//===-- Passes.h - Target independent code generation passes ----*- C++ -*-===//
-//
+//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group 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.
+//
//===----------------------------------------------------------------------===//
//
// This file defines interfaces to access the target independent code generation
#ifndef LLVM_CODEGEN_PASSES_H
#define LLVM_CODEGEN_PASSES_H
-#include <iosfwd>
+#include "llvm/Target/TargetMachine.h"
#include <string>
namespace llvm {
class FunctionPass;
+ class MachineFunctionPass;
class PassInfo;
- class TargetMachine;
-
+ class TargetLowering;
+ class RegisterCoalescer;
+ class raw_ostream;
+
+ /// createUnreachableBlockEliminationPass - The LLVM code generator does not
+ /// work well with unreachable basic blocks (what live ranges make sense for a
+ /// block that cannot be reached?). As such, a code generator should either
+ /// not instruction select unreachable blocks, or run this pass as its
+ /// last LLVM modifying pass to clean up blocks that are not reachable from
+ /// the entry block.
+ FunctionPass *createUnreachableBlockEliminationPass();
+
/// MachineFunctionPrinter pass - This pass prints out the machine function to
- /// standard error, as a debugging tool.
- FunctionPass *createMachineFunctionPrinterPass(std::ostream *OS,
- const std::string &Banner ="");
+ /// the given stream as a debugging tool.
+ MachineFunctionPass *
+ createMachineFunctionPrinterPass(raw_ostream &OS,
+ const std::string &Banner ="");
+
+ /// MachineLoopInfo pass - This pass is a loop analysis pass.
+ ///
+ extern char &MachineLoopInfoID;
+
+ /// MachineLoopRanges pass - This pass is an on-demand loop coverage
+ /// analysis pass.
+ ///
+ extern char &MachineLoopRangesID;
+
+ /// MachineDominators pass - This pass is a machine dominators analysis pass.
+ ///
+ extern char &MachineDominatorsID;
+
+ /// EdgeBundles analysis - Bundle machine CFG edges.
+ ///
+ extern char &EdgeBundlesID;
/// PHIElimination pass - This pass eliminates machine instruction PHI nodes
/// by inserting copy instructions. This destroys SSA information, but is the
/// desired input for some register allocators. This pass is "required" by
/// these register allocator like this: AU.addRequiredID(PHIEliminationID);
///
- extern const PassInfo *PHIEliminationID;
+ extern char &PHIEliminationID;
+
+ /// StrongPHIElimination pass - This pass eliminates machine instruction PHI
+ /// nodes by inserting copy instructions. This destroys SSA information, but
+ /// is the desired input for some register allocators. This pass is
+ /// "required" by these register allocator like this:
+ /// AU.addRequiredID(PHIEliminationID);
+ /// This pass is still in development
+ extern char &StrongPHIEliminationID;
+
+ extern char &PreAllocSplittingID;
+
+ /// LiveStacks pass. An analysis keeping track of the liveness of stack slots.
+ extern char &LiveStacksID;
+
+ /// SimpleRegisterCoalescing pass. Aggressively coalesces every register
+ /// copy it can.
+ ///
+ extern char &SimpleRegisterCoalescingID;
/// TwoAddressInstruction pass - This pass reduces two-address instructions to
/// use two operands. This destroys SSA information but it is desired by
/// register allocators.
- extern const PassInfo *TwoAddressInstructionPassID;
+ extern char &TwoAddressInstructionPassID;
+
+ /// SpillPlacement analysis. Suggest optimal placement of spill code between
+ /// basic blocks.
+ ///
+ extern char &SpillPlacementID;
+
+ /// UnreachableMachineBlockElimination pass - This pass removes unreachable
+ /// machine basic blocks.
+ extern char &UnreachableMachineBlockElimID;
+
+ /// DeadMachineInstructionElim pass - This pass removes dead machine
+ /// instructions.
+ ///
+ FunctionPass *createDeadMachineInstructionElimPass();
+
+ /// Creates a register allocator as the user specified on the command line, or
+ /// picks one that matches OptLevel.
+ ///
+ FunctionPass *createRegisterAllocator(CodeGenOpt::Level OptLevel);
- /// Creates a register allocator as the user specified on the command line.
+ /// FastRegisterAllocation Pass - This pass register allocates as fast as
+ /// possible. It is best suited for debug code where live ranges are short.
///
- FunctionPass *createRegisterAllocator();
+ FunctionPass *createFastRegisterAllocator();
- /// SimpleRegisterAllocation Pass - This pass converts the input machine code
- /// from SSA form to use explicit registers by spilling every register. Wow,
- /// great policy huh?
+ /// BasicRegisterAllocation Pass - This pass implements a degenerate global
+ /// register allocator using the basic regalloc framework.
///
- FunctionPass *createSimpleRegisterAllocator();
+ FunctionPass *createBasicRegisterAllocator();
+
+ /// Greedy register allocation pass - This pass implements a global register
+ /// allocator for optimized builds.
+ ///
+ FunctionPass *createGreedyRegisterAllocator();
- /// LocalRegisterAllocation Pass - This pass register allocates the input code
- /// a basic block at a time, yielding code better than the simple register
- /// allocator, but not as good as a global allocator.
- ///
- FunctionPass *createLocalRegisterAllocator();
-
/// LinearScanRegisterAllocation Pass - This pass implements the linear scan
/// register allocation algorithm, a global register allocator.
