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| author | Sanjay Patel <spatel@rotateright.com> | 2020-06-08 11:37:43 -0400 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2020-06-08 11:55:30 -0400 |
| commit | 42f488b63a04fdaa931315bdadecb6d23e20529a (patch) | |
| tree | 90c6ca15c4f2f1ebecb35f048c7aec1e6bf9042d /llvm/lib/Support/SourceMgr.cpp | |
| parent | 8b529e311a9052ee7a0676a1b517728efa44a3ba (diff) | |
| download | llvm-42f488b63a04fdaa931315bdadecb6d23e20529a.zip llvm-42f488b63a04fdaa931315bdadecb6d23e20529a.tar.gz llvm-42f488b63a04fdaa931315bdadecb6d23e20529a.tar.bz2 | |
[InstCombine] improve matching for sext-lshr-trunc patterns
This is intended to preserve the logic of the existing transform,
but remove unnecessary restrictions on uses and types.
https://rise4fun.com/Alive/pYfR
Pre: C1 <= width(C1) - 8
%B = sext i8 %A
%C = lshr %B, C1
%r = trunc %C to i8
=>
%r = ashr i8 %A, trunc(umin(C1, 7))
Diffstat (limited to 'llvm/lib/Support/SourceMgr.cpp')
0 files changed, 0 insertions, 0 deletions