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Add some new methods

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12539 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-03-30 00:20:08 +00:00
parent eb8863db90
commit fc33d30446
4 changed files with 286 additions and 45 deletions
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25
include/llvm/Support/ConstantRange.h
View File

@ -30,6 +30,7 @@
namespace llvm {
class Constant;
class ConstantIntegral;
class ConstantInt;
class Type;
class ConstantRange {
@ -39,6 +40,10 @@ class ConstantRange {
///
ConstantRange(const Type *Ty, bool isFullSet = true);
/// Initialize a range to hold the single specified value.
///
ConstantRange(Constant *Value);
/// Initialize a range of values explicitly... this will assert out if
/// Lower==Upper and Lower != Min or Max for its type, if the two constants
/// have different types, or if the constant are not integral values.
@ -74,6 +79,10 @@ class ConstantRange {
/// for example: [100, 8)
///
bool isWrappedSet() const;
/// contains - Return true if the specified value is in the set.
///
bool contains(ConstantInt *Val) const;
/// getSingleElement - If this set contains a single element, return it,
/// otherwise return null.
@ -97,6 +106,10 @@ class ConstantRange {
return !operator==(CR);
}
/// subtract - Subtract the specified constant from the endpoints of this
/// constant range.
ConstantRange subtract(ConstantInt *CI) const;
/// intersect - Return the range that results from the intersection of this
/// range with another range. The resultant range is pruned as much as
/// possible, but there may be cases where elements are included that are in
@ -113,6 +126,18 @@ class ConstantRange {
///
ConstantRange unionWith(const ConstantRange &CR) const;
/// zeroExtend - Return a new range in the specified integer type, which must
/// be strictly larger than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// zero extended.
ConstantRange zeroExtend(const Type *Ty) const;
/// truncate - Return a new range in the specified integer type, which must be
/// strictly smaller than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// truncated to the specified type.
ConstantRange truncate(const Type *Ty) const;
/// print - Print out the bounds to a stream...
///
void print(std::ostream &OS) const;

102
lib/Analysis/ConstantRange.cpp
View File

@ -27,18 +27,29 @@
#include "llvm/Type.h"
using namespace llvm;
static ConstantIntegral *Next(ConstantIntegral *CI) {
if (CI->getType() == Type::BoolTy)
return CI == ConstantBool::True ? ConstantBool::False : ConstantBool::True;
Constant *Result = ConstantExpr::getAdd(CI,
ConstantInt::get(CI->getType(), 1));
return cast<ConstantIntegral>(Result);
}
static bool LT(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::get(Instruction::SetLT, A, B);
Constant *C = ConstantExpr::getSetLT(A, B);
assert(isa<ConstantBool>(C) && "Constant folding of integrals not impl??");
return cast<ConstantBool>(C)->getValue();
}
static bool GT(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::get(Instruction::SetGT, A, B);
static bool LTE(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::getSetLE(A, B);
assert(isa<ConstantBool>(C) && "Constant folding of integrals not impl??");
return cast<ConstantBool>(C)->getValue();
}
static bool GT(ConstantIntegral *A, ConstantIntegral *B) { return LT(B, A); }
static ConstantIntegral *Min(ConstantIntegral *A, ConstantIntegral *B) {
return LT(A, B) ? A : B;
}
@ -46,7 +57,6 @@ static ConstantIntegral *Max(ConstantIntegral *A, ConstantIntegral *B) {
return GT(A, B) ? A : B;
}
/// Initialize a full (the default) or empty set for the specified type.
///
ConstantRange::ConstantRange(const Type *Ty, bool Full) {
@ -58,6 +68,12 @@ ConstantRange::ConstantRange(const Type *Ty, bool Full) {
Lower = Upper = ConstantIntegral::getMinValue(Ty);
}
/// Initialize a range to hold the single specified value.
