//
//===----------------------------------------------------------------------===//
-#include "llvm/Constants.h"
+#include "llvm/InstrTypes.h"
#include "llvm/Support/ConstantRange.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Instructions.h"
using namespace llvm;
/// Initialize a full (the default) or empty set for the specified type.
ConstantRange ConstantRange::makeICmpRegion(unsigned Pred,
const ConstantRange &CR) {
+ if (CR.isEmptySet())
+ return CR;
+
uint32_t W = CR.getBitWidth();
switch (Pred) {
default: assert(!"Invalid ICmp predicate to makeICmpRegion()");
- case ICmpInst::ICMP_EQ:
+ case CmpInst::ICMP_EQ:
return CR;
- case ICmpInst::ICMP_NE:
+ case CmpInst::ICMP_NE:
if (CR.isSingleElement())
return ConstantRange(CR.getUpper(), CR.getLower());
return ConstantRange(W);
- case ICmpInst::ICMP_ULT:
- return ConstantRange(APInt::getMinValue(W), CR.getUnsignedMax());
- case ICmpInst::ICMP_SLT:
- return ConstantRange(APInt::getSignedMinValue(W), CR.getSignedMax());
- case ICmpInst::ICMP_ULE: {
+ case CmpInst::ICMP_ULT: {
+ APInt UMax(CR.getUnsignedMax());
+ if (UMax.isMinValue())
+ return ConstantRange(W, /* empty */ false);
+ return ConstantRange(APInt::getMinValue(W), UMax);
+ }
+ case CmpInst::ICMP_SLT: {
+ APInt SMax(CR.getSignedMax());
+ if (SMax.isMinSignedValue())
+ return ConstantRange(W, /* empty */ false);
+ return ConstantRange(APInt::getSignedMinValue(W), SMax);
+ }
+ case CmpInst::ICMP_ULE: {
APInt UMax(CR.getUnsignedMax());
if (UMax.isMaxValue())
return ConstantRange(W);
return ConstantRange(APInt::getMinValue(W), UMax + 1);
}
- case ICmpInst::ICMP_SLE: {
+ case CmpInst::ICMP_SLE: {
APInt SMax(CR.getSignedMax());
- if (SMax.isMaxSignedValue() || (SMax+1).isMaxSignedValue())
+ if (SMax.isMaxSignedValue())
return ConstantRange(W);
return ConstantRange(APInt::getSignedMinValue(W), SMax + 1);
}
- case ICmpInst::ICMP_UGT:
- return ConstantRange(CR.getUnsignedMin() + 1, APInt::getNullValue(W));
- case ICmpInst::ICMP_SGT:
- return ConstantRange(CR.getSignedMin() + 1,
- APInt::getSignedMinValue(W));
- case ICmpInst::ICMP_UGE: {
+ case CmpInst::ICMP_UGT: {
+ APInt UMin(CR.getUnsignedMin());
+ if (UMin.isMaxValue())
+ return ConstantRange(W, /* empty */ false);
+ return ConstantRange(UMin + 1, APInt::getNullValue(W));
+ }
+ case CmpInst::ICMP_SGT: {
+ APInt SMin(CR.getSignedMin());
+ if (SMin.isMaxSignedValue())
+ return ConstantRange(W, /* empty */ false);
+ return ConstantRange(SMin + 1, APInt::getSignedMinValue(W));
+ }
+ case CmpInst::ICMP_UGE: {
APInt UMin(CR.getUnsignedMin());
if (UMin.isMinValue())
return ConstantRange(W);
return ConstantRange(UMin, APInt::getNullValue(W));
}
- case ICmpInst::ICMP_SGE: {
+ case CmpInst::ICMP_SGE: {
APInt SMin(CR.getSignedMin());
if (SMin.isMinSignedValue())
return ConstantRange(W);
// Change into [0, 1 << src bit width)
return ConstantRange(APInt(DstTySize,0), APInt(DstTySize,1).shl(SrcTySize));
- APInt L = Lower; L.zext(DstTySize);
- APInt U = Upper; U.zext(DstTySize);
- return ConstantRange(L, U);
+ return ConstantRange(Lower.zext(DstTySize), Upper.zext(DstTySize));
}
/// signExtend - Return a new range in the specified integer type, which must
APInt::getLowBitsSet(DstTySize, SrcTySize-1) + 1);
}
- APInt L = Lower; L.sext(DstTySize);
- APInt U = Upper; U.sext(DstTySize);
- return ConstantRange(L, U);
+ return ConstantRange(Lower.sext(DstTySize), Upper.sext(DstTySize));
}
/// truncate - Return a new range in the specified integer type, which must be
if (isFullSet() || getSetSize().ugt(Size))
return ConstantRange(DstTySize, /*isFullSet=*/true);
- APInt L = Lower; L.trunc(DstTySize);
- APInt U = Upper; U.trunc(DstTySize);
- return ConstantRange(L, U);
+ return ConstantRange(Lower.trunc(DstTySize), Upper.trunc(DstTySize));
}
/// zextOrTrunc - make this range have the bit width given by \p DstTySize. The
return ConstantRange(getBitWidth(), /*isFullSet=*/true);
APInt Spread_X = getSetSize(), Spread_Y = Other.getSetSize();
- APInt NewLower = getLower() - Other.getLower();
- APInt NewUpper = getUpper() - Other.getUpper() + 1;
+ APInt NewLower = getLower() - Other.getUpper() + 1;
+ APInt NewUpper = getUpper() - Other.getLower();
if (NewLower == NewUpper)
return ConstantRange(getBitWidth(), /*isFullSet=*/true);
return ConstantRange(Lower, Upper);
}
+ConstantRange
+ConstantRange::binaryAnd(const ConstantRange &Other) const {
+ if (isEmptySet() || Other.isEmptySet())
+ return ConstantRange(getBitWidth(), /*isFullSet=*/false);
+
+ // TODO: replace this with something less conservative
+
+ APInt umin = APIntOps::umin(Other.getUnsignedMax(), getUnsignedMax());
+ if (umin.isAllOnesValue())
+ return ConstantRange(getBitWidth(), /*isFullSet=*/true);
+ return ConstantRange(APInt::getNullValue(getBitWidth()), umin + 1);
+}
+
+ConstantRange
+ConstantRange::binaryOr(const ConstantRange &Other) const {
+ if (isEmptySet() || Other.isEmptySet())
+ return ConstantRange(getBitWidth(), /*isFullSet=*/false);
+
+ // TODO: replace this with something less conservative
+
+ APInt umax = APIntOps::umax(getUnsignedMin(), Other.getUnsignedMin());
+ if (umax.isMinValue())
+ return ConstantRange(getBitWidth(), /*isFullSet=*/true);
+ return ConstantRange(umax, APInt::getNullValue(getBitWidth()));
+}
+
ConstantRange
ConstantRange::shl(const ConstantRange &Other) const {
if (isEmptySet() || Other.isEmptySet())