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| author | Nadav Rotem <nadav.rotem@intel.com> | 2011-08-29 19:58:36 +0000 |
|---|---|---|
| committer | Nadav Rotem <nadav.rotem@intel.com> | 2011-08-29 19:58:36 +0000 |
| commit | 89879ec76b5d81b0cc82e9f402dfe7c4cc63b0d6 (patch) | |
| tree | 63b76e1c8cfe9857bd47b0b7aa99da40baace8dd /lib/Analysis/ConstantFolding.cpp | |
| parent | 0da10cf44d0f22111dae728bb535ade2283d976b (diff) | |
Fixes following the CR by Chris and Duncan:
Optimize chained bitcasts of the form A->B->A.
Undo r138722 and change isEliminableCastPair to allow this case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138756 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ConstantFolding.cpp')
| -rw-r--r-- | lib/Analysis/ConstantFolding.cpp | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/lib/Analysis/ConstantFolding.cpp b/lib/Analysis/ConstantFolding.cpp index 613804d6d2..df79849c3c 100644 --- a/lib/Analysis/ConstantFolding.cpp +++ b/lib/Analysis/ConstantFolding.cpp @@ -51,12 +51,6 @@ static Constant *FoldBitCast(Constant *C, Type *DestTy, if (C->isAllOnesValue() && !DestTy->isX86_MMXTy()) return Constant::getAllOnesValue(DestTy); - // Bitcast of Bitcast can be done using a single cast. - ConstantExpr *CE = dyn_cast<ConstantExpr>(C); - if (CE && CE->getOpcode() == Instruction::BitCast) { - return ConstantExpr::getBitCast(CE->getOperand(0), DestTy); - } - // The code below only handles casts to vectors currently. VectorType *DestVTy = dyn_cast<VectorType>(DestTy); if (DestVTy == 0) |