//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetMachine.h"
-#include "llvm/PassManager.h"
-#include "llvm/Pass.h"
-#include "llvm/Assembly/PrintModulePass.h"
+
+#include "llvm/Analysis/Passes.h"
#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/FileWriters.h"
-#include "llvm/CodeGen/GCStrategy.h"
+#include "llvm/CodeGen/JumpInstrTables.h"
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
-#include "llvm/Target/TargetOptions.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/IR/IRPrintingPasses.h"
+#include "llvm/IR/Verifier.h"
#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/Target/TargetRegistry.h"
-#include "llvm/Transforms/Scalar.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
+#include "llvm/Transforms/Scalar.h"
using namespace llvm;
-namespace llvm {
- bool EnableFastISel;
-}
-
-static cl::opt<bool> DisablePostRA("disable-post-ra", cl::Hidden,
- cl::desc("Disable Post Regalloc"));
-static cl::opt<bool> DisableBranchFold("disable-branch-fold", cl::Hidden,
- cl::desc("Disable branch folding"));
-static cl::opt<bool> DisableTailDuplicate("disable-tail-duplicate", cl::Hidden,
- cl::desc("Disable tail duplication"));
-static cl::opt<bool> DisableEarlyTailDup("disable-early-taildup", cl::Hidden,
- cl::desc("Disable pre-register allocation tail duplication"));
-static cl::opt<bool> DisableCodePlace("disable-code-place", cl::Hidden,
- cl::desc("Disable code placement"));
-static cl::opt<bool> DisableSSC("disable-ssc", cl::Hidden,
- cl::desc("Disable Stack Slot Coloring"));
-static cl::opt<bool> DisableMachineLICM("disable-machine-licm", cl::Hidden,
- cl::desc("Disable Machine LICM"));
-static cl::opt<bool> DisableMachineSink("disable-machine-sink", cl::Hidden,
- cl::desc("Disable Machine Sinking"));
-static cl::opt<bool> DisableLSR("disable-lsr", cl::Hidden,
- cl::desc("Disable Loop Strength Reduction Pass"));
-static cl::opt<bool> DisableCGP("disable-cgp", cl::Hidden,
- cl::desc("Disable Codegen Prepare"));
-static cl::opt<bool> PrintLSR("print-lsr-output", cl::Hidden,
- cl::desc("Print LLVM IR produced by the loop-reduce pass"));
-static cl::opt<bool> PrintISelInput("print-isel-input", cl::Hidden,
- cl::desc("Print LLVM IR input to isel pass"));
-static cl::opt<bool> PrintGCInfo("print-gc", cl::Hidden,
- cl::desc("Dump garbage collector data"));
-static cl::opt<bool> VerifyMachineCode("verify-machineinstrs", cl::Hidden,
- cl::desc("Verify generated machine code"),
- cl::init(getenv("LLVM_VERIFY_MACHINEINSTRS")!=NULL));
-
-
// Enable or disable FastISel. Both options are needed, because
// FastISel is enabled by default with -fast, and we wish to be
// able to enable or disable fast-isel independently from -O0.
EnableFastISelOption("fast-isel", cl::Hidden,
cl::desc("Enable the \"fast\" instruction selector"));
-// Enable or disable an experimental optimization to split GEPs
-// and run a special GVN pass which does not examine loads, in
-// an effort to factor out redundancy implicit in complex GEPs.
-static cl::opt<bool> EnableSplitGEPGVN("split-gep-gvn", cl::Hidden,
- cl::desc("Split GEPs and run no-load GVN"));
+void LLVMTargetMachine::initAsmInfo() {
+ MCAsmInfo *TmpAsmInfo = TheTarget.createMCAsmInfo(
+ *getSubtargetImpl()->getRegisterInfo(), getTargetTriple());
+ // TargetSelect.h moved to a different directory between LLVM 2.9 and 3.0,
+ // and if the old one gets included then MCAsmInfo will be NULL and
+ // we'll crash later.
+ // Provide the user with a useful error message about what's wrong.
