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| author | Daniel Berlin <dberlin@dberlin.org> | 2017-05-08 17:37:29 +0000 |
|---|---|---|
| committer | Daniel Berlin <dberlin@dberlin.org> | 2017-05-08 17:37:29 +0000 |
| commit | 74ffa5c62fd248c3009c615808da8737a45301ab (patch) | |
| tree | e89455f8f51822ac68325e427982bcdba49af7f5 /llvm/lib/IR/ConstantFold.cpp | |
| parent | 0fd1b6c0dce83124e7578e54727ec1058a1882da (diff) | |
| download | bcm5719-llvm-74ffa5c62fd248c3009c615808da8737a45301ab.tar.gz bcm5719-llvm-74ffa5c62fd248c3009c615808da8737a45301ab.zip | |
ConstantFold: Fold getelementptr (i32, i32* null, i64 undef) to null.
Transforms/IndVarSimplify/2011-10-27-lftrnull will fail if this regresses.
Transforms/GVN/PRE/2011-06-01-NonLocalMemdepMiscompile.ll has been changed to still test what it was
trying to test.
llvm-svn: 302446
Diffstat (limited to 'llvm/lib/IR/ConstantFold.cpp')
| -rw-r--r-- | llvm/lib/IR/ConstantFold.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/IR/ConstantFold.cpp b/llvm/lib/IR/ConstantFold.cpp index 80b117015ed..c185933254c 100644 --- a/llvm/lib/IR/ConstantFold.cpp +++ b/llvm/lib/IR/ConstantFold.cpp @@ -2054,7 +2054,8 @@ Constant *llvm::ConstantFoldGetElementPtr(Type *PointeeTy, Constant *C, if (C->isNullValue()) { bool isNull = true; for (unsigned i = 0, e = Idxs.size(); i != e; ++i) - if (!cast<Constant>(Idxs[i])->isNullValue()) { + if (!isa<UndefValue>(Idxs[i]) && + !cast<Constant>(Idxs[i])->isNullValue()) { isNull = false; break; } |
