mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
343 lines
12 KiB
C++
343 lines
12 KiB
C++
//===-- Scalar.h - Scalar Transformations -----------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This header file defines prototypes for accessor functions that expose passes
|
|
// in the Scalar transformations library.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_SCALAR_H
|
|
#define LLVM_TRANSFORMS_SCALAR_H
|
|
|
|
namespace llvm {
|
|
|
|
class FunctionPass;
|
|
class Pass;
|
|
class GetElementPtrInst;
|
|
class PassInfo;
|
|
class TerminatorInst;
|
|
class TargetLowering;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// ConstantPropagation - A worklist driven constant propagation pass
|
|
//
|
|
FunctionPass *createConstantPropagationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// SCCP - Sparse conditional constant propagation.
|
|
//
|
|
FunctionPass *createSCCPPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// DeadInstElimination - This pass quickly removes trivially dead instructions
|
|
// without modifying the CFG of the function. It is a BasicBlockPass, so it
|
|
// runs efficiently when queued next to other BasicBlockPass's.
|
|
//
|
|
Pass *createDeadInstEliminationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// DeadCodeElimination - This pass is more powerful than DeadInstElimination,
|
|
// because it is worklist driven that can potentially revisit instructions when
|
|
// their other instructions become dead, to eliminate chains of dead
|
|
// computations.
|
|
//
|
|
FunctionPass *createDeadCodeEliminationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// DeadStoreElimination - This pass deletes stores that are post-dominated by
|
|
// must-aliased stores and are not loaded used between the stores.
|
|
//
|
|
FunctionPass *createDeadStoreEliminationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// AggressiveDCE - This pass uses the SSA based Aggressive DCE algorithm. This
|
|
// algorithm assumes instructions are dead until proven otherwise, which makes
|
|
// it more successful are removing non-obviously dead instructions.
|
|
//
|
|
FunctionPass *createAggressiveDCEPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// ScalarReplAggregates - Break up alloca's of aggregates into multiple allocas
|
|
// if possible.
|
|
//
|
|
FunctionPass *createScalarReplAggregatesPass(signed Threshold = -1);
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// InductionVariableSimplify - Transform induction variables in a program to all
|
|
// use a single canonical induction variable per loop.
|
|
//
|
|
Pass *createIndVarSimplifyPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// InstructionCombining - Combine instructions to form fewer, simple
|
|
// instructions. This pass does not modify the CFG, and has a tendency to make
|
|
// instructions dead, so a subsequent DCE pass is useful.
|
|
//
|
|
// This pass combines things like:
|
|
// %Y = add int 1, %X
|
|
// %Z = add int 1, %Y
|
|
// into:
|
|
// %Z = add int 2, %X
|
|
//
|
|
FunctionPass *createInstructionCombiningPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LICM - This pass is a loop invariant code motion and memory promotion pass.
|
|
//
|
|
Pass *createLICMPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LoopStrengthReduce - This pass is strength reduces GEP instructions that use
|
|
// a loop's canonical induction variable as one of their indices. It takes an
|
|
// optional parameter used to consult the target machine whether certain
|
|
// transformations are profitable.
|
|
//
|
|
Pass *createLoopStrengthReducePass(const TargetLowering *TLI = 0);
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LoopUnswitch - This pass is a simple loop unswitching pass.
|
|
//
|
|
Pass *createLoopUnswitchPass(bool OptimizeForSize = false);
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LoopUnroll - This pass is a simple loop unrolling pass.
|
|
//
|
|
Pass *createLoopUnrollPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LoopRotate - This pass is a simple loop rotating pass.
|
|
//
|
|
Pass *createLoopRotatePass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LoopIndexSplit - This pass divides loop's iteration range by spliting loop
|
|
// such that each individual loop is executed efficiently.
|
|
//
|
|
Pass *createLoopIndexSplitPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// PromoteMemoryToRegister - This pass is used to promote memory references to
|
|
// be register references. A simple example of the transformation performed by
|
|
// this pass is:
|
|
//
|
|
// FROM CODE TO CODE
|
|
// %X = alloca int, uint 1 ret int 42
|
|
// store int 42, int *%X
|
|
// %Y = load int* %X
|
|
// ret int %Y
|
|
//
|
|
FunctionPass *createPromoteMemoryToRegisterPass();
|
|
extern const PassInfo *const PromoteMemoryToRegisterID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// DemoteRegisterToMemoryPass - This pass is used to demote registers to memory
|
|
// references. In basically undoes the PromoteMemoryToRegister pass to make cfg
|
|
// hacking easier.
|
|
//
|
|
FunctionPass *createDemoteRegisterToMemoryPass();
|
|
extern const PassInfo *const DemoteRegisterToMemoryID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Reassociate - This pass reassociates commutative expressions in an order that
|
|
// is designed to promote better constant propagation, GCSE, LICM, PRE...
|
|
//
|
|
// For example: 4 + (x + 5) -> x + (4 + 5)
|
|
//
|
|
FunctionPass *createReassociatePass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// CondPropagationPass - This pass propagates information about conditional
|
|
// expressions through the program, allowing it to eliminate conditional
|
|
// branches in some cases.
