[CodeGenPrepare] Move CodeGenPrepare into lib/CodeGen.

CodeGenPrepare uses extensively TargetLowering which is part of libLLVMCodeGen.
This is a layer violation which would introduce eventually a dependence on
CodeGen in ScalarOpts.

Move CodeGenPrepare into libLLVMCodeGen to avoid that.

Follow-up of <rdar://problem/15519855>

llvm-svn: 201912

14 files changed, 17 insertions, 13 deletions

diff --git a/llvm/include/llvm/CodeGen/Passes.h b/llvm/include/llvm/CodeGen/Passes.h
index 3be21e02421..5d68f8637b7 100644
--- a/llvm/include/llvm/CodeGen/Passes.h
+++ b/llvm/include/llvm/CodeGen/Passes.h
@@ -370,6 +370,10 @@ namespace llvm {
   createMachineFunctionPrinterPass(raw_ostream &OS,
                                    const std::string &Banner ="");
 
+  /// createCodeGenPreparePass - Transform the code to expose more pattern
+  /// matching during instruction selection.
+  FunctionPass *createCodeGenPreparePass(const TargetMachine *TM = 0);
+
   /// MachineLoopInfo - This pass is a loop analysis pass.
   extern char &MachineLoopInfoID;
 
diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
index e1890f68038..cacd4cb51b6 100644
--- a/llvm/include/llvm/Transforms/Scalar.h
+++ b/llvm/include/llvm/Transforms/Scalar.h
@@ -318,12 +318,6 @@ FunctionPass *createConstantHoistingPass();
 
 //===----------------------------------------------------------------------===//
 //
-// CodeGenPrepare - This pass prepares a function for instruction selection.
-//
-FunctionPass *createCodeGenPreparePass(const TargetMachine *TM = 0);
-
-//===----------------------------------------------------------------------===//
-//
 // InstructionNamer - Give any unnamed non-void instructions "tmp" names.
 //
 FunctionPass *createInstructionNamerPass();
diff --git a/llvm/lib/CodeGen/CMakeLists.txt b/llvm/lib/CodeGen/CMakeLists.txt
index 123d86f9504..8943cb11c6b 100644
--- a/llvm/lib/CodeGen/CMakeLists.txt
+++ b/llvm/lib/CodeGen/CMakeLists.txt
@@ -7,6 +7,7 @@ add_llvm_library(LLVMCodeGen
   CalcSpillWeights.cpp
   CallingConvLower.cpp
   CodeGen.cpp
+  CodeGenPrepare.cpp
   CriticalAntiDepBreaker.cpp
   DFAPacketizer.cpp
   DeadMachineInstructionElim.cpp
diff --git a/llvm/lib/CodeGen/CodeGen.cpp b/llvm/lib/CodeGen/CodeGen.cpp
index c0db5a54b87..17402f066da 100644
--- a/llvm/lib/CodeGen/CodeGen.cpp
+++ b/llvm/lib/CodeGen/CodeGen.cpp
@@ -22,6 +22,7 @@ using namespace llvm;
 void llvm::initializeCodeGen(PassRegistry &Registry) {
   initializeBasicTTIPass(Registry);
   initializeBranchFolderPassPass(Registry);
+  initializeCodeGenPreparePass(Registry);
   initializeDeadMachineInstructionElimPass(Registry);
   initializeEarlyIfConverterPass(Registry);
   initializeExpandPostRAPass(Registry);
diff --git a/llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 3c9ecce8e3e..e81a9098ef5 100644
--- a/llvm/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -14,7 +14,7 @@
 //===----------------------------------------------------------------------===//
 
