//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/CodeGen/Passes.h"
+#include "llvm/CodeGen/GCStrategy.h"
#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/raw_ostream.h"
using namespace llvm;
-static cl::opt<bool> PrintLSR("print-lsr-output");
-static cl::opt<bool> PrintISelInput("print-isel-input");
+namespace llvm {
+ bool EnableFastISel;
+}
+
+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> 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"));
+
+// Hidden options to help debugging
+static cl::opt<bool>
+EnableSinking("enable-sinking", cl::init(false), cl::Hidden,
+ cl::desc("Perform sinking on machine code"));
+static cl::opt<bool>
+EnableLICM("machine-licm",
+ cl::init(false), cl::Hidden,
+ cl::desc("Perform loop-invariant code motion on machine code"));
+
+// When this works it will be on by default.
+static cl::opt<bool>
+DisablePostRAScheduler("disable-post-RA-scheduler",
+ cl::desc("Disable scheduling after register allocation"),
+ cl::init(true));
+
+// 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 -fast.
+static cl::opt<bool>
+EnableFastISelOption("fast-isel", cl::Hidden,
+ cl::desc("Enable the experimental \"fast\" instruction selector"));
+static cl::opt<bool>
+DisableFastISelOption("disable-fast-isel", cl::Hidden,
+ cl::desc("Disable the experimental \"fast\" instruction selector"));
+
FileModel::Model
-LLVMTargetMachine::addPassesToEmitFile(FunctionPassManager &PM,
- std::ostream &Out,
+LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
+ raw_ostream &Out,
CodeGenFileType FileType,
bool Fast) {
- // Standard LLVM-Level Passes.
-
- // Run loop strength reduction before anything else.
- if (!Fast) {
- PM.add(createLoopStrengthReducePass(getTargetLowering()));
- if (PrintLSR)
- PM.add(new PrintFunctionPass("\n\n*** Code after LSR *** \n", &cerr));
- }
-
- // FIXME: Implement efficient support for garbage collection intrinsics.
- PM.add(createLowerGCPass());
-
- // FIXME: Implement the invoke/unwind instructions!
- if (!ExceptionHandling)
- PM.add(createLowerInvokePass(getTargetLowering()));
-
- // Make sure that no unreachable blocks are instruction selected.
- PM.add(createUnreachableBlockEliminationPass());
-
- if (!Fast)
- PM.add(createCodeGenPreparePass(getTargetLowering()));
-
- if (PrintISelInput)
- PM.add(new PrintFunctionPass("\n\n*** Final LLVM Code input to ISel *** \n",
- &cerr));
-
- // Ask the target for an isel.
- if (addInstSelector(PM, Fast))
+ // Add common CodeGen passes.
+ if (addCommonCodeGenPasses(PM, Fast))
return FileModel::Error;
- // Print the instruction selected machine code...
- if (PrintMachineCode)
- PM.add(createMachineFunctionPrinterPass(cerr));
-
- // Perform register allocation to convert to a concrete x86 representation
- PM.add(createRegisterAllocator());
-
- if (PrintMachineCode)
- PM.add(createMachineFunctionPrinterPass(cerr));
-
- // Run post-ra passes.
- if (addPostRegAlloc(PM, Fast) && PrintMachineCode)
- PM.add(createMachineFunctionPrinterPass(cerr));
-
- // Insert prolog/epilog code. Eliminate abstract frame index references...
- PM.add(createPrologEpilogCodeInserter());
-
- // Branch folding must be run after regalloc and prolog/epilog insertion.
- if (!Fast)
- PM.add(createBranchFoldingPass(DoTailMergeDefault()));
-
// Fold redundant debug labels.
PM.add(createDebugLabelFoldingPass());
-
- if (PrintMachineCode) // Print the register-allocated code
+
+ if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(cerr));
if (addPreEmitPass(PM, Fast) && PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(cerr));
+ if (!Fast)
+ PM.add(createLoopAlignerPass());
+
switch (FileType) {
default:
break;
return FileModel::Error;
}
-
+
/// 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(FunctionPassManager &PM,
+bool LLVMTargetMachine::addPassesToEmitFileFinish(PassManagerBase &PM,
MachineCodeEmitter *MCE,
bool Fast) {
if (MCE)
- addSimpleCodeEmitter(PM, Fast, *MCE);
+ addSimpleCodeEmitter(PM, Fast, PrintEmittedAsm, *MCE);
+
+ PM.add(createGCInfoDeleter());
// Delete machine code for this function
PM.add(createMachineCodeDeleter());
/// of functions. This method should returns true if machine code emission is
/// not supported.
///
-bool LLVMTargetMachine::addPassesToEmitMachineCode(FunctionPassManager &PM,
+bool LLVMTargetMachine::addPassesToEmitMachineCode(PassManagerBase &PM,
MachineCodeEmitter &MCE,
bool Fast) {
+ // Add common CodeGen passes.
