Added TargetPassConfig. The first little step toward configuring codegen passes.

Allows command line overrides to be centralized in LLVMTargetMachine.cpp.
LLVMTargetMachine can intercept common passes and give precedence to command line overrides.
Allows adding "internal" target configuration options without touching TargetOptions.
Encapsulates the PassManager.
Provides a good point to initialize all CodeGen passes so that Pass ID's can be used in APIs.
Allows modifying the target configuration hooks without rebuilding the world.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149672 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 50 insertions, 44 deletions

diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 3a9f0f0..34bf77b 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -125,13 +125,21 @@ LLVMTargetMachine::LLVMTargetMachine(const Target &T, StringRef Triple,
          "and that InitializeAllTargetMCs() is being invoked!");
 }
 
+/// createPassConfig - Create a pass configuration object to be used by
+/// addPassToEmitX methods for generating a pipeline of CodeGen passes.
+TargetPassConfig *LLVMTargetMachine::createPassConfig(PassManagerBase &PM,
+                                                      bool DisableVerify) {
+  return new TargetPassConfig(this, PM, DisableVerify);
+}
+
 bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
                                             formatted_raw_ostream &Out,
                                             CodeGenFileType FileType,
                                             bool DisableVerify) {
   // Add common CodeGen passes.
   MCContext *Context = 0;
-  if (addCommonCodeGenPasses(PM, DisableVerify, Context))
+  OwningPtr<TargetPassConfig> PassConfig(createPassConfig(PM, DisableVerify));
+  if (PassConfig->addCodeGenPasses(Context))
     return true;
   assert(Context != 0 && "Failed to get MCContext");
 
@@ -215,7 +223,8 @@ bool LLVMTargetMachine::addPassesToEmitMachineCode(PassManagerBase &PM,
                                                    bool DisableVerify) {
   // Add common CodeGen passes.
   MCContext *Ctx = 0;
-  if (addCommonCodeGenPasses(PM, DisableVerify, Ctx))
+  OwningPtr<TargetPassConfig> PassConfig(createPassConfig(PM, DisableVerify));
+  if (PassConfig->addCodeGenPasses(Ctx))
     return true;
 
   addCodeEmitter(PM, JCE);
@@ -234,7 +243,8 @@ bool LLVMTargetMachine::addPassesToEmitMC(PassManagerBase &PM,
                                           raw_ostream &Out,
                                           bool DisableVerify) {
   // Add common CodeGen passes.
-  if (addCommonCodeGenPasses(PM, DisableVerify, Ctx))
+  OwningPtr<TargetPassConfig> PassConfig(createPassConfig(PM, DisableVerify));
+  if (PassConfig->addCodeGenPasses(Ctx))
     return true;
 
   if (hasMCSaveTempLabels())
@@ -268,27 +278,23 @@ bool LLVMTargetMachine::addPassesToEmitMC(PassManagerBase &PM,
   return false; // success!
 }
 
-void LLVMTargetMachine::printNoVerify(PassManagerBase &PM,
-                                      const char *Banner) const {
-  if (Options.PrintMachineCode)
+void TargetPassConfig::printNoVerify(const char *Banner) const {
+  if (TM->shouldPrintMachineCode())
     PM.add(createMachineFunctionPrinterPass(dbgs(), Banner));
 }
 
-void LLVMTargetMachine::printAndVerify(PassManagerBase &PM,
-                                       const char *Banner) const {
-  if (Options.PrintMachineCode)
+void TargetPassConfig::printAndVerify(const char *Banner) const {
+  if (TM->shouldPrintMachineCode())
     PM.add(createMachineFunctionPrinterPass(dbgs(), Banner));
 
   if (VerifyMachineCode)
     PM.add(createMachineVerifierPass(Banner));
 }
 
-/// addCommonCodeGenPasses - Add standard LLVM codegen passes used for both
+/// addCodeGenPasses - Add standard LLVM codegen passes used for both
 /// emitting to assembly files or machine code output.
 ///
-bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
-                                               bool DisableVerify,
-                                               MCContext *&OutContext) {
+bool TargetPassConfig::addCodeGenPasses(MCContext *&OutContext) {
   // Standard LLVM-Level Passes.
 
