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| author | Philip Reames <listmail@philipreames.com> | 2021-02-11 17:55:29 -0800 |
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| committer | Philip Reames <listmail@philipreames.com> | 2021-02-11 17:56:36 -0800 |
| commit | 8ef4b961a3af6e6839b487ba3962ddad133629fc (patch) | |
| tree | 293bd001e89e536fdff054ed509b7c9f949d5632 /llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp | |
| parent | ac2be2b6a366c05c01b8228fd804ba6ed52d320b (diff) | |
| download | llvm-8ef4b961a3af6e6839b487ba3962ddad133629fc.zip llvm-8ef4b961a3af6e6839b487ba3962ddad133629fc.tar.gz llvm-8ef4b961a3af6e6839b487ba3962ddad133629fc.tar.bz2 | |
[knownbits] Preserve known bits for small shift recurrences
The motivation for this is that I'm looking at an example that uses shifts as induction variables. There's lots of other omissions, but one of the first I noticed is that we can't compute tight known bits. (This indirectly causes SCEV's range analysis to produce very poor results as well.)
Differential Revision: https://reviews.llvm.org/D96440
Diffstat (limited to 'llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp')
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