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author | Nick Lewycky <nicholas@mxc.ca> | 2007-03-10 15:54:12 +0000 |
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committer | Nick Lewycky <nicholas@mxc.ca> | 2007-03-10 15:54:12 +0000 |
commit | 3400e6af6b10acea219c02ac262637220f84218f (patch) | |
tree | 090875112f02363816a052d2cec508b0d4960c8a /lib/Support | |
parent | c1fb0473ed415824bf6ffdbd8d6e3c4a31db3d62 (diff) | |
download | llvm-3400e6af6b10acea219c02ac262637220f84218f.tar.gz llvm-3400e6af6b10acea219c02ac262637220f84218f.tar.bz2 llvm-3400e6af6b10acea219c02ac262637220f84218f.tar.xz |
Add getter methods for the extremes of a ConstantRange.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35056 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support')
-rw-r--r-- | lib/Support/ConstantRange.cpp | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/Support/ConstantRange.cpp b/lib/Support/ConstantRange.cpp index 410c351890..becb8b61f7 100644 --- a/lib/Support/ConstantRange.cpp +++ b/lib/Support/ConstantRange.cpp @@ -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 { |