From f0fd6845eee799f62ac69297c9fd7086a0156cfa Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 2 Feb 2004 18:40:29 +0000 Subject: [PATCH] Add a new method to ConstantFP git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11068 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Constants.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index 79b6322dbf9..2d6893acf09 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -283,6 +283,24 @@ public: 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: static inline bool classof(const ConstantFP *) { return true; } static bool classof(const Constant *CPV); // defined in Constants.cpp -- 2.34.1