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| author | Florian Hahn <flo@fhahn.com> | 2021-05-29 18:50:14 +0100 |
|---|---|---|
| committer | Florian Hahn <flo@fhahn.com> | 2021-05-30 11:40:55 +0100 |
| commit | 126f90b252509486eab5bfbe06894805b26c8da2 (patch) | |
| tree | 3cb33bcb1aedb676a1f889a4326085bbc5110beb /llvm/lib/CodeGen/LiveDebugVariables.cpp | |
| parent | 71acce68daf4987529bf08d81a9c5d396536d7c4 (diff) | |
| download | llvm-126f90b252509486eab5bfbe06894805b26c8da2.zip llvm-126f90b252509486eab5bfbe06894805b26c8da2.tar.gz llvm-126f90b252509486eab5bfbe06894805b26c8da2.tar.bz2 | |
[DAGCombine] Poison-prove scalarizeExtractedVectorLoad.
extractelement is poison if the index is out-of-bounds, so just
scalarizing the load may introduce an out-of-bounds load, which is UB.
To avoid introducing new UB, we can mask the index so it only contains
valid indices.
Fixes PR50382.
Reviewed By: efriedma
Differential Revision: https://reviews.llvm.org/D103077
Diffstat (limited to 'llvm/lib/CodeGen/LiveDebugVariables.cpp')
0 files changed, 0 insertions, 0 deletions