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Eliminate use of ConstantHandling itf

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llvm-svn: 10780
This commit is contained in:
Chris Lattner 2004-01-12 17:57:32 +00:00
parent 5a9246fb56
commit a2612e417c
1 changed files with 13 additions and 12 deletions
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25
lib/Analysis/BasicAliasAnalysis.cpp
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@ -22,7 +22,7 @@
#include "llvm/Pass.h"
#include "llvm/Argument.h"
#include "llvm/iOther.h"
#include "llvm/ConstantHandling.h"
#include "llvm/Constants.h"
#include "llvm/GlobalValue.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Target/TargetData.h"
@ -359,17 +359,18 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
const Value *G1Oper = GEP1Ops[FirstConstantOper];
const Value *G2Oper = GEP2Ops[FirstConstantOper];
if (G1Oper != G2Oper && // Found non-equal constant indexes...
isa<Constant>(G1Oper) && isa<Constant>(G2Oper)) {
// Make sure they are comparable (ie, not constant expressions)... and
// make sure the GEP with the smaller leading constant is GEP1.
ConstantBool *Compare = *cast<Constant>(G1Oper) > *cast<Constant>(G2Oper);
if (Compare) { // If they are comparable...
if (Compare->getValue())
std::swap(GEP1Ops, GEP2Ops); // Make GEP1 < GEP2
break;
}
}
if (G1Oper != G2Oper) // Found non-equal constant indexes...
if (Constant *G1OC = dyn_cast<Constant>(const_cast<Value*>(G1Oper)))
if (Constant *G2OC = dyn_cast<Constant>(const_cast<Value*>(G2Oper))) {
// Make sure they are comparable (ie, not constant expressions)...
// and make sure the GEP with the smaller leading constant is GEP1.
Constant *Compare = ConstantExpr::get(Instruction::SetGT, G1OC, G2OC);
if (ConstantBool *CV = dyn_cast<ConstantBool>(Compare)) {
if (CV->getValue()) // If they are comparable and G2 > G1
std::swap(GEP1Ops, GEP2Ops); // Make GEP1 < GEP2
break;
}
}
BasePtr1Ty = cast<CompositeType>(BasePtr1Ty)->getTypeAtIndex(G1Oper);
}