3 Commits

Author	SHA1	Message	Date
David Bolvansky	92ce94fff3	[SimplifyCFG] Added condition assumption for unreachable blocks ... Summary: PR41688 Reviewers: spatel, efriedma, craig.topper, hfinkel, reames Reviewed By: hfinkel Subscribers: javed.absar, dmgreen, fhahn, hfinkel, reames, nikic, lebedev.ri, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D61409 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@361707 91177308-0d34-0410-b5e6-96231b3b80d8	2019-05-25 22:34:27 +00:00
David Bolvansky	f441bf782f	[NFC] Update test checks ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@361695 91177308-0d34-0410-b5e6-96231b3b80d8	2019-05-25 13:11:22 +00:00
Sanjay Patel	207c75bf19	[ValueTracking] add recursion depth param to matchSelectPattern ... We're getting bug reports: https://bugs.llvm.org/show_bug.cgi?id=35807 https://bugs.llvm.org/show_bug.cgi?id=35840 https://bugs.llvm.org/show_bug.cgi?id=36045 ...where we blow up the stack in value tracking because other passes are sending in selects that have an operand that is itself the select. We don't currently have a reliable way to avoid analyzing dead code that may take non-standard forms, so bail out when things go too far. This mimics the recursion depth limitations in other parts of value tracking. Unfortunately, this pushes the underlying problems for other passes (jump-threading, simplifycfg, correlated-propagation) into hiding. If someone wants to uncover those again, the first draft of this patch on Phab would do that (it would assert rather than bail out). Differential Revision: https://reviews.llvm.org/D42442 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323331 91177308-0d34-0410-b5e6-96231b3b80d8	2018-01-24 15:20:37 +00:00