Move some constant folding functions into LLVMAnalysis since they are used

by Analysis and Transformation passes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24038 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/ConstantFolding.h

@@ -0,0 +1,36 @@
+//===-- ConstantFolding.h - Analyze constant folding possibilities --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This family of functions determines the possibility of performing constant
+// folding.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Constants.h"
+#include "llvm/Function.h"
+using namespace llvm;
+
+namespace llvm {
+
+/// canConstantFoldCallTo - Return true if its even possible to fold a call to
+/// the specified function.
+extern
+bool canConstantFoldCallTo(Function *F);
+
+/// ConstantFoldFP - Given a function that evaluates the constant, return an
+///                  LLVM Constant that represents the evaluated constant
+extern Constant *
+ConstantFoldFP(double (*NativeFP)(double), double V, const Type *Ty);
+
+/// ConstantFoldCall - Attempt to constant fold a call to the specified function
+/// with the specified arguments, returning null if unsuccessful.
+extern Constant *
+ConstantFoldCall(Function *F, const std::vector<Constant*> &Operands);
+}
+