forked from OSchip/llvm-project
947be0fa66
Summary: This is part of a serious of patches to evolve ADCE.cpp to support removing of unnecessary control flow. This patch changes the data structures to hold liveness information to support the additional information we will eventually need. In particular we now have a notion of basic blocks being live because they contain a live operations. This will eventually feed into control dependence analysis of which branches are live. We cater to getting from instructions to associated block information and from blocks to information about their terminators. This patch also changes the structure of the main loop of the algorithm so that it alternates propagating liveness between instructions and usign control dependence information to mark branches live. We force all terminators live for now until we add code to handlinge removing control flow in a later patch. No changes to effective behavior with this patch Previous patches: D23065 [ADCE] Refactor anticipating new functionality (NFC) D23102 [ADCE] Refactoring for new functionality (NFC) Reviewers: nadav, majnemer, mehdi_amini Subscribers: freik, twoh, llvm-commits Differential Revision: https://reviews.llvm.org/D23225 llvm-svn: 278807 |
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| clang | ||
| clang-tools-extra | ||
| compiler-rt | ||
| debuginfo-tests | ||
| libclc | ||
| libcxx | ||
| libcxxabi | ||
| libunwind | ||
| lld | ||
| lldb | ||
| llgo | ||
| llvm | ||
| openmp | ||
| parallel-libs | ||
| polly | ||