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[APInt] Move operator=(uint64_t) inline as its pretty simple and is often used with small constants that the compiler can optimize.

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While there recognize that we only need to clearUnusedBits on the single word case.

llvm-svn: 298881
This commit is contained in:
Craig Topper 2017-03-27 20:07:31 +00:00
parent 675af18292
commit 6146e01ab1
2 changed files with 10 additions and 11 deletions
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11
include/llvm/ADT/APInt.h
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@ -676,7 +676,16 @@ public:
/// than 64, the value is zero filled in the unspecified high order bits.
///
/// \returns *this after assignment of RHS value.
APInt &operator=(uint64_t RHS);
APInt &operator=(uint64_t RHS) {
if (isSingleWord()) {
VAL = RHS;
clearUnusedBits();
} else {
pVal[0] = RHS;
memset(pVal+1, 0, (getNumWords() - 1) * APINT_WORD_SIZE);
}
return *this;
}
/// \brief Bitwise AND assignment operator.
///

10
lib/Support/APInt.cpp
View File

@ -157,16 +157,6 @@ APInt& APInt::AssignSlowCase(const APInt& RHS) {
return clearUnusedBits();
}
APInt& APInt::operator=(uint64_t RHS) {
if (isSingleWord())
VAL = RHS;
else {
pVal[0] = RHS;
memset(pVal+1, 0, (getNumWords() - 1) * APINT_WORD_SIZE);
}
return clearUnusedBits();
}
/// This method 'profiles' an APInt for use with FoldingSet.
void APInt::Profile(FoldingSetNodeID& ID) const {
ID.AddInteger(BitWidth);