   // Basic AliasAnalysis support.
@@ -317,7 +323,7 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
 
   // Turn exception handling constructs into something the code generators can
   // handle.
-  switch (getMCAsmInfo()->getExceptionHandlingType()) {
+  switch (TM->getMCAsmInfo()->getExceptionHandlingType()) {
   case ExceptionHandling::SjLj:
     // SjLj piggy-backs on dwarf for this bit. The cleanups done apply to both
     // Dwarf EH prepare needs to be run after SjLj prepare. Otherwise,
@@ -330,7 +336,7 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
   case ExceptionHandling::DwarfCFI:
   case ExceptionHandling::ARM:
   case ExceptionHandling::Win64:
-    PM.add(createDwarfEHPass(this));
+    PM.add(createDwarfEHPass(TM));
     break;
   case ExceptionHandling::None:
     PM.add(createLowerInvokePass(getTargetLowering()));
@@ -345,7 +351,7 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
 
   PM.add(createStackProtectorPass(getTargetLowering()));
 
-  addPreISel(PM);
+  addPreISel();
 
   if (PrintISelInput)
     PM.add(createPrintFunctionPass("\n\n"
@@ -362,26 +368,26 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
   // Install a MachineModuleInfo class, which is an immutable pass that holds
   // all the per-module stuff we're generating, including MCContext.
   MachineModuleInfo *MMI =
-    new MachineModuleInfo(*getMCAsmInfo(), *getRegisterInfo(),
+    new MachineModuleInfo(*TM->getMCAsmInfo(), *TM->getRegisterInfo(),
                           &getTargetLowering()->getObjFileLowering());
   PM.add(MMI);
   OutContext = &MMI->getContext(); // Return the MCContext specifically by-ref.
 
   // Set up a MachineFunction for the rest of CodeGen to work on.
-  PM.add(new MachineFunctionAnalysis(*this));
+  PM.add(new MachineFunctionAnalysis(*TM));
 
   // Enable FastISel with -fast, but allow that to be overridden.
   if (EnableFastISelOption == cl::BOU_TRUE ||
       (getOptLevel() == CodeGenOpt::None &&
        EnableFastISelOption != cl::BOU_FALSE))
-    Options.EnableFastISel = true;
+    TM->setFastISel(true);
 
   // Ask the target for an isel.
-  if (addInstSelector(PM))
+  if (addInstSelector())
     return true;
 
   // Print the instruction selected machine code...
-  printAndVerify(PM, "After Instruction Selection");
+  printAndVerify("After Instruction Selection");
 
   // Expand pseudo-instructions emitted by ISel.
   PM.add(createExpandISelPseudosPass());
@@ -389,7 +395,7 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
   // Pre-ra tail duplication.
   if (getOptLevel() != CodeGenOpt::None && !DisableEarlyTailDup) {
     PM.add(createTailDuplicatePass(true));
-    printAndVerify(PM, "After Pre-RegAlloc TailDuplicate");
+    printAndVerify("After Pre-RegAlloc TailDuplicate");
   }
 
   // Optimize PHIs before DCE: removing dead PHI cycles may make more
@@ -408,7 +414,7 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
     // arguments directly (see t11 in test/CodeGen/X86/sibcall.ll).
     if (!DisableMachineDCE)
       PM.add(createDeadMachineInstructionElimPass());
-    printAndVerify(PM, "After codegen DCE pass");
+    printAndVerify("After codegen DCE pass");
 
     if (!DisableMachineLICM)
       PM.add(createMachineLICMPass());
@@ -416,19 +422,19 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
       PM.add(createMachineCSEPass());
     if (!DisableMachineSink)
       PM.add(createMachineSinkingPass());
-    printAndVerify(PM, "After Machine LICM, CSE and Sinking passes");
+    printAndVerify("After Machine LICM, CSE and Sinking passes");
 
     PM.add(createPeepholeOptimizerPass());
-    printAndVerify(PM, "After codegen peephole optimization pass");
+    printAndVerify("After codegen peephole optimization pass");
   }
 
