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Add a new method to ConstantFP

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11068 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-02-02 18:40:29 +00:00
parent 55d14de0cd
commit f0fd6845ee
1 changed files with 18 additions and 0 deletions
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18
include/llvm/Constants.h
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@@ -283,6 +283,24 @@ public:
return T.I == 0; return T.I == 0;
} }
/// isExactlyValue - We don't rely on operator== working on double values, as
/// it returns true for things that are clearly not equal, like -0.0 and 0.0.
/// As such, this method can be used to do an exact bit-for-bit comparison of
/// two floating point values.
bool isExactlyValue(double V) const {
union {
double V;
uint64_t I;
} T1;
T1.V = Val;
union {
double V;
uint64_t I;
} T2;
T2.V = Val;
return T1.I == T2.I;
}
/// Methods for support type inquiry through isa, cast, and dyn_cast: /// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const ConstantFP *) { return true; } static inline bool classof(const ConstantFP *) { return true; }
static bool classof(const Constant *CPV); // defined in Constants.cpp static bool classof(const Constant *CPV); // defined in Constants.cpp