#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/FileWriters.h"
#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/Transforms/Scalar.h"
+#include "llvm/ADT/OwningPtr.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FormattedStream.h"
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("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> PrintEmittedAsm("print-emitted-asm", cl::Hidden,
- cl::desc("Dump emitter generated instructions as assembly"));
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));
+static cl::opt<cl::boolOrDefault>
+AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
+ cl::init(cl::BOU_UNSET));
+
+static bool getVerboseAsm() {
+ switch (AsmVerbose) {
+ default:
+ case cl::BOU_UNSET: return TargetMachine::getAsmVerbosityDefault();
+ case cl::BOU_TRUE: return true;
+ case cl::BOU_FALSE: return false;
+ }
+}
// Enable or disable FastISel. Both options are needed, because
// FastISel is enabled by default with -fast, and we wish to be
static cl::opt<bool> EnableSplitGEPGVN("split-gep-gvn", cl::Hidden,
cl::desc("Split GEPs and run no-load GVN"));
-static cl::opt<bool> PreAllocTailDup("pre-regalloc-taildup", cl::Hidden,
- cl::desc("Pre-register allocation tail duplication"));
-
LLVMTargetMachine::LLVMTargetMachine(const Target &T,
const std::string &TargetTriple)
: TargetMachine(T) {
setCodeModel(CodeModel::Small);
}
-FileModel::Model
-LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
- formatted_raw_ostream &Out,
- CodeGenFileType FileType,
- CodeGenOpt::Level OptLevel) {
+bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
+ formatted_raw_ostream &Out,
+ CodeGenFileType FileType,
+ CodeGenOpt::Level OptLevel) {
// Add common CodeGen passes.
if (addCommonCodeGenPasses(PM, OptLevel))
- return FileModel::Error;
+ return true;
+
+ OwningPtr<MCContext> Context(new MCContext());
+ OwningPtr<MCStreamer> AsmStreamer;
+ formatted_raw_ostream *LegacyOutput;
switch (FileType) {
- default:
+ default: return true;
+ case CGFT_AssemblyFile: {
+ const MCAsmInfo &MAI = *getMCAsmInfo();
+ MCInstPrinter *InstPrinter =
+ getTarget().createMCInstPrinter(MAI.getAssemblerDialect(), MAI, Out);
+ AsmStreamer.reset(createAsmStreamer(*Context, Out, MAI,
+ getTargetData()->isLittleEndian(),
+ getVerboseAsm(), InstPrinter,
+ /*codeemitter*/0));
+ // Set the AsmPrinter's "O" to the output file.
+ LegacyOutput = &Out;
break;
- case TargetMachine::AssemblyFile:
- if (addAssemblyEmitter(PM, OptLevel, getAsmVerbosityDefault(), Out))
- return FileModel::Error;
- return FileModel::AsmFile;
- case TargetMachine::ObjectFile:
- if (!addObjectFileEmitter(PM, OptLevel, Out))
- return FileModel::MachOFile;
- else if (getELFWriterInfo())
- return FileModel::ElfFile;
}
- return FileModel::Error;
-}
-
-bool LLVMTargetMachine::addAssemblyEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- bool Verbose,
- formatted_raw_ostream &Out) {
+ case CGFT_ObjectFile: {
+ // Create the code emitter for the target if it exists. If not, .o file
+ // emission fails.
+ MCCodeEmitter *MCE = getTarget().createCodeEmitter(*this);
+ if (MCE == 0)
+ return true;
+
+ AsmStreamer.reset(createMachOStreamer(*Context, Out, MCE));
+
+ // Any output to the asmprinter's "O" stream is bad and needs to be fixed,
+ // force it to come out stderr.
+ // FIXME: this is horrible and leaks, eventually remove the raw_ostream from
+ // asmprinter.
+ LegacyOutput = new formatted_raw_ostream(errs());
+ break;
+ }
+ case CGFT_Null:
+ // The Null output is intended for use for performance analysis and testing,
+ // not real users.
+ AsmStreamer.reset(createNullStreamer(*Context));
+ // Any output to the asmprinter's "O" stream is bad and needs to be fixed,
+ // force it to come out stderr.
+ // FIXME: this is horrible and leaks, eventually remove the raw_ostream from
+ // asmprinter.
+ LegacyOutput = new formatted_raw_ostream(errs());
+ break;
+ }
+
+ // Create the AsmPrinter, which takes ownership of Context and AsmStreamer
+ // if successful.
