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1. Split getValue() into getSExtValue() and getZExtValue() to match

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ConstantInt better.
2. Add a getHashValue() method.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34641 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2007-02-26 20:57:12 +00:00
parent fb688d4d1c
commit 31a81f0190
1 changed files with 25 additions and 9 deletions
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34
include/llvm/ADT/APInt.h
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@@ -447,16 +447,27 @@ public:
return BitWidth - countLeadingZeros(); return BitWidth - countLeadingZeros();
} }
/// @returns a uint64_t value from this APInt. If this APInt contains a single /// This method attempts to return the value of this APInt as a zero extended
/// word, just returns VAL, otherwise pVal[0]. /// uint64_t. The bitwidth must be <= 64 or the value must fit within a
inline uint64_t getValue(bool isSigned = false) const { /// uint64_t. Otherwise an assertion will result.
/// @brief Get zero extended value
inline uint64_t getZExtValue() const {
if (isSingleWord()) if (isSingleWord())
return isSigned ? int64_t(VAL << (64 - BitWidth)) >> return VAL;
(64 - BitWidth) : VAL; assert(getActiveBits() <= 64 && "Too many bits for uint64_t");
uint32_t n = getActiveBits(); return pVal[0];
if (n <= 64) }
return pVal[0];
assert(0 && "This APInt's bitwidth > 64"); /// This method attempts to return the value of this APInt as a sign extended
/// int64_t. The bit width must be <= 64 or the value must fit within an
/// int64_t. Otherwise an assertion will result.
/// @brief Get sign extended value
inline int64_t getSExtValue() const {
if (isSingleWord())
return int64_t(VAL << (APINT_BITS_PER_WORD - BitWidth)) >>
(APINT_BITS_PER_WORD - BitWidth);
assert(getActiveBits() <= 64 && "Too many bits for int64_t");
return int64_t(pVal[0]);
} }
/// @returns the largest value for an APInt of the specified bit-width and /// @returns the largest value for an APInt of the specified bit-width and
@@ -478,6 +489,11 @@ public:
/// @brief Get the '0' value. /// @brief Get the '0' value.
static APInt getNullValue(uint32_t numBits); static APInt getNullValue(uint32_t numBits);
/// The hash value is computed as the sum of the words and the bit width.
/// @returns A hash value computed from the sum of the APInt words.
/// @brief Get a hash value based on this APInt
uint64_t getHashValue() const;
/// This converts the APInt to a boolean valy as a test against zero. /// This converts the APInt to a boolean valy as a test against zero.
/// @brief Boolean conversion function. /// @brief Boolean conversion function.
inline bool getBoolValue() const { inline bool getBoolValue() const {