///
ConstantRange::ConstantRange(Constant *V)
: Lower(cast<ConstantIntegral>(V)), Upper(Next(cast<ConstantIntegral>(V))) {
}
/// Initialize a range of values explicitly... this will assert out if
/// Lower==Upper and Lower != Min or Max for its type (or if the two constants
/// have different types)
@ -73,15 +89,6 @@ ConstantRange::ConstantRange(Constant *L, Constant *U)
"Lower == Upper, but they aren't min or max for type!");
}
static ConstantIntegral *Next(ConstantIntegral *CI) {
if (CI->getType() == Type::BoolTy)
return CI == ConstantBool::True ? ConstantBool::False : ConstantBool::True;
Constant *Result = ConstantExpr::get(Instruction::Add, CI,
ConstantInt::get(CI->getType(), 1));
return cast<ConstantIntegral>(Result);
}
/// Initialize a set of values that all satisfy the condition with C.
///
ConstantRange::ConstantRange(unsigned SetCCOpcode, ConstantIntegral *C) {
@ -151,12 +158,35 @@ uint64_t ConstantRange::getSetSize() const {
}
// Simply subtract the bounds...
Constant *Result =
ConstantExpr::get(Instruction::Sub, (Constant*)Upper, (Constant*)Lower);
Constant *Result = ConstantExpr::getSub(Upper, Lower);
return cast<ConstantInt>(Result)->getRawValue();
}
/// contains - Return true if the specified value is in the set.
///
bool ConstantRange::contains(ConstantInt *Val) const {
if (Lower == Upper) {
if (isFullSet()) return true;
return false;
}
if (!isWrappedSet())
return LTE(Lower, Val) && LT(Val, Upper);
return LTE(Lower, Val) || LT(Val, Upper);
}
/// subtract - Subtract the specified constant from the endpoints of this
/// constant range.
ConstantRange ConstantRange::subtract(ConstantInt *CI) const {
assert(CI->getType() == getType() && getType()->isInteger() &&
"Cannot subtract from different type range or non-integer!");
// If the set is empty or full, don't modify the endpoints.
if (Lower == Upper) return *this;
return ConstantRange(ConstantExpr::getSub(Lower, CI),
ConstantExpr::getSub(Upper, CI));
}
// intersect1Wrapped - This helper function is used to intersect two ranges when
@ -245,6 +275,48 @@ ConstantRange ConstantRange::unionWith(const ConstantRange &CR) const {
return *this;
}
/// zeroExtend - Return a new range in the specified integer type, which must
/// be strictly larger than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// zero extended.
ConstantRange ConstantRange::zeroExtend(const Type *Ty) const {
assert(getLower()->getType()->getPrimitiveSize() < Ty->getPrimitiveSize() &&
"Not a value extension");
if (isFullSet()) {
// Change a source full set into [0, 1 << 8*numbytes)
unsigned SrcTySize = getLower()->getType()->getPrimitiveSize();
return ConstantRange(Constant::getNullValue(Ty),
ConstantUInt::get(Ty, 1ULL << SrcTySize*8));
}
Constant *Lower = getLower();
Constant *Upper = getUpper();
if (Lower->getType()->isInteger() && !Lower->getType()->isUnsigned()) {
// Ensure we are doing a ZERO extension even if the input range is signed.
Lower = ConstantExpr::getCast(Lower, Ty->getUnsignedVersion());
Upper = ConstantExpr::getCast(Upper, Ty->getUnsignedVersion());
}
return ConstantRange(ConstantExpr::getCast(Lower, Ty),
ConstantExpr::getCast(Upper, Ty));
}
/// truncate - Return a new range in the specified integer type, which must be
/// strictly smaller than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// truncated to the specified type.
ConstantRange ConstantRange::truncate(const Type *Ty) const {
assert(getLower()->getType()->getPrimitiveSize() > Ty->getPrimitiveSize() &&
"Not a value truncation");
uint64_t Size = 1ULL << Ty->getPrimitiveSize()*8;
if (isFullSet() || getSetSize() >= Size)
return ConstantRange(getType());
return ConstantRange(ConstantExpr::getCast(getLower(), Ty),
ConstantExpr::getCast(getUpper(), Ty));
}
/// print - Print out the bounds to a stream...
