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| author | David Majnemer <david.majnemer@gmail.com> | 2014-10-19 08:23:08 +0000 |
|---|---|---|
| committer | David Majnemer <david.majnemer@gmail.com> | 2014-10-19 08:23:08 +0000 |
| commit | 59939acd2684708a1c617f9e42b2206956804bb6 (patch) | |
| tree | 1861266aaa9d1539694c41dd23e83643222b98f7 /llvm/lib/Analysis/ValueTracking.cpp | |
| parent | a801dd5799bd6f6641ce3a7ea48f32d274ef95a0 (diff) | |
| download | bcm5719-llvm-59939acd2684708a1c617f9e42b2206956804bb6.tar.gz bcm5719-llvm-59939acd2684708a1c617f9e42b2206956804bb6.zip | |
InstCombine: Optimize icmp eq/ne (shl Const2, A), Const1
The following implements the optimization for sequences of the form:
icmp eq/ne (shl Const2, A), Const1
Such sequences can be transformed to:
icmp eq/ne A, (TrailingZeros(Const1) - TrailingZeros(Const2))
This handles only the equality operators for now. Other operators need
to be handled.
Patch by Ankur Garg!
llvm-svn: 220162
Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
0 files changed, 0 insertions, 0 deletions