+ assert(TmpAsmInfo && "MCAsmInfo not initialized. "
+ "Make sure you include the correct TargetSelect.h"
+ "and that InitializeAllTargetMCs() is being invoked!");
-LLVMTargetMachine::LLVMTargetMachine(const Target &T,
- const std::string &TargetTriple)
- : TargetMachine(T) {
- AsmInfo = T.createAsmInfo(TargetTriple);
-}
+ if (Options.DisableIntegratedAS)
+ TmpAsmInfo->setUseIntegratedAssembler(false);
-// Set the default code model for the JIT for a generic target.
-// FIXME: Is small right here? or .is64Bit() ? Large : Small?
-void
-LLVMTargetMachine::setCodeModelForJIT() {
- setCodeModel(CodeModel::Small);
-}
+ if (Options.CompressDebugSections)
+ TmpAsmInfo->setCompressDebugSections(true);
-// Set the default code model for static compilation for a generic target.
-void
-LLVMTargetMachine::setCodeModelForStatic() {
- setCodeModel(CodeModel::Small);
+ AsmInfo = TmpAsmInfo;
}
-TargetMachine::CodeGenFileType
-LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
- formatted_raw_ostream &Out,
- CodeGenFileType FileType,
- CodeGenOpt::Level OptLevel) {
- // Add common CodeGen passes.
- if (addCommonCodeGenPasses(PM, OptLevel))
- return CGFT_ErrorOccurred;
-
- switch (FileType) {
- default:
- case CGFT_ObjectFile:
- return CGFT_ErrorOccurred;
- case CGFT_AssemblyFile: {
- FunctionPass *Printer =
- getTarget().createAsmPrinter(Out, *this, getMCAsmInfo(),
- getAsmVerbosityDefault());
- if (Printer == 0) return CGFT_ErrorOccurred;
- PM.add(Printer);
- break;
- }
- }
-
- // Make sure the code model is set.
- setCodeModelForStatic();
- PM.add(createGCInfoDeleter());
- return FileType;
+LLVMTargetMachine::LLVMTargetMachine(const Target &T, StringRef Triple,
+ StringRef CPU, StringRef FS,
+ TargetOptions Options,
+ Reloc::Model RM, CodeModel::Model CM,
+ CodeGenOpt::Level OL)
+ : TargetMachine(T, Triple, CPU, FS, Options) {
+ CodeGenInfo = T.createMCCodeGenInfo(Triple, RM, CM, OL);
}
-/// addPassesToEmitMachineCode - Add passes to the specified pass manager to
-/// get machine code emitted. This uses a MachineCodeEmitter object to handle
-/// actually outputting the machine code and resolving things like the address
-/// of functions. This method should returns true if machine code emission is
-/// not supported.
-///
-bool LLVMTargetMachine::addPassesToEmitMachineCode(PassManagerBase &PM,
- JITCodeEmitter &JCE,
- CodeGenOpt::Level OptLevel) {
- // Make sure the code model is set.
- setCodeModelForJIT();
-
- // Add common CodeGen passes.
- if (addCommonCodeGenPasses(PM, OptLevel))
- return true;
-
- addCodeEmitter(PM, OptLevel, JCE);
- PM.add(createGCInfoDeleter());
-
- return false; // success!
+void LLVMTargetMachine::addAnalysisPasses(PassManagerBase &PM) {
+ PM.add(createBasicTargetTransformInfoPass(this));
}
-static void printAndVerify(PassManagerBase &PM,
- const char *Banner,
- bool allowDoubleDefs = false) {
- if (PrintMachineCode)
- PM.add(createMachineFunctionPrinterPass(dbgs(), Banner));
-
- if (VerifyMachineCode)
- PM.add(createMachineVerifierPass(allowDoubleDefs));
-}
+/// addPassesToX helper drives creation and initialization of TargetPassConfig.
+static MCContext *addPassesToGenerateCode(LLVMTargetMachine *TM,
+ PassManagerBase &PM,
+ bool DisableVerify,
+ AnalysisID StartAfter,
+ AnalysisID StopAfter) {
-/// addCommonCodeGenPasses - Add standard LLVM codegen passes used for both
-/// emitting to assembly files or machine code output.
-///
-bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel) {
- // Standard LLVM-Level Passes.
-
- // Optionally, tun split-GEPs and no-load GVN.
