From 595b3dfcbe0c3f6d8aab594a9c1997c3f38af381 Mon Sep 17 00:00:00 2001 From: Nick Lewycky Date: Sun, 20 Sep 2009 02:11:47 +0000 Subject: [PATCH] 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 --- llvm/lib/VMCore/ConstantFold.cpp | 15 --------------- 1 file changed, 15 deletions(-) diff --git a/llvm/lib/VMCore/ConstantFold.cpp b/llvm/lib/VMCore/ConstantFold.cpp index 3cd4a9f78b82..7bf4f094e80c 100644 --- a/llvm/lib/VMCore/ConstantFold.cpp +++ b/llvm/lib/VMCore/ConstantFold.cpp @@ -1248,21 +1248,6 @@ static ICmpInst::Predicate evaluateICmpRelation(LLVMContext &Context, Constant::getNullValue(CE1Op0->getType()), sgnd); } - - // If the dest type is a pointer type, and the RHS is a constantexpr cast - // from the same type as the src of the LHS, evaluate the inputs. This is - // important for things like "icmp eq (cast 4 to int*), (cast 5 to int*)", - // which happens a lot in compilers with tagged integers. - if (ConstantExpr *CE2 = dyn_cast(V2)) - if (CE2->isCast() && isa(CE1->getType()) && - CE1->getOperand(0)->getType() == CE2->getOperand(0)->getType() && - CE1->getOperand(0)->getType()->isInteger()) { - bool sgnd = isSigned; - if (CE1->getOpcode() == Instruction::ZExt) isSigned = false; - if (CE1->getOpcode() == Instruction::SExt) isSigned = true; - return evaluateICmpRelation(Context, CE1->getOperand(0), - CE2->getOperand(0), sgnd); - } break; case Instruction::GetElementPtr: