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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 | 52600ee8c3ed94fb69d6147a640a330e3d7b00ed (patch) | |
| tree | a99b6063ecbb65cc2432da8726ef1a58169a11ff /llvm/lib/Transforms | |
| parent | 5d8f912f50831684e22d525e5d11477eaff6ef31 (diff) | |
| download | bcm5719-llvm-52600ee8c3ed94fb69d6147a640a330e3d7b00ed.tar.gz bcm5719-llvm-52600ee8c3ed94fb69d6147a640a330e3d7b00ed.zip | |
Bitcasts are transitive. Bitcast-Bitcast-X becomes Bitcast-X.
llvm-svn: 138722
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp index ba90bf6b5c5..6c42c0c6600 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp +++ b/llvm/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(); |
