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| author | Craig Topper <craig.topper@gmail.com> | 2017-05-07 22:22:11 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2017-05-07 22:22:11 +0000 |
| commit | 7e3e7afca87f5bbd6ce416e483b26c36ea384ecf (patch) | |
| tree | e9d095ff83c51b24797bc8f88026029997e02f29 /llvm/lib/Object/COFFObjectFile.cpp | |
| parent | cedc1ec3dc89abc5ea74389aaf5e12c3e333bf0d (diff) | |
| download | bcm5719-llvm-7e3e7afca87f5bbd6ce416e483b26c36ea384ecf.tar.gz bcm5719-llvm-7e3e7afca87f5bbd6ce416e483b26c36ea384ecf.zip | |
[ConstantRange][SimplifyCFG] Add a helper method to allow SimplifyCFG to determine if a ConstantRange has more than 8 elements without requiring an allocation if the ConstantRange is 64-bits wide.
Previously SimplifyCFG used getSetSize which returns an APInt that is 1 bit wider than the ConstantRange's bit width. In the reasonably common case that the ConstantRange is 64-bits wide, this requires returning a 65-bit APInt. APInt's can only store 64-bits without a memory allocation so this is inefficient.
The new method takes the 8 as an input and tells if the range contains more than that many elements without requiring any wider math.
llvm-svn: 302385
Diffstat (limited to 'llvm/lib/Object/COFFObjectFile.cpp')
0 files changed, 0 insertions, 0 deletions