 #define DEBUG_TYPE "codegenprepare"
-#include "llvm/Transforms/Scalar.h"
+#include "llvm/CodeGen/Passes.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/Statistic.h"
diff --git a/llvm/lib/Transforms/Scalar/CMakeLists.txt b/llvm/lib/Transforms/Scalar/CMakeLists.txt
index 8a29b0c48cb..27434c1808a 100644
--- a/llvm/lib/Transforms/Scalar/CMakeLists.txt
+++ b/llvm/lib/Transforms/Scalar/CMakeLists.txt
@@ -1,6 +1,5 @@
 add_llvm_library(LLVMScalarOpts
   ADCE.cpp
-  CodeGenPrepare.cpp
   ConstantHoisting.cpp
   ConstantProp.cpp
   CorrelatedValuePropagation.cpp
diff --git a/llvm/lib/Transforms/Scalar/Scalar.cpp b/llvm/lib/Transforms/Scalar/Scalar.cpp
index f774874cb47..e950ebacd84 100644
--- a/llvm/lib/Transforms/Scalar/Scalar.cpp
+++ b/llvm/lib/Transforms/Scalar/Scalar.cpp
@@ -29,7 +29,6 @@ using namespace llvm;
 void llvm::initializeScalarOpts(PassRegistry &Registry) {
   initializeADCEPass(Registry);
   initializeSampleProfileLoaderPass(Registry);
-  initializeCodeGenPreparePass(Registry);
   initializeConstantHoistingPass(Registry);
   initializeConstantPropagationPass(Registry);
   initializeCorrelatedValuePropagationPass(Registry);
diff --git a/llvm/tools/bugpoint/CMakeLists.txt b/llvm/tools/bugpoint/CMakeLists.txt
index 14f5a3b004b..b537a5d237d 100644
--- a/llvm/tools/bugpoint/CMakeLists.txt
+++ b/llvm/tools/bugpoint/CMakeLists.txt
@@ -1,6 +1,7 @@
 set(LLVM_LINK_COMPONENTS
   Analysis
   BitWriter
+  CodeGen
   Core
   IPA
   IPO
diff --git a/llvm/tools/bugpoint/LLVMBuild.txt b/llvm/tools/bugpoint/LLVMBuild.txt
index 01643553c5b..dda8d624fc7 100644
--- a/llvm/tools/bugpoint/LLVMBuild.txt
+++ b/llvm/tools/bugpoint/LLVMBuild.txt
@@ -19,4 +19,4 @@
 type = Tool
 name = bugpoint
 parent = Tools
-required_libraries = AsmParser BitReader BitWriter IRReader IPO Instrumentation Linker Scalar ObjCARC
+required_libraries = AsmParser BitReader BitWriter CodeGen IRReader IPO Instrumentation Linker Scalar ObjCARC
diff --git a/llvm/tools/bugpoint/Makefile b/llvm/tools/bugpoint/Makefile
index 96c0fcf519e..174f8d25161 100644
--- a/llvm/tools/bugpoint/Makefile
+++ b/llvm/tools/bugpoint/Makefile
@@ -10,7 +10,7 @@
 LEVEL := ../..
 TOOLNAME := bugpoint
 LINK_COMPONENTS := asmparser instrumentation scalaropts ipo linker bitreader \
-                   bitwriter irreader vectorize objcarcopts
+                   bitwriter irreader vectorize objcarcopts codegen
 
 # Support plugins.
 NO_DEAD_STRIP := 1
diff --git a/llvm/tools/opt/CMakeLists.txt b/llvm/tools/opt/CMakeLists.txt
index 953815be366..1f76ab55511 100644
--- a/llvm/tools/opt/CMakeLists.txt
+++ b/llvm/tools/opt/CMakeLists.txt
@@ -2,6 +2,7 @@ set(LLVM_LINK_COMPONENTS
   ${LLVM_TARGETS_TO_BUILD}
   Analysis
   BitWriter
+  CodeGen
   Core
   IPA
   IPO
diff --git a/llvm/tools/opt/LLVMBuild.txt b/llvm/tools/opt/LLVMBuild.txt
index 77b94469edd..b3589f854ff 100644
--- a/llvm/tools/opt/LLVMBuild.txt
+++ b/llvm/tools/opt/LLVMBuild.txt
@@ -19,4 +19,4 @@
 type = Tool
 name = opt
 parent = Tools
-required_libraries = AsmParser BitReader BitWriter IRReader IPO Instrumentation Scalar ObjCARC all-targets
+required_libraries = AsmParser BitReader BitWriter CodeGen IRReader IPO Instrumentation Scalar ObjCARC all-targets
diff --git a/llvm/tools/opt/Makefile b/llvm/tools/opt/Makefile
index fa2d0145531..cfa9c31cb95 100644
--- a/llvm/tools/opt/Makefile
+++ b/llvm/tools/opt/Makefile
@@ -9,7 +9,7 @@
 
 LEVEL := ../..
 TOOLNAME := opt
-LINK_COMPONENTS := bitreader bitwriter asmparser irreader instrumentation scalaropts objcarcopts ipo vectorize all-targets
+LINK_COMPONENTS := bitreader bitwriter asmparser irreader instrumentation scalaropts objcarcopts ipo vectorize all-targets codegen
 
 # Support plugins.
 NO_DEAD_STRIP := 1
diff --git a/llvm/tools/opt/opt.cpp b/llvm/tools/opt/opt.cpp
index fa9bc678c35..b9d3f9d6d21 100644
--- a/llvm/tools/opt/opt.cpp
+++ b/llvm/tools/opt/opt.cpp
@@ -22,6 +22,7 @@
 #include "llvm/Analysis/RegionPass.h"
 #include "llvm/Bitcode/BitcodeWriterPass.h"
 #include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/InitializePasses.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/IRPrintingPasses.h"
 #include "llvm/IR/LLVMContext.h"
@@ -340,6 +341,9 @@ int main(int argc, char **argv) {
   initializeInstCombine(Registry);
   initializeInstrumentation(Registry);
   initializeTarget(Registry);
+  // For codegen passes, only passes that do IR to IR transformation are
+  // supported. For now, just add CodeGenPrepare.
+  initializeCodeGenPreparePass(Registry);
 
   cl::ParseCommandLineOptions(argc, argv,
     "llvm .bc -> .bc modular optimizer and analysis printer\n");