+ if (addCommonCodeGenPasses(PM, Fast))
+ return true;
+
+ if (addPreEmitPass(PM, Fast) && PrintMachineCode)
+ PM.add(createMachineFunctionPrinterPass(cerr));
+
+ addCodeEmitter(PM, Fast, PrintEmittedAsm, MCE);
+
+ PM.add(createGCInfoDeleter());
+
+ // Delete machine code for this function
+ PM.add(createMachineCodeDeleter());
+
+ return false; // success!
+}
+
+/// addCommonCodeGenPasses - Add standard LLVM codegen passes used for
+/// both emitting to assembly files or machine code output.
+///
+bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, bool Fast) {
// Standard LLVM-Level Passes.
-
+
// Run loop strength reduction before anything else.
if (!Fast) {
PM.add(createLoopStrengthReducePass(getTargetLowering()));
if (PrintLSR)
- PM.add(new PrintFunctionPass("\n\n*** Code after LSR *** \n", &cerr));
+ PM.add(new PrintFunctionPass("\n\n*** Code after LSR ***\n", &cerr));
}
-
- // FIXME: Implement efficient support for garbage collection intrinsics.
- PM.add(createLowerGCPass());
-
- // FIXME: Implement the invoke/unwind instructions!
- PM.add(createLowerInvokePass(getTargetLowering()));
-
+
+ PM.add(createGCLoweringPass());
+
+ if (!getTargetAsmInfo()->doesSupportExceptionHandling())
+ PM.add(createLowerInvokePass(getTargetLowering()));
+
// Make sure that no unreachable blocks are instruction selected.
PM.add(createUnreachableBlockEliminationPass());
PM.add(createCodeGenPreparePass(getTargetLowering()));
if (PrintISelInput)
- PM.add(new PrintFunctionPass("\n\n*** Final LLVM Code input to ISel *** \n",
+ PM.add(new PrintFunctionPass("\n\n*** Final LLVM Code input to ISel ***\n",
&cerr));
+ // Standard Lower-Level Passes.
+
+ // Enable FastISel with -fast, but allow that to be overridden.
+ assert((!EnableFastISelOption || !DisableFastISelOption) &&
+ "Both -fast-isel and -disable-fast-isel given!");
+ if (EnableFastISelOption ||
+ (Fast && !DisableFastISelOption))
+ EnableFastISel = true;
+
// Ask the target for an isel.
if (addInstSelector(PM, Fast))
return true;
// Print the instruction selected machine code...
if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(cerr));
-
- // Perform register allocation to convert to a concrete x86 representation
+
+ // If we're using Fast-ISel, clean up the mess.
+ if (EnableFastISel)
+ PM.add(createDeadMachineInstructionElimPass());
+
+ if (EnableLICM)
+ PM.add(createMachineLICMPass());
+
+ if (EnableSinking)
+ PM.add(createMachineSinkingPass());
+
+ // Run pre-ra passes.
+ if (addPreRegAlloc(PM, Fast) && PrintMachineCode)
+ PM.add(createMachineFunctionPrinterPass(cerr));
+
+ // Perform register allocation.
PM.add(createRegisterAllocator());
-
- if (PrintMachineCode)
+
+ // Perform stack slot coloring.
+ if (!Fast)
+ PM.add(createStackSlotColoringPass());
+
+ if (PrintMachineCode) // Print the register-allocated code
PM.add(createMachineFunctionPrinterPass(cerr));
// Run post-ra passes.
if (addPostRegAlloc(PM, Fast) && PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(cerr));
+ if (PrintMachineCode)
+ PM.add(createMachineFunctionPrinterPass(cerr));
+
+ PM.add(createLowerSubregsPass());
+
+ if (PrintMachineCode) // Print the subreg lowered code
+ PM.add(createMachineFunctionPrinterPass(cerr));
+
// Insert prolog/epilog code. Eliminate abstract frame index references...
PM.add(createPrologEpilogCodeInserter());
-
- if (PrintMachineCode) // Print the register-allocated code
+
+ if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(cerr));
-
+
+ // Second pass scheduler.
+ if (!Fast && !DisablePostRAScheduler)
+ PM.add(createPostRAScheduler());
+
// Branch folding must be run after regalloc and prolog/epilog insertion.
if (!Fast)
- PM.add(createBranchFoldingPass(DoTailMergeDefault()));
-
- if (addPreEmitPass(PM, Fast) && PrintMachineCode)
+ PM.add(createBranchFoldingPass(getEnableTailMergeDefault()));
+
+ PM.add(createGCMachineCodeAnalysisPass());
+
+ if (PrintMachineCode)
PM.add(createMachineFunctionPrinterPass(cerr));
- addCodeEmitter(PM, Fast, MCE);
-
- // Delete machine code for this function
- PM.add(createMachineCodeDeleter());
-
- return false; // success!
+ if (PrintGCInfo)
+ PM.add(createGCInfoPrinter(*cerr));
+
+ return false;
}
projects / oota-llvm.git / blobdiff