///
void ConstantRange::print(std::ostream &OS) const {

102
lib/Support/ConstantRange.cpp
View File

@ -27,18 +27,29 @@
#include "llvm/Type.h"
using namespace llvm;
static ConstantIntegral *Next(ConstantIntegral *CI) {
if (CI->getType() == Type::BoolTy)
return CI == ConstantBool::True ? ConstantBool::False : ConstantBool::True;
Constant *Result = ConstantExpr::getAdd(CI,
ConstantInt::get(CI->getType(), 1));
return cast<ConstantIntegral>(Result);
}
static bool LT(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::get(Instruction::SetLT, A, B);
Constant *C = ConstantExpr::getSetLT(A, B);
assert(isa<ConstantBool>(C) && "Constant folding of integrals not impl??");
return cast<ConstantBool>(C)->getValue();
}
static bool GT(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::get(Instruction::SetGT, A, B);
static bool LTE(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::getSetLE(A, B);
assert(isa<ConstantBool>(C) && "Constant folding of integrals not impl??");
return cast<ConstantBool>(C)->getValue();
}
static bool GT(ConstantIntegral *A, ConstantIntegral *B) { return LT(B, A); }
static ConstantIntegral *Min(ConstantIntegral *A, ConstantIntegral *B) {
return LT(A, B) ? A : B;
}
@ -46,7 +57,6 @@ static ConstantIntegral *Max(ConstantIntegral *A, ConstantIntegral *B) {
return GT(A, B) ? A : B;
}
/// Initialize a full (the default) or empty set for the specified type.
///
ConstantRange::ConstantRange(const Type *Ty, bool Full) {
@ -58,6 +68,12 @@ ConstantRange::ConstantRange(const Type *Ty, bool Full) {
Lower = Upper = ConstantIntegral::getMinValue(Ty);
}
/// Initialize a range to hold the single specified value.
///
ConstantRange::ConstantRange(Constant *V)
: Lower(cast<ConstantIntegral>(V)), Upper(Next(cast<ConstantIntegral>(V))) {
}
/// Initialize a range of values explicitly... this will assert out if
/// Lower==Upper and Lower != Min or Max for its type (or if the two constants
/// have different types)
@ -73,15 +89,6 @@ ConstantRange::ConstantRange(Constant *L, Constant *U)
"Lower == Upper, but they aren't min or max for type!");
}
static ConstantIntegral *Next(ConstantIntegral *CI) {
if (CI->getType() == Type::BoolTy)
return CI == ConstantBool::True ? ConstantBool::False : ConstantBool::True;
Constant *Result = ConstantExpr::get(Instruction::Add, CI,
ConstantInt::get(CI->getType(), 1));
return cast<ConstantIntegral>(Result);
}
/// Initialize a set of values that all satisfy the condition with C.
///
ConstantRange::ConstantRange(unsigned SetCCOpcode, ConstantIntegral *C) {
@ -151,12 +158,35 @@ uint64_t ConstantRange::getSetSize() const {
}
// Simply subtract the bounds...
Constant *Result =
ConstantExpr::get(Instruction::Sub, (Constant*)Upper, (Constant*)Lower);
Constant *Result = ConstantExpr::getSub(Upper, Lower);
return cast<ConstantInt>(Result)->getRawValue();
}
/// contains - Return true if the specified value is in the set.
///
bool ConstantRange::contains(ConstantInt *Val) const {
if (Lower == Upper) {
if (isFullSet()) return true;
return false;
}
if (!isWrappedSet())
return LTE(Lower, Val) && LT(Val, Upper);
return LTE(Lower, Val) || LT(Val, Upper);
}
/// subtract - Subtract the specified constant from the endpoints of this
/// constant range.
ConstantRange ConstantRange::subtract(ConstantInt *CI) const {
assert(CI->getType() == getType() && getType()->isInteger() &&
"Cannot subtract from different type range or non-integer!");
// If the set is empty or full, don't modify the endpoints.
if (Lower == Upper) return *this;
return ConstantRange(ConstantExpr::getSub(Lower, CI),
ConstantExpr::getSub(Upper, CI));
}
// intersect1Wrapped - This helper function is used to intersect two ranges when
@ -245,6 +275,48 @@ ConstantRange ConstantRange::unionWith(const ConstantRange &CR) const {
return *this;
}
/// zeroExtend - Return a new range in the specified integer type, which must
/// be strictly larger than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// zero extended.
