en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/Transforms/FixIrreducible/nested.ll#8c11bc0c Introduce fix-irreducible passAn irreducible SCC is one which has multiple "header" blocks, i.e., blockswith control-flow edges incident from outside the SCC. This pass converts anirreducible SCC into a natural loop by introducing a single new headerblock and redirecting all the edges on the original headers to thisnew block.This is a useful workaround for a limitation in the structurizerwhich, which produces incorrect control flow in the presence ofirreducible regions. The AMDGPU backend provides an option toenable this pass before the structurizer, which may eventually beenabled by default.Reviewed By: nhaehnleDifferential Revision: https://reviews.llvm.org/D77198This restores commit 2ada8e2525dd2653f30c8696a27162a3b1647d66.Originally reverted with commit 44e09b59b869a91bf47d76e8bc569d9ee91ad145. List of files: /llvm-project-15.0.7/llvm/test/Transforms/FixIrreducible/nested.ll Wed, 15 Apr 2020 09:35:51 +0000 Sameer Sahasrabuddhe <sameer.sahasrabuddhe@amd.com> http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/Transforms/FixIrreducible/nested.ll#2ada8e25 Introduce fix-irreducible passAn irreducible SCC is one which has multiple "header" blocks, i.e., blockswith control-flow edges incident from outside the SCC. This pass converts anirreducible SCC into a natural loop by introducing a single new headerblock and redirecting all the edges on the original headers to thisnew block.This is a useful workaround for a limitation in the structurizerwhich, which produces incorrect control flow in the presence ofirreducible regions. The AMDGPU backend provides an option toenable this pass before the structurizer, which may eventually beenabled by default.Reviewed By: nhaehnleDifferential Revision: https://reviews.llvm.org/D77198 List of files: /llvm-project-15.0.7/llvm/test/Transforms/FixIrreducible/nested.ll Wed, 15 Apr 2020 05:59:19 +0000 Sameer Sahasrabuddhe <sameer.sahasrabuddhe@amd.com>