FunctionPass *Printer =
- getTarget().createAsmPrinter(Out, *this, getMCAsmInfo(), Verbose);
- if (!Printer)
- return true;
-
- PM.add(Printer);
- return false;
-}
-
-bool LLVMTargetMachine::addObjectFileEmitter(PassManagerBase &PM,
- CodeGenOpt::Level OptLevel,
- formatted_raw_ostream &Out) {
- MCCodeEmitter *Emitter = getTarget().createCodeEmitter(*this);
- if (!Emitter)
+ getTarget().createAsmPrinter(*LegacyOutput, *this, *Context, *AsmStreamer,
+ getMCAsmInfo());
+ if (Printer == 0)
return true;
- PM.add(createMachOWriter(Out, *this, getMCAsmInfo(), Emitter));
- return false;
-}
-
-/// addPassesToEmitFileFinish - If the passes to emit the specified file had to
-/// be split up (e.g., to add an object writer pass), this method can be used to
-/// finish up adding passes to emit the file, if necessary.
-bool LLVMTargetMachine::addPassesToEmitFileFinish(PassManagerBase &PM,
- MachineCodeEmitter *MCE,
- CodeGenOpt::Level OptLevel) {
- // Make sure the code model is set.
- setCodeModelForStatic();
+ // If successful, createAsmPrinter took ownership of AsmStreamer and Context.
+ Context.take(); AsmStreamer.take();
- if (MCE)
- addSimpleCodeEmitter(PM, OptLevel, *MCE);
- if (PrintEmittedAsm)
- addAssemblyEmitter(PM, OptLevel, true, ferrs());
-
- PM.add(createGCInfoDeleter());
-
- return false; // success!
-}
-
-/// addPassesToEmitFileFinish - If the passes to emit the specified file had to
-/// be split up (e.g., to add an object writer pass), this method can be used to
-/// finish up adding passes to emit the file, if necessary.
-bool LLVMTargetMachine::addPassesToEmitFileFinish(PassManagerBase &PM,
- JITCodeEmitter *JCE,
- CodeGenOpt::Level OptLevel) {
- // Make sure the code model is set.
- setCodeModelForJIT();
+ PM.add(Printer);
- if (JCE)
- addSimpleCodeEmitter(PM, OptLevel, *JCE);
- if (PrintEmittedAsm)
- addAssemblyEmitter(PM, OptLevel, true, ferrs());
-
- PM.add(createGCInfoDeleter());
-
- return false; // success!
-}
-
-/// addPassesToEmitFileFinish - If the passes to emit the specified file had to
-/// be split up (e.g., to add an object writer pass), this method can be used to
-/// finish up adding passes to emit the file, if necessary.
-bool LLVMTargetMachine::addPassesToEmitFileFinish(PassManagerBase &PM,
- ObjectCodeEmitter *OCE,
- CodeGenOpt::Level OptLevel) {
// Make sure the code model is set.
setCodeModelForStatic();
-
- if (OCE)
- addSimpleCodeEmitter(PM, OptLevel, *OCE);
- if (PrintEmittedAsm)
- addAssemblyEmitter(PM, OptLevel, true, ferrs());
-
PM.add(createGCInfoDeleter());
-
- return false; // success!
-}
-
-/// 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,
- MachineCodeEmitter &MCE,
- CodeGenOpt::Level OptLevel) {
- // Make sure the code model is set.
- setCodeModelForJIT();
-
- // Add common CodeGen passes.
- if (addCommonCodeGenPasses(PM, OptLevel))
- return true;
-
- addCodeEmitter(PM, OptLevel, MCE);
- if (PrintEmittedAsm)
- addAssemblyEmitter(PM, OptLevel, true, ferrs());
-
- PM.add(createGCInfoDeleter());
-
- return false; // success!
+ return false;
}
/// addPassesToEmitMachineCode - Add passes to the specified pass manager to
-/// get machine code emitted. This uses a MachineCodeEmitter object to handle
+/// get machine code emitted. This uses a JITCodeEmitter 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.
return true;
addCodeEmitter(PM, OptLevel, JCE);
- if (PrintEmittedAsm)
- addAssemblyEmitter(PM, OptLevel, true, ferrs());
-
PM.add(createGCInfoDeleter());
return false; // success!
printAndVerify(PM, "After Instruction Selection",
/* allowDoubleDefs= */ true);
+
+ // Delete dead machine instructions regardless of optimization level.
+ PM.add(createDeadMachineInstructionElimPass());
+ printAndVerify(PM, "After codegen DCE pass",
+ /* allowDoubleDefs= */ true);
+
if (OptLevel != CodeGenOpt::None) {
PM.add(createOptimizeExtsPass());
if (!DisableMachineLICM)
}
// Pre-ra tail duplication.
- if (OptLevel != CodeGenOpt::None &&
- !DisableTailDuplicate && PreAllocTailDup) {
+ if (OptLevel != CodeGenOpt::None && !DisableEarlyTailDup) {
PM.add(createTailDuplicatePass(true));
printAndVerify(PM, "After Pre-RegAlloc TailDuplicate",
/* allowDoubleDefs= */ true);
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