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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-02-19 18:08:16 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2018-02-19 18:08:16 +0000 |
| commit | 70eb508605562978d81fc1110a770ba97715f994 (patch) | |
| tree | bf93d15b7874c2344826da40031bd8a9ae1e60c4 /llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | |
| parent | 4c4a9835a2854590f38b88e9e7c4daf780dee0f9 (diff) | |
| download | bcm5719-llvm-70eb508605562978d81fc1110a770ba97715f994.tar.gz bcm5719-llvm-70eb508605562978d81fc1110a770ba97715f994.zip | |
[SelectionDAG] ComputeKnownBits - add support for SMIN+SMAX clamp patterns
If we have a clamp pattern, SMIN(SMAX(X, LO),HI) or SMAX(SMIN(X, HI),LO) then we can deduce that the number of signbits (zeros/ones) will be at least the minimum of the LO and HI constants.
ComputeKnownBits equivalent of D43338.
Differential Revision: https://reviews.llvm.org/D43463
llvm-svn: 325521
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
0 files changed, 0 insertions, 0 deletions
