1 files changed, 67 insertions, 0 deletions
diff --git a/src/jit/decomposelongs.h b/src/jit/decomposelongs.h
new file mode 100644
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+++ b/src/jit/decomposelongs.h
@@ -0,0 +1,67 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+XX                                                                           XX
+XX                               DecomposeLongs                              XX
+XX                                                                           XX
+XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+*/
+
+#ifndef _DECOMPOSELONGS_H_
+#define _DECOMPOSELONGS_H_
+
+#include "compiler.h"
+
+class DecomposeLongs
+{
+public:
+    DecomposeLongs(Compiler* compiler) : m_compiler(compiler)
+    {
+    }
+
+    void PrepareForDecomposition();
+    void DecomposeBlock(BasicBlock* block);
+
+    static void DecomposeRange(Compiler* compiler, unsigned blockWeight, LIR::Range& range);
+
+private:
+    inline LIR::Range& Range() const
+    {
+        return *m_range;
+    }
+
+    // Driver functions
+    void DecomposeRangeHelper();
+    GenTree* DecomposeNode(LIR::Use& use);
+
+    // Per-node type decompose cases
+    GenTree* DecomposeLclVar(LIR::Use& use);
+    GenTree* DecomposeLclFld(LIR::Use& use);
+    GenTree* DecomposeStoreLclVar(LIR::Use& use);
+    GenTree* DecomposeCast(LIR::Use& use);
+    GenTree* DecomposeCnsLng(LIR::Use& use);
+    GenTree* DecomposeCall(LIR::Use& use);
+    GenTree* DecomposeInd(LIR::Use& use);
+    GenTree* DecomposeStoreInd(LIR::Use& use);
+    GenTree* DecomposeNot(LIR::Use& use);
+    GenTree* DecomposeNeg(LIR::Use& use);
+    GenTree* DecomposeArith(LIR::Use& use);
+    GenTree* DecomposeShift(LIR::Use& use);
+
+    // Helper functions
+    GenTree* FinalizeDecomposition(LIR::Use& use, GenTree* loResult, GenTree* hiResult);
+
+    static genTreeOps GetHiOper(genTreeOps oper);
+    static genTreeOps GetLoOper(genTreeOps oper);
+
+    // Data
+    Compiler*   m_compiler;
+    unsigned    m_blockWeight;
+    LIR::Range* m_range;
+};
+
+#endif // _DECOMPOSELONGS_H_