From bbf1db72133e9cf986e4da6260736335533067db Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Thu, 7 May 2009 05:42:24 +0000
Subject: [PATCH] Rename "loop aligner" pass to "code placement optimization"
 pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71150 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/Passes.h                 |  6 ++---
 lib/CodeGen/CMakeLists.txt                    |  2 +-
 .../{LoopAligner.cpp => CodePlacementOpt.cpp} | 24 +++++++++++--------
 lib/CodeGen/LLVMTargetMachine.cpp             |  2 +-
 4 files changed, 19 insertions(+), 15 deletions(-)
 rename lib/CodeGen/{LoopAligner.cpp => CodePlacementOpt.cpp} (75%)

diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h
index faf98319525..ff80dbacd61 100644
--- a/include/llvm/CodeGen/Passes.h
+++ b/include/llvm/CodeGen/Passes.h
@@ -146,9 +146,9 @@ namespace llvm {
   /// IfConverter Pass - This pass performs machine code if conversion.
   FunctionPass *createIfConverterPass();
 
-  /// LoopAligner Pass - This pass aligns loop headers to target specific
-  /// alignment boundary.
-  FunctionPass *createLoopAlignerPass();
+  /// Code Placement Pass - This pass optimize code placement and aligns loop
+  /// headers to target specific alignment boundary.
+  FunctionPass *createCodePlacementOptPass();
 
   /// DebugLabelFoldingPass - This pass prunes out redundant debug labels.  This
   /// allows a debug emitter to determine if the range of two labels is empty,
diff --git a/lib/CodeGen/CMakeLists.txt b/lib/CodeGen/CMakeLists.txt
index bf8c153a32e..2cae80f321d 100644
--- a/lib/CodeGen/CMakeLists.txt
+++ b/lib/CodeGen/CMakeLists.txt
@@ -1,5 +1,6 @@
 add_llvm_library(LLVMCodeGen
   BranchFolding.cpp
+  CodePlacementOpt.cpp
   DeadMachineInstructionElim.cpp
   ELFWriter.cpp
   GCMetadata.cpp
@@ -13,7 +14,6 @@ add_llvm_library(LLVMCodeGen
   LiveIntervalAnalysis.cpp
   LiveStackAnalysis.cpp
   LiveVariables.cpp
-  LoopAligner.cpp
   LowerSubregs.cpp
   MachOWriter.cpp
   MachineBasicBlock.cpp
diff --git a/lib/CodeGen/LoopAligner.cpp b/lib/CodeGen/CodePlacementOpt.cpp
similarity index 75%
rename from lib/CodeGen/LoopAligner.cpp
rename to lib/CodeGen/CodePlacementOpt.cpp
index b67f5c3bf91..54121afefda 100644
--- a/lib/CodeGen/LoopAligner.cpp
+++ b/lib/CodeGen/CodePlacementOpt.cpp
@@ -1,4 +1,4 @@
-//===-- LoopAligner.cpp - Loop aligner pass. ------------------------------===//
+//===-- CodePlacementOpt.cpp - Code Placement pass. -----------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,12 +7,12 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file implements the pass that align loop headers to target specific
-// alignment boundary.
+// This file implements the pass that optimize code placement and align loop
+// headers to target specific alignment boundary.
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "loopalign"
+#define DEBUG_TYPE "code-placement"
 #include "llvm/CodeGen/MachineLoopInfo.h"
 #include "llvm/CodeGen/MachineFunctionPass.h"
 #include "llvm/CodeGen/Passes.h"
@@ -23,13 +23,15 @@
 using namespace llvm;
 
 namespace {
-  class LoopAligner : public MachineFunctionPass {
+  class CodePlacementOpt : public MachineFunctionPass {
   public:
     static char ID;
-    LoopAligner() : MachineFunctionPass(&ID) {}
+    CodePlacementOpt() : MachineFunctionPass(&ID) {}
 
     virtual bool runOnMachineFunction(MachineFunction &MF);
-    virtual const char *getPassName() const { return "Loop aligner"; }
+    virtual const char *getPassName() const {
+      return "Code Placement Optimizater";
+    }
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
       AU.addRequired<MachineLoopInfo>();
@@ -39,12 +41,14 @@ namespace {
     }
   };
 
-  char LoopAligner::ID = 0;
+  char CodePlacementOpt::ID = 0;
 } // end anonymous namespace
 
-FunctionPass *llvm::createLoopAlignerPass() { return new LoopAligner(); }
+FunctionPass *llvm::createCodePlacementOptPass() {
+  return new CodePlacementOpt();
+}
 
-bool LoopAligner::runOnMachineFunction(MachineFunction &MF) {
+bool CodePlacementOpt::runOnMachineFunction(MachineFunction &MF) {
   const MachineLoopInfo *MLI = &getAnalysis<MachineLoopInfo>();
 
   if (MLI->empty())
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index b4a0bc2b7ae..c93ecdab476 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -70,7 +70,7 @@ LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
     PM.add(createMachineFunctionPrinterPass(cerr));
 
   if (OptLevel != CodeGenOpt::None)
-    PM.add(createLoopAlignerPass());
+    PM.add(createCodePlacementOptPass());
 
   switch (FileType) {
   default:
-- 
2.34.1