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| author | Craig Topper <craig.topper@sifive.com> | 2021-02-28 08:20:57 -0800 |
|---|---|---|
| committer | Craig Topper <craig.topper@sifive.com> | 2021-02-28 08:26:22 -0800 |
| commit | ca5247bb1770a1dfa56b78303d99f1cc9a0a06ee (patch) | |
| tree | ca724b9ef7b704c75c9b59a7e9f16a76a4453bad /llvm/lib/CodeGen/MachinePipeliner.cpp | |
| parent | 1d6a6f3b0c710ccd6558644d195cf939c4995d84 (diff) | |
| download | llvm-ca5247bb1770a1dfa56b78303d99f1cc9a0a06ee.zip llvm-ca5247bb1770a1dfa56b78303d99f1cc9a0a06ee.tar.gz llvm-ca5247bb1770a1dfa56b78303d99f1cc9a0a06ee.tar.bz2 | |
[DAGCombiner] Don't skip no overflow check on UMULO if the first computeKnownBits call doesn't return any 0 bits.
Even if the first computeKnownBits call doesn't have any zero
bits it is possible the other operand has bitwidth-1 leading zero.
In that case overflow is still impossible. So always call computeKnownBits
for both operands.
Diffstat (limited to 'llvm/lib/CodeGen/MachinePipeliner.cpp')
0 files changed, 0 insertions, 0 deletions