|
|
//
|
|
FunctionPass *createCondPropagationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// TailDuplication - Eliminate unconditional branches through controlled code
|
|
// duplication, creating simpler CFG structures.
|
|
//
|
|
FunctionPass *createTailDuplicationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// JumpThreading - Thread control through mult-pred/multi-succ blocks where some
|
|
// preds always go to some succ.
|
|
//
|
|
FunctionPass *createJumpThreadingPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// CFGSimplification - Merge basic blocks, eliminate unreachable blocks,
|
|
// simplify terminator instructions, etc...
|
|
//
|
|
FunctionPass *createCFGSimplificationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// BreakCriticalEdges - Break all of the critical edges in the CFG by inserting
|
|
// a dummy basic block. This pass may be "required" by passes that cannot deal
|
|
// with critical edges. For this usage, a pass must call:
|
|
//
|
|
// AU.addRequiredID(BreakCriticalEdgesID);
|
|
//
|
|
// This pass obviously invalidates the CFG, but can update forward dominator
|
|
// (set, immediate dominators, tree, and frontier) information.
|
|
//
|
|
FunctionPass *createBreakCriticalEdgesPass();
|
|
extern const PassInfo *const BreakCriticalEdgesID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LoopSimplify - Insert Pre-header blocks into the CFG for every function in
|
|
// the module. This pass updates dominator information, loop information, and
|
|
// does not add critical edges to the CFG.
|
|
//
|
|
// AU.addRequiredID(LoopSimplifyID);
|
|
//
|
|
FunctionPass *createLoopSimplifyPass();
|
|
extern const PassInfo *const LoopSimplifyID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LowerAllocations - Turn malloc and free instructions into %malloc and %free
|
|
// calls.
|
|
//
|
|
// AU.addRequiredID(LowerAllocationsID);
|
|
//
|
|
Pass *createLowerAllocationsPass(bool LowerMallocArgToInteger = false);
|
|
extern const PassInfo *const LowerAllocationsID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// TailCallElimination - This pass eliminates call instructions to the current
|
|
// function which occur immediately before return instructions.
|
|
//
|
|
FunctionPass *createTailCallEliminationPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LowerSwitch - This pass converts SwitchInst instructions into a sequence of
|
|
// chained binary branch instructions.
|
|
//
|
|
FunctionPass *createLowerSwitchPass();
|
|
extern const PassInfo *const LowerSwitchID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LowerInvoke - This pass converts invoke and unwind instructions to use sjlj
|
|
// exception handling mechanisms. Note that after this pass runs the CFG is not
|
|
// entirely accurate (exceptional control flow edges are not correct anymore) so
|
|
// only very simple things should be done after the lowerinvoke pass has run
|
|
// (like generation of native code). This should *NOT* be used as a general
|
|
// purpose "my LLVM-to-LLVM pass doesn't support the invoke instruction yet"
|
|
// lowering pass.
|
|
//
|
|
FunctionPass *createLowerInvokePass(const TargetLowering *TLI = 0);
|
|
extern const PassInfo *const LowerInvokePassID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// BlockPlacement - This pass reorders basic blocks in order to increase the
|
|
// number of fall-through conditional branches.
|
|
//
|
|
FunctionPass *createBlockPlacementPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LCSSA - This pass inserts phi nodes at loop boundaries to simplify other loop
|
|
// optimizations.
|
|
//
|
|
Pass *createLCSSAPass();
|
|
extern const PassInfo *const LCSSAID;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// PredicateSimplifier - This pass collapses duplicate variables into one
|
|
// canonical form, and tries to simplify expressions along the way.
|
|
//
|
|
FunctionPass *createPredicateSimplifierPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// GVN-PRE - This pass performs global value numbering and partial redundancy
|
|
// elimination.
|
|
//
|
|
FunctionPass *createGVNPREPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// GVN - This pass performs global value numbering and redundant load
|
|
// elimination cotemporaneously.
|
|
//
|
|
FunctionPass *createGVNPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// MemCpyOpt - This pass performs optimizations related to eliminating memcpy
|
|
// calls and/or combining multiple stores into memset's.
|
|
//
|
|
FunctionPass *createMemCpyOptPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// LoopDeletion - This pass performs DCE of non-infinite loops that it
|
|
// can prove are dead.
|
|
//
|
|
Pass *createLoopDeletionPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
/// createSimplifyLibCallsPass - This pass optimizes specific calls to
|
|
/// specific well-known (library) functions.
|
|
FunctionPass *createSimplifyLibCallsPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
/// createSimplifyHalfPowrLibCallsPass - This is an experimental pass that
|
|
/// optimizes specific half_pow functions.
|
|
FunctionPass *createSimplifyHalfPowrLibCallsPass();
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// CodeGenPrepare - This pass prepares a function for instruction selection.
|
|
//
|
|
FunctionPass *createCodeGenPreparePass(const TargetLowering *TLI = 0);
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// InstructionNamer - Give any unnamed non-void instructions "tmp" names.
|
|
//
|
|
FunctionPass *createInstructionNamerPass();
|
|
extern const PassInfo *const InstructionNamerID;
|
|
|
|
} // End llvm namespace
|
|
|
|
#endif
|