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| author | Max Kazantsev <max.kazantsev@azul.com> | 2018-11-19 05:54:38 +0000 |
|---|---|---|
| committer | Max Kazantsev <max.kazantsev@azul.com> | 2018-11-19 05:54:38 +0000 |
| commit | 8e3e33d1384466523c25d4493842e0de61d3e19f (patch) | |
| tree | 78f27f47f4bdc3c5f6373fe4a3600ec2319e64ac /clang/unittests/Basic/FileManagerTest.cpp | |
| parent | e7b789b5293b179b7972d6d3d6b85e010f221e66 (diff) | |
| download | llvm-8e3e33d1384466523c25d4493842e0de61d3e19f.zip llvm-8e3e33d1384466523c25d4493842e0de61d3e19f.tar.gz llvm-8e3e33d1384466523c25d4493842e0de61d3e19f.tar.bz2 | |
[LoopSimplifyCFG] Teach LoopSimplifyCFG to constant-fold branches and switches
This patch introduces infrastructure and the simplest case for constant-folding
of branch and switch instructions within loop into unconditional branches.
It is useful as a cleanup for such passes as loop unswitching that sometimes
produce such branches.
Only the simplest case supported in this patch: after the folding, no block
should become dead or stop being part of the loop. Support for more
sophisticated cases will go separately in follow-up patches.
Differential Revision: https://reviews.llvm.org/D54021
Reviewed By: anna
llvm-svn: 347183
Diffstat (limited to 'clang/unittests/Basic/FileManagerTest.cpp')
0 files changed, 0 insertions, 0 deletions