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Add getter methods for the extremes of a ConstantRange.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35056 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2007-03-10 15:54:12 +00:00
parent c1fb0473ed
commit 3400e6af6b
2 changed files with 84 additions and 0 deletions
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20
include/llvm/Support/ConstantRange.h
View File

@ -102,6 +102,26 @@ class ConstantRange {
///
APInt getSetSize() const;
/// getUnsignedMax - Return the largest unsigned value contained in the
/// ConstantRange.
///
APInt getUnsignedMax() const;
/// getUnsignedMin - Return the smallest unsigned value contained in the
/// ConstantRange.
///
APInt getUnsignedMin() const;
/// getSignedMax - Return the largest signed value contained in the
/// ConstantRange.
///
APInt getSignedMax() const;
/// getSignedMin - Return the smallest signed value contained in the
/// ConstantRange.
///
APInt getSignedMin() const;
/// operator== - Return true if this range is equal to another range.
///
bool operator==(const ConstantRange &CR) const {

64
lib/Support/ConstantRange.cpp
View File

@ -84,6 +84,70 @@ APInt ConstantRange::getSetSize() const {
return Upper - Lower;
}
/// getUnsignedMax - Return the largest unsigned value contained in the
/// ConstantRange.
///
APInt ConstantRange::getUnsignedMax() const {
if (isFullSet() || isWrappedSet())
return APInt::getMaxValue(getBitWidth());
else
return getUpper() - 1;
}
/// getUnsignedMin - Return the smallest unsigned value contained in the
/// ConstantRange.
///
APInt ConstantRange::getUnsignedMin() const {
if (isFullSet() || (isWrappedSet() && getUpper() != 0))
return APInt::getMinValue(getBitWidth());
else
return getLower();
}
/// getSignedMax - Return the largest signed value contained in the
/// ConstantRange.
///
APInt ConstantRange::getSignedMax() const {
APInt SignedMax = APInt::getSignedMaxValue(getBitWidth());
if (!isWrappedSet()) {
if (getLower().slt(getUpper() - 1))
return getUpper() - 1;
else
return SignedMax;
} else {
if ((getUpper() - 1).slt(getLower())) {
if (getLower() != SignedMax)
return SignedMax;
else
return getUpper() - 1;
} else {
return getUpper() - 1;
}
}
}
/// getSignedMin - Return the smallest signed value contained in the
/// ConstantRange.
///
APInt ConstantRange::getSignedMin() const {
APInt SignedMin = APInt::getSignedMinValue(getBitWidth());
if (!isWrappedSet()) {
if (getLower().slt(getUpper() - 1))
return getLower();
else
return SignedMin;
} else {
if ((getUpper() - 1).slt(getLower())) {
if (getUpper() != SignedMin)
return SignedMin;
else
return getLower();
} else {
return getLower();
}
}
}
/// contains - Return true if the specified value is in the set.
///
bool ConstantRange::contains(const APInt &V) const {