Refactor code to share stuff

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1127 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 56 insertions, 0 deletions

diff --git a/lib/Transforms/TransformInternals.h b/lib/Transforms/TransformInternals.h
new file mode 100644
index 0000000000..e6e65efd03
--- /dev/null
+++ b/lib/Transforms/TransformInternals.h
@@ -0,0 +1,56 @@
+//===-- TransformInternals.h - Shared functions for Transforms ---*- C++ -*--=//
+//
+//  This header file declares shared functions used by the different components
+//  of the Transforms library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TRANSFORM_INTERNALS_H
+#define TRANSFORM_INTERNALS_H
+
+#include "llvm/BasicBlock.h"
+#include "llvm/Target/TargetData.h"
+#include <map>
+
+// TargetData Hack: Eventually we will have annotations given to us by the
+// backend so that we know stuff about type size and alignments.  For now
+// though, just use this, because it happens to match the model that GCC uses.
+//
+// FIXME: This should use annotations
+//
+extern const TargetData TD;
+
+// losslessCastableTypes - Return true if the types are bitwise equivalent.
+// This predicate returns true if it is possible to cast from one type to
+// another without gaining or losing precision, or altering the bits in any way.
+//
+bool losslessCastableTypes(const Type *T1, const Type *T2);
+
+
+// ReplaceInstWithValue - Replace all uses of an instruction (specified by BI)
+// with a value, then remove and delete the original instruction.
+//
+void ReplaceInstWithValue(BasicBlock::InstListType &BIL,
+                          BasicBlock::iterator &BI, Value *V);
+
+// ReplaceInstWithInst - Replace the instruction specified by BI with the
+// instruction specified by I.  The original instruction is deleted and BI is
+// updated to point to the new instruction.
+//
+void ReplaceInstWithInst(BasicBlock::InstListType &BIL,
+                         BasicBlock::iterator &BI, Instruction *I);
+
+
+// ------------- Expression Conversion ---------------------
+
+typedef map<const Value*, const Type*> ValueTypeCache;
+typedef map<const Value*, Value*>      ValueMapCache;
+
+// RetValConvertableToType - Return true if it is possible
+bool RetValConvertableToType(Value *V, const Type *Ty,
+                             ValueTypeCache &ConvertedTypes);
+
+void ConvertUsersType(Value *V, Value *NewVal, ValueMapCache &VMC);
+
+
+#endif