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Nirav Dave 610036c506 [DAG] Set up infrastructure to avoid smart constructor-based dangling nodes 
Summary:
Various SelectionDAG non-combine operations (e.g. the getNode smart
constructor and legalization) may leave dangling nodes by applying
optimizations without fully pruning unused result values. This results
in nodes that are never added to the worklist and therefore can not be
pruned.

Add a node inserter for the combiner to make sure such nodes have the
chance of being pruned. This allows a number of additional peephole
optimizations.

Reviewers: efriedma, RKSimon, craig.topper, jyknight

Reviewed By: jyknight

Subscribers: msearles, jyknight, sdardis, nemanjai, javed.absar, hiraditya, jrtc27, atanasyan, jsji, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58068

llvm-svn: 357279
 		2019-03-29 17:26:40 +00:00
clang [fuchsia] Add clang-doc to Fuchsia distribution 2019-03-29 16:56:37 +00:00
clang-tools-extra [clang-doc] Build as clang_tool 2019-03-29 16:56:36 +00:00
compiler-rt [Sanitizer] Add interceptor for wctomb 2019-03-29 08:39:03 +00:00
debuginfo-tests Set config.lit_tools_dir, which is needed by lit.llvm.initialize. 2018-11-06 21:54:27 +00:00
libclc travis: Add LLVM-8 build 2019-03-27 21:28:31 +00:00
libcxx Mark fenv.h as a system header before the #include_next directive 2019-03-29 16:03:57 +00:00
libcxxabi Revert "[runtimes] Move libunwind, libc++abi and libc++ to lib/ and include/" 2019-03-08 20:33:55 +00:00
libunwind Revert "[runtimes] Move libunwind, libc++abi and libc++ to lib/ and include/" 2019-03-08 20:33:55 +00:00
lld [ELF][MachO][wasm] Simplify range-style std::find{,_if} with STLExtras.h utilities. NFC 2019-03-29 16:21:16 +00:00
lldb [Python] Remove readline module 2019-03-29 17:12:08 +00:00
llgo IR: Support parsing numeric block ids, and emit them in textual output. 2019-03-22 18:27:13 +00:00
llvm [DAG] Set up infrastructure to avoid smart constructor-based dangling nodes 2019-03-29 17:26:40 +00:00
openmp [libomptarget] Introduce LIBOMPTARGET_ENABLE_DEBUG cmake option. 2019-03-26 15:19:15 +00:00
parallel-libs Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
polly Apply include-what-you-use #include removal suggestions. NFC. 2019-03-28 20:19:49 +00:00
pstl [pstl] Uglify internal names of the library 2019-03-28 19:10:32 +00:00
.arcconfig Update monorepo .arcconfig with new project callsign. 2019-01-31 14:34:59 +00:00
.clang-format Add .clang-tidy and .clang-format files to the toplevel of the 2019-01-29 16:43:16 +00:00
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
README.md
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README.md

The LLVM Compiler Infrastructure

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.