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Actually, for getHighBitsSet and getLowBitsSet, don't make a 0 bit size

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illegal. Instead do the 0 valued construction for the user. This is because
the caller may not know (or care to check) that the number of bits set is
zero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35315 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-03-25 00:01:47 +00:00
parent 42593e69e2
commit a1689ea60e
1 changed files with 6 additions and 2 deletions
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8
include/llvm/ADT/APInt.h
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@ -355,7 +355,9 @@ public:
/// @brief Get a value with high bits set
static APInt getHighBitsSet(uint32_t numBits, uint32_t hiBitsSet) {
assert(hiBitsSet <= numBits && "Too many bits to set!");
assert(hiBitsSet > 0 && "You must set SOME bits");
// Handle a degenerate case, to avoid shifting by word size
if (hiBitsSet == 0)
return APInt(numBits, 0);
uint32_t shiftAmt = numBits - hiBitsSet;
// For small values, return quickly
if (numBits <= APINT_BITS_PER_WORD)
@ -369,7 +371,9 @@ public:
/// @brief Get a value with low bits set
static APInt getLowBitsSet(uint32_t numBits, uint32_t loBitsSet) {
assert(loBitsSet <= numBits && "Too many bits to set!");
assert(loBitsSet > 0 && "You must set SOME bits");
// Handle a degenerate case, to avoid shifting by word size
if (loBitsSet == 0)
return APInt(numBits, 0);
uint32_t shiftAmt = numBits - loBitsSet;
// For small values, return quickly
if (numBits <= APINT_BITS_PER_WORD)