Delete the IPO simplify-libcalls and completely reimplement it as

a FunctionPass.  This makes it simpler, fixes dozens of bugs, adds
a couple of minor features, and shrinks is considerably: from
2214 to 1437 lines.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50520 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Transforms/IPO.h

@@ -159,11 +159,6 @@ FunctionPass *createSingleLoopExtractorPass();
 ///
 ModulePass *createBlockExtractorPass(const std::vector<BasicBlock*> &BTNE);
 
-/// createOptimizeWellKnownCallsPass - This pass optimizes specific calls to
-/// specific well-known (library) functions.
-ModulePass *createSimplifyLibCallsPass();
-
-
 /// createIndMemRemPass - This pass removes potential indirect calls of
 /// malloc and free
 ModulePass *createIndMemRemPass();

include/llvm/Transforms/Scalar.h

@@ -323,6 +323,12 @@ FunctionPass *createMemCpyOptPass();
 // can prove are dead.
 //
 LoopPass *createLoopDeletionPass();
+  
+//===----------------------------------------------------------------------===//
+//
+/// createSimplifyLibCallsPass - This pass optimizes specific calls to
+/// specific well-known (library) functions.
+FunctionPass *createSimplifyLibCallsPass();
 
 //===----------------------------------------------------------------------===//
 //