Import LLVM, at r72732.

1 files changed, 46 insertions, 0 deletions

diff --git a/include/llvm/Transforms/Utils/PromoteMemToReg.h b/include/llvm/Transforms/Utils/PromoteMemToReg.h
new file mode 100644
index 0000000..35cfadd
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+++ b/include/llvm/Transforms/Utils/PromoteMemToReg.h
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+//===- PromoteMemToReg.h - Promote Allocas to Scalars -----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file exposes an interface to promote alloca instructions to SSA
+// registers, by using the SSA construction algorithm.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
+#define TRANSFORMS_UTILS_PROMOTEMEMTOREG_H
+
+#include <vector>
+
+namespace llvm {
+
+class AllocaInst;
+class DominatorTree;
+class DominanceFrontier;
+class AliasSetTracker;
+
+/// isAllocaPromotable - Return true if this alloca is legal for promotion.
+/// This is true if there are only loads and stores to the alloca...
+///
+bool isAllocaPromotable(const AllocaInst *AI);
+
+/// PromoteMemToReg - Promote the specified list of alloca instructions into
+/// scalar registers, inserting PHI nodes as appropriate.  This function makes
+/// use of DominanceFrontier information.  This function does not modify the CFG
+/// of the function at all.  All allocas must be from the same function.
+///
+/// If AST is specified, the specified tracker is updated to reflect changes
+/// made to the IR.
+///
+void PromoteMemToReg(const std::vector<AllocaInst*> &Allocas,
+                     DominatorTree &DT, DominanceFrontier &DF,
+                     AliasSetTracker *AST = 0);
+
+} // End llvm namespace
+
+#endif