We were not correctly splitting a blocks for chains of length 1.
This supersedes D92364.
Test case by MaskRay (Fangrui Song).
courbet on Dec 1 2020, 2:32 AM.Authored by
As a follow-up, would be good adding some tests where the pointer operand of a GEP references an instruction defined in a basic block. Currently in all tests the pointer operands refer to arguments.