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| author | Roman Lebedev <lebedev.ri@gmail.com> | 2019-06-28 15:32:52 +0000 |
|---|---|---|
| committer | Roman Lebedev <lebedev.ri@gmail.com> | 2019-06-28 15:32:52 +0000 |
| commit | 9f1dffdb024f4caa4aace4804aa4ac46dba523da (patch) | |
| tree | 14d4fb76e3e7b47dfc1ac922fcea988ac0723851 /llvm/lib/Target/ARM/ARMSelectionDAGInfo.cpp | |
| parent | d12966c088357bcdf6fbc796f6414cd019f1996a (diff) | |
| download | bcm5719-llvm-9f1dffdb024f4caa4aace4804aa4ac46dba523da.tar.gz bcm5719-llvm-9f1dffdb024f4caa4aace4804aa4ac46dba523da.zip | |
[NFC][InstCombine] Shift amount reassociation: add flag preservation test
As discussed in https://reviews.llvm.org/D63812#inline-569870
* exact on both lshr => exact https://rise4fun.com/Alive/plHk
* exact on both ashr => exact https://rise4fun.com/Alive/QDAA
* nuw on both shl => nuw https://rise4fun.com/Alive/5Uk
* nsw on both shl => nsw https://rise4fun.com/Alive/0plg
So basically if the same flag is set on both original shifts -> set it on new shift.
Don't think we can do anything with non-matching flags on shl.
llvm-svn: 364652
Diffstat (limited to 'llvm/lib/Target/ARM/ARMSelectionDAGInfo.cpp')
0 files changed, 0 insertions, 0 deletions
