Chandler Carruth fe40a5a3de [PM] Fix a nasty bug in the new PM where we failed to properly ... invalidation of analyses when merging SCCs. While I've added a bunch of testing of this, it takes something much more like the inliner to really trigger this as you need to have partially-analyzed SCCs with updates at just the right time. So I've added a direct test for this using the inliner and verifying the domtree. Without the changes here, this test ends up finding a stale dominator tree. However, to handle this properly, we need to invalidate analyses *before* merging the SCCs. After talking to Philip and Sanjoy about this they convinced me this was the right approach. To do this, we need a callback mechanism when merging SCCs so we can observe the cycle that will be merged before the merge happens. This API update ended up being surprisingly easy. With this commit, the new PM passes the test-suite again. It hadn't since MemorySSA was enabled for EarlyCSE as that also will find this bug very quickly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307498 91177308-0d34-0410-b5e6-96231b3b80d8		2017-07-09 13:45:11 +00:00
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llvm	[PM] Fix a nasty bug in the new PM where we failed to properly	2017-07-09 13:45:11 +00:00
llvm-c	[ORC] Errorize the ORC APIs.	2017-07-07 02:59:13 +00:00