   // Run pre-ra passes.
-  if (addPreRegAlloc(PM))
-    printAndVerify(PM, "After PreRegAlloc passes");
+  if (addPreRegAlloc())
+    printAndVerify("After PreRegAlloc passes");
 
   // Perform register allocation.
   PM.add(createRegisterAllocator(getOptLevel()));
-  printAndVerify(PM, "After Register Allocation");
+  printAndVerify("After Register Allocation");
 
   // Perform stack slot coloring and post-ra machine LICM.
   if (getOptLevel() != CodeGenOpt::None) {
@@ -441,47 +447,47 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
     if (!DisablePostRAMachineLICM)
       PM.add(createMachineLICMPass(false));
 
-    printAndVerify(PM, "After StackSlotColoring and postra Machine LICM");
+    printAndVerify("After StackSlotColoring and postra Machine LICM");
   }
 
   // Run post-ra passes.
-  if (addPostRegAlloc(PM))
-    printAndVerify(PM, "After PostRegAlloc passes");
+  if (addPostRegAlloc())
+    printAndVerify("After PostRegAlloc passes");
 
   // Insert prolog/epilog code.  Eliminate abstract frame index references...
   PM.add(createPrologEpilogCodeInserter());
-  printAndVerify(PM, "After PrologEpilogCodeInserter");
+  printAndVerify("After PrologEpilogCodeInserter");
 
   // Branch folding must be run after regalloc and prolog/epilog insertion.
   if (getOptLevel() != CodeGenOpt::None && !DisableBranchFold) {
     PM.add(createBranchFoldingPass(getEnableTailMergeDefault()));
-    printNoVerify(PM, "After BranchFolding");
+    printNoVerify("After BranchFolding");
   }
 
   // Tail duplication.
   if (getOptLevel() != CodeGenOpt::None && !DisableTailDuplicate) {
     PM.add(createTailDuplicatePass(false));
-    printNoVerify(PM, "After TailDuplicate");
+    printNoVerify("After TailDuplicate");
   }
 
   // Copy propagation.
   if (getOptLevel() != CodeGenOpt::None && !DisableCopyProp) {
     PM.add(createMachineCopyPropagationPass());
-    printNoVerify(PM, "After copy propagation pass");
+    printNoVerify("After copy propagation pass");
   }
 
   // Expand pseudo instructions before second scheduling pass.
   PM.add(createExpandPostRAPseudosPass());
-  printNoVerify(PM, "After ExpandPostRAPseudos");
+  printNoVerify("After ExpandPostRAPseudos");
 
   // Run pre-sched2 passes.
-  if (addPreSched2(PM))
-    printNoVerify(PM, "After PreSched2 passes");
+  if (addPreSched2())
+    printNoVerify("After PreSched2 passes");
 
   // Second pass scheduler.
   if (getOptLevel() != CodeGenOpt::None && !DisablePostRA) {
     PM.add(createPostRAScheduler(getOptLevel()));
-    printNoVerify(PM, "After PostRAScheduler");
+    printNoVerify("After PostRAScheduler");
   }
 
   PM.add(createGCMachineCodeAnalysisPass());
@@ -495,21 +501,21 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
       // default currently. Eventually it should subsume CodePlacementOpt, so
       // when enabled, the other is disabled.
       PM.add(createMachineBlockPlacementPass());
-      printNoVerify(PM, "After MachineBlockPlacement");
+      printNoVerify("After MachineBlockPlacement");
     } else {
       PM.add(createCodePlacementOptPass());
-      printNoVerify(PM, "After CodePlacementOpt");
+      printNoVerify("After CodePlacementOpt");
     }
 
     // Run a separate pass to collect block placement statistics.
     if (EnableBlockPlacementStats) {
       PM.add(createMachineBlockPlacementStatsPass());
-      printNoVerify(PM, "After MachineBlockPlacementStats");
+      printNoVerify("After MachineBlockPlacementStats");
     }
   }
 
-  if (addPreEmitPass(PM))
-    printNoVerify(PM, "After PreEmit passes");
+  if (addPreEmitPass())
+    printNoVerify("After PreEmit passes");
 
   return false;
 }