diff options
| author | Huihui Zhang <huihuiz@quicinc.com> | 2019-06-25 20:44:52 +0000 |
|---|---|---|
| committer | Huihui Zhang <huihuiz@quicinc.com> | 2019-06-25 20:44:52 +0000 |
| commit | b90cb57b63aec4a234d1a138e31af4e0b603ccff (patch) | |
| tree | a83b2dbd95e567f6bea556e4be5d5a21d79172f0 /lldb/packages/Python/lldbsuite | |
| parent | dcd7eb710bc4b782c298ee30ee0143d788e72c97 (diff) | |
| download | bcm5719-llvm-b90cb57b63aec4a234d1a138e31af4e0b603ccff.tar.gz bcm5719-llvm-b90cb57b63aec4a234d1a138e31af4e0b603ccff.zip | |
[InstCombine] Simplify icmp ult/uge (shl %x, C2), C1 iff C1 is power of two -> icmp eq/ne (and %x, (lshr -C1, C2)), 0.
Simplify 'shl' inequality test into 'and' equality test.
This pattern happens in the middle-end while simplifying bitfield access,
Exposed in https://reviews.llvm.org/D63505
https://rise4fun.com/Alive/6uz
Reviewers: lebedev.ri, efriedma
Reviewed By: lebedev.ri
Subscribers: spatel, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D63675
llvm-svn: 364348
Diffstat (limited to 'lldb/packages/Python/lldbsuite')
0 files changed, 0 insertions, 0 deletions