ConstantRange ConstantRange::zeroExtend(const Type *Ty) const {
assert(getLower()->getType()->getPrimitiveSize() < Ty->getPrimitiveSize() &&
"Not a value extension");
if (isFullSet()) {
// Change a source full set into [0, 1 << 8*numbytes)
unsigned SrcTySize = getLower()->getType()->getPrimitiveSize();
return ConstantRange(Constant::getNullValue(Ty),
ConstantUInt::get(Ty, 1ULL << SrcTySize*8));
}
Constant *Lower = getLower();
Constant *Upper = getUpper();
if (Lower->getType()->isInteger() && !Lower->getType()->isUnsigned()) {
// Ensure we are doing a ZERO extension even if the input range is signed.
Lower = ConstantExpr::getCast(Lower, Ty->getUnsignedVersion());
Upper = ConstantExpr::getCast(Upper, Ty->getUnsignedVersion());
}
return ConstantRange(ConstantExpr::getCast(Lower, Ty),
ConstantExpr::getCast(Upper, Ty));
}
/// truncate - Return a new range in the specified integer type, which must be
/// strictly smaller than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// truncated to the specified type.
ConstantRange ConstantRange::truncate(const Type *Ty) const {
assert(getLower()->getType()->getPrimitiveSize() > Ty->getPrimitiveSize() &&
"Not a value truncation");
uint64_t Size = 1ULL << Ty->getPrimitiveSize()*8;
if (isFullSet() || getSetSize() >= Size)
return ConstantRange(getType());
return ConstantRange(ConstantExpr::getCast(getLower(), Ty),
ConstantExpr::getCast(getUpper(), Ty));
}
/// print - Print out the bounds to a stream...
///
void ConstantRange::print(std::ostream &OS) const {

102
lib/VMCore/ConstantRange.cpp
View File

@ -27,18 +27,29 @@
#include "llvm/Type.h"
using namespace llvm;
static ConstantIntegral *Next(ConstantIntegral *CI) {
if (CI->getType() == Type::BoolTy)
return CI == ConstantBool::True ? ConstantBool::False : ConstantBool::True;
Constant *Result = ConstantExpr::getAdd(CI,
ConstantInt::get(CI->getType(), 1));
return cast<ConstantIntegral>(Result);
}
static bool LT(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::get(Instruction::SetLT, A, B);
Constant *C = ConstantExpr::getSetLT(A, B);
assert(isa<ConstantBool>(C) && "Constant folding of integrals not impl??");
return cast<ConstantBool>(C)->getValue();
}
static bool GT(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::get(Instruction::SetGT, A, B);
static bool LTE(ConstantIntegral *A, ConstantIntegral *B) {
Constant *C = ConstantExpr::getSetLE(A, B);
assert(isa<ConstantBool>(C) && "Constant folding of integrals not impl??");
return cast<ConstantBool>(C)->getValue();
}
static bool GT(ConstantIntegral *A, ConstantIntegral *B) { return LT(B, A); }
static ConstantIntegral *Min(ConstantIntegral *A, ConstantIntegral *B) {
return LT(A, B) ? A : B;
}
@ -46,7 +57,6 @@ static ConstantIntegral *Max(ConstantIntegral *A, ConstantIntegral *B) {
return GT(A, B) ? A : B;
}
/// Initialize a full (the default) or empty set for the specified type.
///
ConstantRange::ConstantRange(const Type *Ty, bool Full) {
@ -58,6 +68,12 @@ ConstantRange::ConstantRange(const Type *Ty, bool Full) {
Lower = Upper = ConstantIntegral::getMinValue(Ty);
}
/// Initialize a range to hold the single specified value.
