Minor optimization to skip null check in generated code where it isn't
necessary. llvm-svn: 86741
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@ -128,6 +128,13 @@ CodeGenFunction::GetAddressCXXOfBaseClass(llvm::Value *BaseValue,
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return Builder.CreateBitCast(BaseValue, BasePtrTy);
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}
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llvm::Value *Offset =
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GetCXXBaseClassOffset(*this, BaseValue, ClassDecl, BaseClassDecl);
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// If there is no offset, simply cast the pointer and return it.
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if (!Offset)
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return Builder.CreateBitCast(BaseValue, BasePtrTy);
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llvm::BasicBlock *CastNull = 0;
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llvm::BasicBlock *CastNotNull = 0;
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llvm::BasicBlock *CastEnd = 0;
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@ -146,14 +153,9 @@ CodeGenFunction::GetAddressCXXOfBaseClass(llvm::Value *BaseValue,
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const llvm::Type *Int8PtrTy = llvm::Type::getInt8PtrTy(VMContext);
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llvm::Value *Offset =
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GetCXXBaseClassOffset(*this, BaseValue, ClassDecl, BaseClassDecl);
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if (Offset) {
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// Apply the offset.
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BaseValue = Builder.CreateBitCast(BaseValue, Int8PtrTy);
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BaseValue = Builder.CreateGEP(BaseValue, Offset, "add.ptr");
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}
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// Cast back.
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BaseValue = Builder.CreateBitCast(BaseValue, BasePtrTy);
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