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| author | Vitaly Buka <vitalybuka@google.com> | 2019-07-12 02:23:07 +0000 |
|---|---|---|
| committer | Vitaly Buka <vitalybuka@google.com> | 2019-07-12 02:23:07 +0000 |
| commit | 52096ee9a96e1678b82ec225bceb9276b41303e7 (patch) | |
| tree | 55bcc9b2fa206a63a109ba63c297f411e08959b5 /llvm/lib/Analysis/ValueTracking.cpp | |
| parent | 8bd441af8b84165ca904772b1e73eaaed4fbe71a (diff) | |
| download | llvm-52096ee9a96e1678b82ec225bceb9276b41303e7.zip llvm-52096ee9a96e1678b82ec225bceb9276b41303e7.tar.gz llvm-52096ee9a96e1678b82ec225bceb9276b41303e7.tar.bz2 | |
Return Undef from isBytewiseValue for empty arrays or structs
Reviewers: pcc, eugenis
Subscribers: hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D64052
llvm-svn: 365864
Diffstat (limited to 'llvm/lib/Analysis/ValueTracking.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index 6857cf4..cf8fa9c 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -3178,6 +3178,10 @@ Value *llvm::isBytewiseValue(Value *V, const DataLayout &DL) { if (isa<UndefValue>(V)) return UndefInt8; + const uint64_t Size = DL.getTypeStoreSize(V->getType()); + if (!Size) + return UndefInt8; + Constant *C = dyn_cast<Constant>(V); if (!C) { // Conceptually, we could handle things like: |