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| author | David Majnemer <david.majnemer@gmail.com> | 2015-04-22 20:59:28 +0000 |
|---|---|---|
| committer | David Majnemer <david.majnemer@gmail.com> | 2015-04-22 20:59:28 +0000 |
| commit | fe58d13a17a2824fe891274e1396e5fc1ca5ab38 (patch) | |
| tree | b70e49630309f2cbf60608f0ff7c0517b5efcda0 /llvm/lib/CodeGen/MachineModuleInfo.cpp | |
| parent | a32764453444da90e92ba0041f40b4d94fadf2d4 (diff) | |
| download | llvm-fe58d13a17a2824fe891274e1396e5fc1ca5ab38.zip llvm-fe58d13a17a2824fe891274e1396e5fc1ca5ab38.tar.gz llvm-fe58d13a17a2824fe891274e1396e5fc1ca5ab38.tar.bz2 | |
[InstCombine] Clear out nsw/nuw if we modify computation in the chain
An nsw/nuw operation relies on the values feeding into it to not
overflow if 'poison' is not to be produced. This means that
optimizations which make modifications to the bottom of a chain (like
SimplifyDemandedBits) must strip out nsw/nuw if they cannot ensure that
they will be preserved.
This fixes PR23309.
llvm-svn: 235544
Diffstat (limited to 'llvm/lib/CodeGen/MachineModuleInfo.cpp')
0 files changed, 0 insertions, 0 deletions