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| author | David Green <david.green@arm.com> | 2025-08-13 20:57:46 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-08-13 20:57:46 +0100 |
| commit | 06d2d1e15663967f99c7c6c52351ff8210e8b857 (patch) | |
| tree | f43289f6694433d3f0edc2f9f7fd362eace4f668 /llvm/lib | |
| parent | bfd490e0cda0917dfc357ca87f3c0639ba38a56f (diff) | |
| download | llvm-06d2d1e15663967f99c7c6c52351ff8210e8b857.zip llvm-06d2d1e15663967f99c7c6c52351ff8210e8b857.tar.gz llvm-06d2d1e15663967f99c7c6c52351ff8210e8b857.tar.bz2 | |
[ARM] Protect against odd sized vectors in isVTRNMask and friends (#153413)
Fixes the issue reported on #153138, where odd-sized vectors would cause
the checks to iterate off the end of the mask.
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMISelLowering.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp index d386c91..ef5ba4f 100644 --- a/llvm/lib/Target/ARM/ARMISelLowering.cpp +++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp @@ -7406,7 +7406,7 @@ static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) { return false; unsigned NumElts = VT.getVectorNumElements(); - if (M.size() != NumElts && M.size() != NumElts*2) + if ((M.size() != NumElts && M.size() != NumElts * 2) || NumElts % 2 != 0) return false; // If the mask is twice as long as the input vector then we need to check the @@ -7438,7 +7438,7 @@ static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){ return false; unsigned NumElts = VT.getVectorNumElements(); - if (M.size() != NumElts && M.size() != NumElts*2) + if ((M.size() != NumElts && M.size() != NumElts * 2) || NumElts % 2 != 0) return false; for (unsigned i = 0; i < M.size(); i += NumElts) { @@ -7541,7 +7541,7 @@ static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) { return false; unsigned NumElts = VT.getVectorNumElements(); - if (M.size() != NumElts && M.size() != NumElts*2) + if ((M.size() != NumElts && M.size() != NumElts * 2) || NumElts % 2 != 0) return false; for (unsigned i = 0; i < M.size(); i += NumElts) { @@ -7574,7 +7574,7 @@ static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){ return false; unsigned NumElts = VT.getVectorNumElements(); - if (M.size() != NumElts && M.size() != NumElts*2) + if ((M.size() != NumElts && M.size() != NumElts * 2) || NumElts % 2 != 0) return false; for (unsigned i = 0; i < M.size(); i += NumElts) { |