[PPCLoopDataPrefetch] Move pass to Transforms/Scalar/LoopDataPrefetch. NFC

This patch is part of the work to make PPCLoopDataPrefetch
target-independent
(http://thread.gmane.org/gmane.comp.compilers.llvm.devel/92758).

Obviously the pass still only used from PPC at this point.  Subsequent
patches will start driving this from ARM64 as well.

Due to the previous patch most lines should show up as moved lines.

llvm-svn: 261265

llvm/include/llvm/Transforms/Scalar.h

@@ -498,6 +498,12 @@ Pass *createLoopSimplifyCFGPass();
 //
 FunctionPass *createLoopVersioningPass();
 
+//===----------------------------------------------------------------------===//
+//
+// LoopDataPrefetch - Perform data prefetching in loops.
+//
+FunctionPass *createLoopDataPrefetchPass();
+
 } // End llvm namespace
 
 #endif

llvm/lib/Target/PowerPC/CMakeLists.txt

@@ -24,7 +24,6 @@ add_llvm_target(PowerPCCodeGen
   PPCEarlyReturn.cpp
   PPCFastISel.cpp
   PPCFrameLowering.cpp
-  PPCLoopDataPrefetch.cpp
   PPCLoopPreIncPrep.cpp
   PPCMCInstLower.cpp
   PPCMachineFunctionInfo.cpp

llvm/lib/Target/PowerPC/PPC.h

@@ -34,7 +34,6 @@ namespace llvm {
 #ifndef NDEBUG
   FunctionPass *createPPCCTRLoopsVerify();
 #endif
-  FunctionPass *createPPCLoopDataPrefetchPass();
   FunctionPass *createPPCLoopPreIncPrepPass(PPCTargetMachine &TM);
   FunctionPass *createPPCTOCRegDepsPass();
   FunctionPass *createPPCEarlyReturnPass();

llvm/lib/Target/PowerPC/PPCTargetMachine.cpp

@@ -313,7 +313,7 @@ void PPCPassConfig::addIRPasses() {
   if (EnablePrefetch.getNumOccurrences() > 0)
     UsePrefetching = EnablePrefetch;
   if (UsePrefetching)
-    addPass(createPPCLoopDataPrefetchPass());
+    addPass(createLoopDataPrefetchPass());
 
   if (TM->getOptLevel() == CodeGenOpt::Aggressive && EnableGEPOpt) {
     // Call SeparateConstOffsetFromGEP pass to extract constants within indices

llvm/lib/Transforms/Scalar/CMakeLists.txt

@@ -17,6 +17,7 @@ add_llvm_library(LLVMScalarOpts
   LICM.cpp
   LoadCombine.cpp
   LoopDeletion.cpp
+  LoopDataPrefetch.cpp
   LoopDistribute.cpp
   LoopIdiomRecognize.cpp
   LoopInstSimplify.cpp

llvm/lib/Transforms/Scalar/LoopDataPrefetch.cpp

@@ -1,4 +1,4 @@
-//===-------- PPCLoopDataPrefetch.cpp - Loop Data Prefetching Pass --------===//
+//===-------- LoopDataPrefetch.cpp - Loop Data Prefetching Pass -----------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -12,7 +12,6 @@
 //===----------------------------------------------------------------------===//
 
 #define DEBUG_TYPE "loop-data-prefetch"
-#include "PPC.h"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/ADT/DepthFirstIterator.h"
 #include "llvm/ADT/Statistic.h"
@@ -91,7 +90,7 @@ INITIALIZE_PASS_DEPENDENCY(ScalarEvolutionWrapperPass)
 INITIALIZE_PASS_END(LoopDataPrefetch, "loop-data-prefetch",
                     "Loop Data Prefetch", false, false)
 
-FunctionPass *llvm::createPPCLoopDataPrefetchPass() { return new LoopDataPrefetch(); }
+FunctionPass *llvm::createLoopDataPrefetchPass() { return new LoopDataPrefetch(); }
 
 bool LoopDataPrefetch::runOnFunction(Function &F) {
   LI = &getAnalysis<LoopInfoWrapperPass>().getLoopInfo();