///
FunctionPass *createLinearScanRegisterAllocator();
+ /// PBQPRegisterAllocation Pass - This pass implements the Partitioned Boolean
+ /// Quadratic Prograaming (PBQP) based register allocator.
+ ///
+ FunctionPass *createDefaultPBQPRegisterAllocator();
+
+ /// SimpleRegisterCoalescing Pass - Coalesce all copies possible. Can run
+ /// independently of the register allocator.
+ ///
+ RegisterCoalescer *createSimpleRegisterCoalescer();
+
/// PrologEpilogCodeInserter Pass - This pass inserts prolog and epilog code,
/// and eliminates abstract frame references.
///
FunctionPass *createPrologEpilogCodeInserter();
- /// MachineCodeDeletion Pass - This pass deletes all of the machine code for
- /// the current function, which should happen after the function has been
- /// emitted to a .s file or to memory.
- FunctionPass *createMachineCodeDeleter();
-
- /// getRegisterAllocator - This creates an instance of the register allocator
- /// for the Sparc.
- FunctionPass *getRegisterAllocator(TargetMachine &T);
-
- //createModuloSchedulingPass - Creates the Swing Modulo Scheduling Pass
- FunctionPass *createModuloSchedulingPass(TargetMachine & targ);
+ /// LowerSubregs Pass - This pass lowers subregs to register-register copies
+ /// which yields suboptimal, but correct code if the register allocator
+ /// cannot coalesce all subreg operations during allocation.
+ ///
+ FunctionPass *createLowerSubregsPass();
+
+ /// createPostRAScheduler - This pass performs post register allocation
+ /// scheduling.
+ FunctionPass *createPostRAScheduler(CodeGenOpt::Level OptLevel);
+
+ /// BranchFolding Pass - This pass performs machine code CFG based
+ /// optimizations to delete branches to branches, eliminate branches to
+ /// successor blocks (creating fall throughs), and eliminating branches over
+ /// branches.
+ FunctionPass *createBranchFoldingPass(bool DefaultEnableTailMerge);
+
+ /// TailDuplicate Pass - Duplicate blocks with unconditional branches
+ /// into tails of their predecessors.
+ FunctionPass *createTailDuplicatePass(bool PreRegAlloc = false);
+
+ /// IfConverter Pass - This pass performs machine code if conversion.
+ FunctionPass *createIfConverterPass();
+
+ /// Code Placement Pass - This pass optimize code placement and aligns loop
+ /// headers to target specific alignment boundary.
+ FunctionPass *createCodePlacementOptPass();
+
+ /// IntrinsicLowering Pass - Performs target-independent LLVM IR
+ /// transformations for highly portable strategies.
+ FunctionPass *createGCLoweringPass();
+
+ /// MachineCodeAnalysis Pass - Target-independent pass to mark safe points in
+ /// machine code. Must be added very late during code generation, just prior
+ /// to output, and importantly after all CFG transformations (such as branch
+ /// folding).
+ FunctionPass *createGCMachineCodeAnalysisPass();
+
+ /// Deleter Pass - Releases GC metadata.
+ ///
+ FunctionPass *createGCInfoDeleter();
+
+ /// Creates a pass to print GC metadata.
+ ///
+ FunctionPass *createGCInfoPrinter(raw_ostream &OS);
+
+ /// createMachineCSEPass - This pass performs global CSE on machine
+ /// instructions.
+ FunctionPass *createMachineCSEPass();
+
+ /// createMachineLICMPass - This pass performs LICM on machine instructions.
+ ///
+ FunctionPass *createMachineLICMPass(bool PreRegAlloc = true);
+
+ /// createMachineSinkingPass - This pass performs sinking on machine
+ /// instructions.
+ FunctionPass *createMachineSinkingPass();
+
+ /// createPeepholeOptimizerPass - This pass performs peephole optimizations -
+ /// like extension and comparison eliminations.
+ FunctionPass *createPeepholeOptimizerPass();
+
+ /// createOptimizePHIsPass - This pass optimizes machine instruction PHIs
+ /// to take advantage of opportunities created during DAG legalization.
+ FunctionPass *createOptimizePHIsPass();
+
+ /// createStackSlotColoringPass - This pass performs stack slot coloring.
+ FunctionPass *createStackSlotColoringPass(bool);
+
+ /// createStackProtectorPass - This pass adds stack protectors to functions.
+ FunctionPass *createStackProtectorPass(const TargetLowering *tli);
+
+ /// createMachineVerifierPass - This pass verifies cenerated machine code
+ /// instructions for correctness.
+ FunctionPass *createMachineVerifierPass(const char *Banner = 0);
+
+ /// createDwarfEHPass - This pass mulches exception handling code into a form
+ /// adapted to code generation. Required if using dwarf exception handling.
+ FunctionPass *createDwarfEHPass(const TargetMachine *tm);
+
+ /// createSjLjEHPass - This pass adapts exception handling code to use
+ /// the GCC-style builtin setjmp/longjmp (sjlj) to handling EH control flow.
+ FunctionPass *createSjLjEHPass(const TargetLowering *tli);
+
+ /// createLocalStackSlotAllocationPass - This pass assigns local frame
+ /// indices to stack slots relative to one another and allocates
+ /// base registers to access them when it is estimated by the target to
+ /// be out of range of normal frame pointer or stack pointer index
+ /// addressing.
+ FunctionPass *createLocalStackSlotAllocationPass();
+
+ /// createExpandISelPseudosPass - This pass expands pseudo-instructions.
+ ///
+ FunctionPass *createExpandISelPseudosPass();
} // End llvm namespace
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