https://bugs.llvm.org/show_bug.cgi?id=46885
Bug ID: 46885
Summary: Arrays should not be out-of-bound accessed.
(llvm-project/llvm/lib/IR/AutoUpgrade.cpp:line 977)
Product: libraries
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Core LLVM classes
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Arrays should not be out-of-bound accessed.
The size of array 'Indices' is 4 (Line:975), 'i' ranges from 0 to 'NumElts' and
'NumElts' is lower than 8 (not 4). So in line 977, 'Indices[i]' could result in
out-of-bound access.
(commit: e3546c78cabfbf670391a57766872f0a8e28a423)
llvm-project/llvm/lib/IR/AutoUpgrade.cpp:
974 if (NumElts < 8) {
975 int Indices[4];
976 for (unsigned i = 0; i != NumElts; ++i)
977 Indices[i] = i;
978 Mask = Builder.CreateShuffleVector(Mask, Mask,
979 makeArrayRef(Indices, NumElts),
980 "extract");
981 }
982
983 return Mask;
984 }
Reported by: Ustchcs Toolsets Bugfinder
(bugfinder-4.5: Arrays should not be out-of-bound accessed.)
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