- if (EnableSplitGEPGVN) {
- PM.add(createGEPSplitterPass());
- PM.add(createGVNPass(/*NoPRE=*/false, /*NoLoads=*/true));
- }
+ // Add internal analysis passes from the target machine.
+ TM->addAnalysisPasses(PM);
- // Run loop strength reduction before anything else.
- if (OptLevel != CodeGenOpt::None && !DisableLSR) {
- PM.add(createLoopStrengthReducePass(getTargetLowering()));
- if (PrintLSR)
- PM.add(createPrintFunctionPass("\n\n*** Code after LSR ***\n", &dbgs()));
- }
+ // Targets may override createPassConfig to provide a target-specific
+ // subclass.
+ TargetPassConfig *PassConfig = TM->createPassConfig(PM);
+ PassConfig->setStartStopPasses(StartAfter, StopAfter);
- // Turn exception handling constructs into something the code generators can
- // handle.
- switch (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,
- // catch info can get misplaced when a selector ends up more than one block
- // removed from the parent invoke(s). This could happen when a landing
- // pad is shared by multiple invokes and is also a target of a normal
- // edge from elsewhere.
- PM.add(createSjLjEHPass(getTargetLowering()));
- PM.add(createDwarfEHPass(getTargetLowering(), OptLevel==CodeGenOpt::None));
- break;
- case ExceptionHandling::Dwarf:
- PM.add(createDwarfEHPass(getTargetLowering(), OptLevel==CodeGenOpt::None));
- break;
- case ExceptionHandling::None:
- PM.add(createLowerInvokePass(getTargetLowering()));
- break;
- }
+ // Set PassConfig options provided by TargetMachine.
+ PassConfig->setDisableVerify(DisableVerify);
- PM.add(createGCLoweringPass());
+ PM.add(PassConfig);
- // Make sure that no unreachable blocks are instruction selected.
- PM.add(createUnreachableBlockEliminationPass());
+ PassConfig->addIRPasses();
- if (OptLevel != CodeGenOpt::None && !DisableCGP)
- PM.add(createCodeGenPreparePass(getTargetLowering()));
+ PassConfig->addCodeGenPrepare();
- PM.add(createStackProtectorPass(getTargetLowering()));
+ PassConfig->addPassesToHandleExceptions();
- if (PrintISelInput)
- PM.add(createPrintFunctionPass("\n\n"
- "*** Final LLVM Code input to ISel ***\n",
- &dbgs()));
+ PassConfig->addISelPrepare();
- // Standard Lower-Level Passes.
+ // 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(
+ *TM->getMCAsmInfo(), *TM->getSubtargetImpl()->getRegisterInfo(),
+ &TM->getSubtargetImpl()->getTargetLowering()->getObjFileLowering());
+ PM.add(MMI);
// Set up a MachineFunction for the rest of CodeGen to work on.
- PM.add(new MachineFunctionAnalysis(*this, OptLevel));
+ PM.add(new MachineFunctionAnalysis(*TM));
// Enable FastISel with -fast, but allow that to be overridden.
if (EnableFastISelOption == cl::BOU_TRUE ||
- (OptLevel == CodeGenOpt::None && EnableFastISelOption != cl::BOU_FALSE))
- EnableFastISel = true;
+ (TM->getOptLevel() == CodeGenOpt::None &&
+ EnableFastISelOption != cl::BOU_FALSE))
+ TM->setFastISel(true);
// Ask the target for an isel.
- if (addInstSelector(PM, OptLevel))
+ if (PassConfig->addInstSelector())
+ return nullptr;
+
+ PassConfig->addMachinePasses();
+
+ PassConfig->setInitialized();
+
+ return &MMI->getContext();
+}
+
+bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
+ formatted_raw_ostream &Out,
+ CodeGenFileType FileType,
+ bool DisableVerify,
+ AnalysisID StartAfter,
+ AnalysisID StopAfter) {
+ // Passes to handle jumptable function annotations. These can't be handled at
+ // JIT time, so we don't add them directly to addPassesToGenerateCode.
+ PM.add(createJumpInstrTableInfoPass());
+ PM.add(createJumpInstrTablesPass(Options.JTType));
+
+ // Add common CodeGen passes.