///
ConstantRange::ConstantRange(Constant *V)
: Lower(cast<ConstantIntegral>(V)), Upper(Next(cast<ConstantIntegral>(V))) {
}
/// Initialize a range of values explicitly... this will assert out if
/// Lower==Upper and Lower != Min or Max for its type (or if the two constants
/// have different types)
@ -73,15 +89,6 @@ ConstantRange::ConstantRange(Constant *L, Constant *U)
"Lower == Upper, but they aren't min or max for type!");
}
static ConstantIntegral *Next(ConstantIntegral *CI) {
if (CI->getType() == Type::BoolTy)
return CI == ConstantBool::True ? ConstantBool::False : ConstantBool::True;
Constant *Result = ConstantExpr::get(Instruction::Add, CI,
ConstantInt::get(CI->getType(), 1));
return cast<ConstantIntegral>(Result);
}
/// Initialize a set of values that all satisfy the condition with C.
///
ConstantRange::ConstantRange(unsigned SetCCOpcode, ConstantIntegral *C) {
@ -151,12 +158,35 @@ uint64_t ConstantRange::getSetSize() const {
}
// Simply subtract the bounds...
Constant *Result =
ConstantExpr::get(Instruction::Sub, (Constant*)Upper, (Constant*)Lower);
Constant *Result = ConstantExpr::getSub(Upper, Lower);
return cast<ConstantInt>(Result)->getRawValue();
}
/// contains - Return true if the specified value is in the set.
///
bool ConstantRange::contains(ConstantInt *Val) const {
if (Lower == Upper) {
if (isFullSet()) return true;
return false;
}
if (!isWrappedSet())
return LTE(Lower, Val) && LT(Val, Upper);
return LTE(Lower, Val) || LT(Val, Upper);
}
/// subtract - Subtract the specified constant from the endpoints of this
/// constant range.
ConstantRange ConstantRange::subtract(ConstantInt *CI) const {
assert(CI->getType() == getType() && getType()->isInteger() &&
"Cannot subtract from different type range or non-integer!");
// If the set is empty or full, don't modify the endpoints.
if (Lower == Upper) return *this;
return ConstantRange(ConstantExpr::getSub(Lower, CI),
ConstantExpr::getSub(Upper, CI));
}
// intersect1Wrapped - This helper function is used to intersect two ranges when
@ -245,6 +275,48 @@ ConstantRange ConstantRange::unionWith(const ConstantRange &CR) const {
return *this;
}
/// zeroExtend - Return a new range in the specified integer type, which must
/// be strictly larger than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// zero extended.
ConstantRange ConstantRange::zeroExtend(const Type *Ty) const {
assert(getLower()->getType()->getPrimitiveSize() < Ty->getPrimitiveSize() &&
"Not a value extension");
if (isFullSet()) {
// Change a source full set into [0, 1 << 8*numbytes)
unsigned SrcTySize = getLower()->getType()->getPrimitiveSize();
return ConstantRange(Constant::getNullValue(Ty),
ConstantUInt::get(Ty, 1ULL << SrcTySize*8));
}
Constant *Lower = getLower();
Constant *Upper = getUpper();
if (Lower->getType()->isInteger() && !Lower->getType()->isUnsigned()) {
// Ensure we are doing a ZERO extension even if the input range is signed.
Lower = ConstantExpr::getCast(Lower, Ty->getUnsignedVersion());
Upper = ConstantExpr::getCast(Upper, Ty->getUnsignedVersion());
}
return ConstantRange(ConstantExpr::getCast(Lower, Ty),
ConstantExpr::getCast(Upper, Ty));
}
/// truncate - Return a new range in the specified integer type, which must be
/// strictly smaller than the current type. The returned range will
/// correspond to the possible range of values if the source range had been
/// truncated to the specified type.
ConstantRange ConstantRange::truncate(const Type *Ty) const {
assert(getLower()->getType()->getPrimitiveSize() > Ty->getPrimitiveSize() &&
"Not a value truncation");
uint64_t Size = 1ULL << Ty->getPrimitiveSize()*8;
if (isFullSet() || getSetSize() >= Size)
return ConstantRange(getType());
return ConstantRange(ConstantExpr::getCast(getLower(), Ty),
ConstantExpr::getCast(getUpper(), Ty));
}
/// print - Print out the bounds to a stream...
///
void ConstantRange::print(std::ostream &OS) const {