e585b332e4
Details: https://reviews.llvm.org/D96805 changed the GCNTTIImpl::getCFInstrCost to return 1 for the PHI nodes for the TTI::TCK_CodeSize and TTI::TCK_SizeAndLatency. This is incorrect because the value moves that are the result of the PHI lowering are inserted into the basic block predecessors - not into the block itself. As a result of this change LoopRotate and LoopUnroll were broken because of the incorrect Loop header and loop body size/cost estimation. Reviewed By: rampitec Differential Revision: https://reviews.llvm.org/D105104