+ MCContext *Context = addPassesToGenerateCode(this, PM, DisableVerify,
+ StartAfter, StopAfter);
+ if (!Context)
return true;
- // Print the instruction selected machine code...
- printAndVerify(PM, "After Instruction Selection",
- /* allowDoubleDefs= */ true);
-
- if (OptLevel != CodeGenOpt::None) {
- PM.add(createOptimizeExtsPass());
- if (!DisableMachineLICM)
- PM.add(createMachineLICMPass());
- if (!DisableMachineSink)
- PM.add(createMachineSinkingPass());
- printAndVerify(PM, "After MachineLICM and MachineSinking",
- /* allowDoubleDefs= */ true);
+ if (StopAfter) {
+ // FIXME: The intent is that this should eventually write out a YAML file,
+ // containing the LLVM IR, the machine-level IR (when stopping after a
+ // machine-level pass), and whatever other information is needed to
+ // deserialize the code and resume compilation. For now, just write the
+ // LLVM IR.
+ PM.add(createPrintModulePass(Out));
+ return false;
}
- // Pre-ra tail duplication.
- if (OptLevel != CodeGenOpt::None && !DisableEarlyTailDup) {
- PM.add(createTailDuplicatePass(true));
- printAndVerify(PM, "After Pre-RegAlloc TailDuplicate",
- /* allowDoubleDefs= */ true);
- }
+ if (Options.MCOptions.MCSaveTempLabels)
+ Context->setAllowTemporaryLabels(false);
- // Run pre-ra passes.
- if (addPreRegAlloc(PM, OptLevel))
- printAndVerify(PM, "After PreRegAlloc passes",
- /* allowDoubleDefs= */ true);
-
- // Perform register allocation.
- PM.add(createRegisterAllocator());
- printAndVerify(PM, "After Register Allocation");
-
- // Perform stack slot coloring.
- if (OptLevel != CodeGenOpt::None && !DisableSSC) {
- // FIXME: Re-enable coloring with register when it's capable of adding
- // kill markers.
- PM.add(createStackSlotColoringPass(false));
- printAndVerify(PM, "After StackSlotColoring");
- }
+ const MCSubtargetInfo &STI = getSubtarget<MCSubtargetInfo>();
+ const MCAsmInfo &MAI = *getMCAsmInfo();
+ const MCRegisterInfo &MRI = *getSubtargetImpl()->getRegisterInfo();
+ const MCInstrInfo &MII = *getSubtargetImpl()->getInstrInfo();
+ std::unique_ptr<MCStreamer> AsmStreamer;
- // Run post-ra passes.
- if (addPostRegAlloc(PM, OptLevel))
- printAndVerify(PM, "After PostRegAlloc passes");
+ switch (FileType) {
+ case CGFT_AssemblyFile: {
+ MCInstPrinter *InstPrinter =
+ getTarget().createMCInstPrinter(MAI.getAssemblerDialect(), MAI,
+ MII, MRI, STI);
+
+ // Create a code emitter if asked to show the encoding.
+ MCCodeEmitter *MCE = nullptr;
+ if (Options.MCOptions.ShowMCEncoding)
+ MCE = getTarget().createMCCodeEmitter(MII, MRI, STI, *Context);
+
+ MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
+ TargetCPU);
+ MCStreamer *S = getTarget().createAsmStreamer(
+ *Context, Out, Options.MCOptions.AsmVerbose,
+ Options.MCOptions.MCUseDwarfDirectory, InstPrinter, MCE, MAB,
+ Options.MCOptions.ShowMCInst);
+ AsmStreamer.reset(S);
+ break;
+ }
+ case CGFT_ObjectFile: {
+ // Create the code emitter for the target if it exists. If not, .o file
+ // emission fails.
+ MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(MII, MRI, STI,
+ *Context);
+ MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
+ TargetCPU);
+ if (!MCE || !MAB)
+ return true;
+
+ AsmStreamer.reset(
+ getTarget()
+ .createMCObjectStreamer(getTargetTriple(), *Context, *MAB, Out, MCE,
+ STI, Options.MCOptions.MCRelaxAll));
+ break;
+ }
+ case CGFT_Null:
+ // The Null output is intended for use for performance analysis and testing,
+ // not real users.
