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| author | James Molloy <james.molloy@arm.com> | 2015-09-24 16:06:32 +0000 |
|---|---|---|
| committer | James Molloy <james.molloy@arm.com> | 2015-09-24 16:06:32 +0000 |
| commit | b6be1ebb7d53475c4edd88131efd52a84e1b6b23 (patch) | |
| tree | 768162cdb68ab434730a0473eff68f25e23930c2 /llvm/lib/Support/TargetParser.cpp | |
| parent | bd432b2d04b2aa0a42ec6c222e898baed339980e (diff) | |
| download | llvm-b6be1ebb7d53475c4edd88131efd52a84e1b6b23.zip llvm-b6be1ebb7d53475c4edd88131efd52a84e1b6b23.tar.gz llvm-b6be1ebb7d53475c4edd88131efd52a84e1b6b23.tar.bz2 | |
[ValueTracking] Teach isKnownNonZero a new trick
If the shifter operand is a constant, and all of the bits shifted out
are known to be zero, then if X is known non-zero at least one
non-zero bit must remain.
llvm-svn: 248508
Diffstat (limited to 'llvm/lib/Support/TargetParser.cpp')
0 files changed, 0 insertions, 0 deletions