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Jakub Kuderski 892202cb99 [LoopRotate] Fix DomTree update logic for unreachable nodes. Fix PR33701. 
Summary:
LoopRotate manually updates the DoomTree by iterating over all predecessors of a basic block and computing the Nearest Common Dominator.

When a predecessor happens to be unreachable, `DT.findNearestCommonDominator` returns nullptr.

This patch teaches LoopRotate to handle this case and fixes [[ https://bugs.llvm.org/show_bug.cgi?id=33701 | PR33701 ]].

In the future, LoopRotate should be taught to use the new incremental API for updating the DomTree.

Reviewers: dberlin, davide, uabelho, grosser

Subscribers: efriedma, mzolotukhin

Differential Revision: https://reviews.llvm.org/D35074

llvm-svn: 307828
2017-07-12 18:42:16 +00:00
bindings [NFC] Remove multiple semicolons 2017-06-28 23:15:16 +00:00
cmake [CMake] Support multi-target runtimes build 2017-07-11 23:41:15 +00:00
docs Add element atomic memmove intrinsic 2017-07-12 15:25:26 +00:00
examples [ORC] Errorize the ORC APIs. 2017-07-07 02:59:13 +00:00
include [CodeGen] Add dependency printer 2017-07-12 15:30:59 +00:00
lib [LoopRotate] Fix DomTree update logic for unreachable nodes. Fix PR33701. 2017-07-12 18:42:16 +00:00
projects Add temporary workaround to allow in-tree libc++ builds on Windows 2017-05-11 01:44:30 +00:00
resources
runtimes [CMake] Support multi-target runtimes build 2017-07-11 23:41:15 +00:00
test [LoopRotate] Fix DomTree update logic for unreachable nodes. Fix PR33701. 2017-07-12 18:42:16 +00:00
tools [WebAssembly] Expose the offset of each data segment 2017-07-12 00:24:54 +00:00
unittests [PM] Fix a silly bug in my recent update to the CG update logic. 2017-07-12 09:08:11 +00:00
utils [lit] Fix import StringIO errors in Python 3 2017-07-11 16:12:53 +00:00
.arcconfig project_id is from another era in phabricator land and does not provide any value. 2016-09-27 15:47:29 +00:00
.clang-format Test commit. 2014-03-02 13:08:46 +00:00
.clang-tidy .clang-tidy: correct style name is 'camelBack' not 'lowerCase'. 2016-09-13 19:04:26 +00:00
.gitignore gitignore: Ignore .vs folder (VS2017 config files) 2017-04-08 00:16:58 +00:00
CMakeLists.txt CMake: Add LLVM_UTILS_INSTALL_DIR option 2017-07-05 12:57:30 +00:00
CODE_OWNERS.TXT Remove the BBVectorize pass. 2017-06-30 07:09:08 +00:00
configure
CREDITS.TXT Another test commit 2017-07-01 03:24:06 +00:00
LICENSE.TXT Bump year to 2017 in LICENSE.txt 2017-01-12 18:02:42 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT Update the release tester for MIPS. NFC. 2017-01-17 11:00:28 +00:00

README.txt 

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