+ AsmStreamer.reset(getTarget().createNullStreamer(*Context));
+ break;
+ }
- PM.add(createLowerSubregsPass());
- printAndVerify(PM, "After LowerSubregs");
+ // Create the AsmPrinter, which takes ownership of AsmStreamer if successful.
+ FunctionPass *Printer = getTarget().createAsmPrinter(*this, *AsmStreamer);
+ if (!Printer)
+ return true;
- // Insert prolog/epilog code. Eliminate abstract frame index references...
- PM.add(createPrologEpilogCodeInserter());
- printAndVerify(PM, "After PrologEpilogCodeInserter");
+ // If successful, createAsmPrinter took ownership of AsmStreamer.
+ AsmStreamer.release();
- // Run pre-sched2 passes.
- if (addPreSched2(PM, OptLevel))
- printAndVerify(PM, "After PreSched2 passes");
+ PM.add(Printer);
- // Second pass scheduler.
- if (OptLevel != CodeGenOpt::None && !DisablePostRA) {
- PM.add(createPostRAScheduler(OptLevel));
- printAndVerify(PM, "After PostRAScheduler");
- }
+ return false;
+}
- // Branch folding must be run after regalloc and prolog/epilog insertion.
- if (OptLevel != CodeGenOpt::None && !DisableBranchFold) {
- PM.add(createBranchFoldingPass(getEnableTailMergeDefault()));
- printAndVerify(PM, "After BranchFolding");
- }
+/// addPassesToEmitMC - Add passes to the specified pass manager to get
+/// machine code emitted with the MCJIT. This method returns true if machine
+/// code is not supported. It fills the MCContext Ctx pointer which can be
+/// used to build custom MCStreamer.
+///
+bool LLVMTargetMachine::addPassesToEmitMC(PassManagerBase &PM,
+ MCContext *&Ctx,
+ raw_ostream &Out,
+ bool DisableVerify) {
+ // Add common CodeGen passes.
+ Ctx = addPassesToGenerateCode(this, PM, DisableVerify, nullptr, nullptr);
+ if (!Ctx)
+ return true;
- // Tail duplication.
- if (OptLevel != CodeGenOpt::None && !DisableTailDuplicate) {
- PM.add(createTailDuplicatePass(false));
- printAndVerify(PM, "After TailDuplicate");
- }
+ if (Options.MCOptions.MCSaveTempLabels)
+ Ctx->setAllowTemporaryLabels(false);
+
+ // Create the code emitter for the target if it exists. If not, .o file
+ // emission fails.
+ const MCRegisterInfo &MRI = *getSubtargetImpl()->getRegisterInfo();
+ const MCSubtargetInfo &STI = getSubtarget<MCSubtargetInfo>();
+ MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(
+ *getSubtargetImpl()->getInstrInfo(), MRI, STI, *Ctx);
+ MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
+ TargetCPU);
+ if (!MCE || !MAB)
+ return true;
- PM.add(createGCMachineCodeAnalysisPass());
+ std::unique_ptr<MCStreamer> AsmStreamer;
+ AsmStreamer.reset(getTarget()
+ .createMCObjectStreamer(getTargetTriple(), *Ctx, *MAB,
+ Out, MCE, STI,
+ Options.MCOptions.MCRelaxAll));
- if (PrintGCInfo)
- PM.add(createGCInfoPrinter(dbgs()));
+ // Create the AsmPrinter, which takes ownership of AsmStreamer if successful.
+ FunctionPass *Printer = getTarget().createAsmPrinter(*this, *AsmStreamer);
+ if (!Printer)
+ return true;
- if (OptLevel != CodeGenOpt::None && !DisableCodePlace) {
- PM.add(createCodePlacementOptPass());
- printAndVerify(PM, "After CodePlacementOpt");
- }
+ // If successful, createAsmPrinter took ownership of AsmStreamer.
+ AsmStreamer.release();
- if (addPreEmitPass(PM, OptLevel))
- printAndVerify(PM, "After PreEmit passes");
+ PM.add(Printer);
- return false;
+ return false; // success!
}
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