2 Commits

Author	SHA1	Message	Date
Roman Lebedev	aa2009fe78	[NFCI][SimplifyCFG] Mark all the SimplifyCFG tests that already don't invalidate DomTree as such ... First step after e113317958, in these tests, DomTree is valid afterwards, so mark them as such, so that they don't regress. In further steps, SimplifyCFG transforms shall taught to preserve DomTree, in as small steps as possible.	2020-12-17 01:03:49 +03:00
Jonas Paulsson	c2dafe12dc	[SimplifyCFG] Skip merging return blocks if it would break a CallBr. ... SimplifyCFG should not merge empty return blocks and leave a CallBr behind with a duplicated destination since the verifier will then trigger an assert. This patch checks for this case and avoids the transformation. CodeGenPrepare has a similar check which also has a FIXME comment about why this is needed. It seems perhaps better if these two passes would eventually instead update the CallBr instruction instead of just checking and avoiding. This fixes https://bugs.llvm.org/show_bug.cgi?id=45062. Review: Craig Topper Differential Revision: https://reviews.llvm.org/D75620	2020-03-10 14:59:13 +01:00