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Make the trunc/sext/zext methods return APInt& so that these operations

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can be chained together with other operations.

llvm-svn: 34743
This commit is contained in:
Reid Spencer 2007-02-28 17:34:32 +00:00
parent 0f2d45e42c
commit d91c898cc0
1 changed files with 8 additions and 7 deletions
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15
lib/Support/APInt.cpp
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@ -896,7 +896,7 @@ double APInt::roundToDouble(bool isSigned) const {
}
// Truncate to new width.
void APInt::trunc(uint32_t width) {
APInt &APInt::trunc(uint32_t width) {
assert(width < BitWidth && "Invalid APInt Truncate request");
assert(width >= IntegerType::MIN_INT_BITS && "Can't truncate to 0 bits");
uint32_t wordsBefore = getNumWords();
@ -915,17 +915,17 @@ void APInt::trunc(uint32_t width) {
pVal = newVal;
}
}
clearUnusedBits();
return clearUnusedBits();
}
// Sign extend to a new width.
void APInt::sext(uint32_t width) {
APInt &APInt::sext(uint32_t width) {
assert(width > BitWidth && "Invalid APInt SignExtend request");
assert(width <= IntegerType::MAX_INT_BITS && "Too many bits");
// If the sign bit isn't set, this is the same as zext.
if (!isNegative()) {
zext(width);
return;
return *this;
}
// The sign bit is set. First, get some facts
@ -944,7 +944,7 @@ void APInt::sext(uint32_t width) {
else
pVal[wordsBefore-1] |= mask;
clearUnusedBits();
return;
return *this;
}
uint64_t mask = wordBits == 0 ? 0 : ~0ULL << wordBits;
@ -961,11 +961,11 @@ void APInt::sext(uint32_t width) {
if (wordsBefore != 1)
delete [] pVal;
pVal = newVal;
clearUnusedBits();
return clearUnusedBits();
}
// Zero extend to a new width.
void APInt::zext(uint32_t width) {
APInt &APInt::zext(uint32_t width) {
assert(width > BitWidth && "Invalid APInt ZeroExtend request");
assert(width <= IntegerType::MAX_INT_BITS && "Too many bits");
uint32_t wordsBefore = getNumWords();
@ -982,6 +982,7 @@ void APInt::zext(uint32_t width) {
delete [] pVal;
pVal = newVal;
}
return *this;
}
/// Arithmetic right-shift this APInt by shiftAmt.