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Add operator== to APSInt. This will compare the signed bit before doing 

the comparison.  This prevents large unsigned integers from being equal to
signed negative integers of the same bit width.

llvm-svn: 160642
This commit is contained in:
Richard Trieu 2012-07-23 20:24:23 +00:00
parent c320c745cc
commit 1feac1cef9
1 changed files with 20 additions and 1 deletions
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21
llvm/include/llvm/ADT/APSInt.h
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@ -135,6 +135,19 @@ public:
assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
return IsUnsigned ? uge(RHS) : sge(RHS);
}
inline bool operator==(const APSInt& RHS) const {
assert(IsUnsigned == RHS.IsUnsigned && "Signedness mismatch!");
return eq(RHS);
}
inline bool operator==(int64_t RHS) const {
return isSameValue(*this, APSInt(APInt(64, RHS), true));
}
inline bool operator!=(const APSInt& RHS) const {
return !((*this) == RHS);
}
inline bool operator!=(int64_t RHS) const {
return !((*this) == RHS);
}
// The remaining operators just wrap the logic of APInt, but retain the
// signedness information.
@ -282,12 +295,18 @@ public:
void Profile(FoldingSetNodeID& ID) const;
};
inline bool operator==(int64_t V1, const APSInt& V2) {
return V2 == V1;
}
inline bool operator!=(int64_t V1, const APSInt& V2) {
return V2 != V1;
}
inline raw_ostream &operator<<(raw_ostream &OS, const APSInt &I) {
I.print(OS, I.isSigned());
return OS;
}
} // end namespace llvm
#endif