forked from OSchip/llvm-project
Delete dead code. sext and zext can not turn integers into pointers. Further,
the optimization described in the comment is only valid with target data. llvm-svn: 82353
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@ -1248,21 +1248,6 @@ static ICmpInst::Predicate evaluateICmpRelation(LLVMContext &Context,
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Constant::getNullValue(CE1Op0->getType()),
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sgnd);
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}
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// If the dest type is a pointer type, and the RHS is a constantexpr cast
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// from the same type as the src of the LHS, evaluate the inputs. This is
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// important for things like "icmp eq (cast 4 to int*), (cast 5 to int*)",
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// which happens a lot in compilers with tagged integers.
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if (ConstantExpr *CE2 = dyn_cast<ConstantExpr>(V2))
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if (CE2->isCast() && isa<PointerType>(CE1->getType()) &&
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CE1->getOperand(0)->getType() == CE2->getOperand(0)->getType() &&
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CE1->getOperand(0)->getType()->isInteger()) {
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bool sgnd = isSigned;
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if (CE1->getOpcode() == Instruction::ZExt) isSigned = false;
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if (CE1->getOpcode() == Instruction::SExt) isSigned = true;
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return evaluateICmpRelation(Context, CE1->getOperand(0),
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CE2->getOperand(0), sgnd);
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}
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break;
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case Instruction::GetElementPtr:
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