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| author | Nadav Rotem <nadav.rotem@intel.com> | 2011-08-28 11:51:08 +0000 |
|---|---|---|
| committer | Nadav Rotem <nadav.rotem@intel.com> | 2011-08-28 11:51:08 +0000 |
| commit | be6ceb6ebcfb48e09ffab297c1537c87383f0ce9 (patch) | |
| tree | e05e876a1b8886b72f3abe66192ec5fdcbfe0cfa /lib/Transforms/InstCombine | |
| parent | b1b051ec97c4e3c02cea554e169cbb4f85bcb2de (diff) | |
| download | llvm-be6ceb6ebcfb48e09ffab297c1537c87383f0ce9.tar.gz llvm-be6ceb6ebcfb48e09ffab297c1537c87383f0ce9.tar.bz2 llvm-be6ceb6ebcfb48e09ffab297c1537c87383f0ce9.tar.xz | |
Bitcasts are transitive. Bitcast-Bitcast-X becomes Bitcast-X.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138722 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/InstCombine')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineCasts.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineCasts.cpp b/lib/Transforms/InstCombine/InstCombineCasts.cpp index ba90bf6b5c..6c42c0c660 100644 --- a/lib/Transforms/InstCombine/InstCombineCasts.cpp +++ b/lib/Transforms/InstCombine/InstCombineCasts.cpp @@ -1659,6 +1659,11 @@ Instruction *InstCombiner::visitBitCast(BitCastInst &CI) { if (DestTy == Src->getType()) return ReplaceInstUsesWith(CI, Src); + // Bitcasts are transitive. + if (BitCastInst* BSrc = dyn_cast<BitCastInst>(Src)) { + return CastInst::Create(Instruction::BitCast, BSrc->getOperand(0), DestTy); + } + if (PointerType *DstPTy = dyn_cast<PointerType>(DestTy)) { PointerType *SrcPTy = cast<PointerType>(SrcTy); Type *DstElTy = DstPTy->getElementType(); |