#include "llvm/ADT/APInt.h"
#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include <string>
namespace llvm {
-
+class Value;
class ConstraintSystem {
/// Current linear constraints in the system.
/// An entry of the form c0, c1, ... cn represents the following constraint:
/// c0 >= v0 * c1 + .... + v{n-1} * cn
SmallVector<SmallVector<int64_t, 8>, 4> Constraints;
+ /// a Map between variabled collected in ConstraintElimination and their
+ /// corresponding index in the constraint system solver.
+ DenseMap<Value *, unsigned> Value2Index;
+
/// Current greatest common divisor for all coefficients in the system.
uint32_t GCD = 1;
return true;
}
+ DenseMap<Value *, unsigned> &getValue2Index() { return Value2Index; }
+ const DenseMap<Value *, unsigned> &getValue2Index() const {
+ return Value2Index;
+ }
+
bool addVariableRowFill(ArrayRef<int64_t> R) {
// If all variable coefficients are 0, the constraint does not provide any
// usable information.
/// based on signed-ness, certain conditions can be transferred between the two
/// systems.
class ConstraintInfo {
- DenseMap<Value *, unsigned> UnsignedValue2Index;
- DenseMap<Value *, unsigned> SignedValue2Index;
ConstraintSystem UnsignedCS;
ConstraintSystem SignedCS;
ConstraintInfo(const DataLayout &DL) : DL(DL) {}
DenseMap<Value *, unsigned> &getValue2Index(bool Signed) {
- return Signed ? SignedValue2Index : UnsignedValue2Index;
+ return Signed ? SignedCS.getValue2Index() : UnsignedCS.getValue2Index();
}
const DenseMap<Value *, unsigned> &getValue2Index(bool Signed) const {
- return Signed ? SignedValue2Index : UnsignedValue2Index;
+ return Signed ? SignedCS.getValue2Index() : UnsignedCS.getValue2Index();
}
ConstraintSystem &getCS(bool Signed) {