18:19 +00:00
Chad Rosier	5c8105a75f	[AliasSetTracker] Make AST smarter about intrinsics that don't actually affect memory. ... Differential Revision: https://reviews.llvm.org/D25969 llvm-svn: 285191	2016-10-26 12:42:11 +00:00
Chad Rosier	d8727d0208	[AliasSetTracker] Add support for memcpy and memmove. ... Differential Revision: https://reviews.llvm.org/D25776 llvm-svn: 284630	2016-10-19 19:09:03 +00:00
Michael Kuperstein	2a0f74a4bf	[AliasSetTracker] Degrade AliasSetTracker when may-alias sets get too large. ... Repeated inserts into AliasSetTracker have quadratic behavior - inserting a pointer into AST is linear, since it requires walking over all "may" alias sets and running an alias check vs. every pointer in the set. We can avoid this by tracking the total number of pointers in "may" sets, and when that number exceeds a threshold, declare the tracker "saturated". This lumps all pointers into a single "may" set that aliases every other pointer. (This is a stop-gap solution until we migrate to MemorySSA) This fixes PR28832. Differential Revision: https://reviews.llvm.org/D23432 llvm-svn: 279274	2016-08-19 17:05:22 +00:00