Alex Zinenko 1ec60862d7 [mlir] Avoid cloning ops in SCF parallel conversion to CFG ... The existing implementation of the conversion from SCF Parallel operation to SCF "for" loops in order to further convert those loops to branch-based CFG has been cloning the loop and reduction body operations into the new loop because ConversionPatternRewriter was missing support for moving blocks while replacing their arguments. This functionality now available, use it to implement the conversion and avoid cloning operations, which may lead to doubling of the IR size during the conversion. In addition, this fixes an issue with converting nested SCF "if" conditionals present in "parallel" operations that would cause the conversion infrastructure to stop because of the repeated application of the pattern converting "newly" created "if"s (which were in fact just moved). Arguably, this should be fixed at the infrastructure level and this fix is a workaround. Reviewed By: herhut Differential Revision: https://reviews.llvm.org/D91955		2020-11-23 14:01:22 +01:00
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convert-to-cfg.mlir	[mlir] Avoid cloning ops in SCF parallel conversion to CFG	2020-11-23 14:01:22 +01:00