AnalysisID StopAfter;
bool Started;
bool Stopped;
+ bool AddingMachinePasses;
protected:
TargetMachine *TM;
/// Default setting for -enable-tail-merge on this target.
bool EnableTailMerge;
+ /// Default setting for -enable-shrink-wrap on this target.
+ bool EnableShrinkWrap;
+
public:
TargetPassConfig(TargetMachine *tm, PassManagerBase &pm);
// Dummy constructor.
TargetPassConfig();
- virtual ~TargetPassConfig();
+ ~TargetPassConfig() override;
static char ID;
/// Return true if the optimized regalloc pipeline is enabled.
bool getOptimizeRegAlloc() const;
+ /// Return true if shrink wrapping is enabled.
+ bool getEnableShrinkWrap() const;
+
+ /// Return true if the default global register allocator is in use and
+ /// has not be overriden on the command line with '-regalloc=...'
+ bool usingDefaultRegAlloc() const;
+
/// Add common target configurable passes that perform LLVM IR to IR
/// transforms following machine independent optimization.
virtual void addIRPasses();
///
/// This can also be used to plug a new MachineSchedStrategy into an instance
/// of the standard ScheduleDAGMI:
- /// return new ScheduleDAGMI(C, new MyStrategy(C))
+ /// return new ScheduleDAGMI(C, make_unique<MyStrategy>(C), /* IsPostRA= */false)
///
/// Return NULL to select the default (generic) machine scheduler.
virtual ScheduleDAGInstrs *
return false;
}
- /// addPreRegAlloc - This method may be implemented by targets that want to
- /// run passes immediately before register allocation. This should return
- /// true if -print-machineinstrs should print after these passes.
- virtual bool addPreRegAlloc() {
- return false;
- }
+ /// This method may be implemented by targets that want to run passes
+ /// immediately before register allocation.
+ virtual void addPreRegAlloc() { }
/// createTargetRegisterAllocator - Create the register allocator pass for
/// this target at the current optimization level.
return false;
}
- /// addPostRegAlloc - This method may be implemented by targets that want to
- /// run passes after register allocation pass pipeline but before
- /// prolog-epilog insertion. This should return true if -print-machineinstrs
- /// should print after these passes.
- virtual bool addPostRegAlloc() {
- return false;
- }
+ /// This method may be implemented by targets that want to run passes after
+ /// register allocation pass pipeline but before prolog-epilog insertion.
+ virtual void addPostRegAlloc() { }
/// Add passes that optimize machine instructions after register allocation.
virtual void addMachineLateOptimization();
- /// addPreSched2 - This method may be implemented by targets that want to
- /// run passes after prolog-epilog insertion and before the second instruction
- /// scheduling pass. This should return true if -print-machineinstrs should
- /// print after these passes.
- virtual bool addPreSched2() {
- return false;
- }
+ /// This method may be implemented by targets that want to run passes after
+ /// prolog-epilog insertion and before the second instruction scheduling pass.
+ virtual void addPreSched2() { }
/// addGCPasses - Add late codegen passes that analyze code for garbage
/// collection. This should return true if GC info should be printed after
/// Add standard basic block placement passes.
virtual void addBlockPlacement();
- /// addPreEmitPass - This pass may be implemented by targets that want to run
- /// passes immediately before machine code is emitted. This should return
- /// true if -print-machineinstrs should print out the code after the passes.
- virtual bool addPreEmitPass() {
- return false;
- }
+ /// This pass may be implemented by targets that want to run passes
+ /// immediately before machine code is emitted.
+ virtual void addPreEmitPass() { }
/// Utilities for targets to add passes to the pass manager.
///
/// Add a CodeGen pass at this point in the pipeline after checking overrides.
/// Return the pass that was added, or zero if no pass was added.
- AnalysisID addPass(AnalysisID PassID);
+ /// @p printAfter if true and adding a machine function pass add an extra
+ /// machine printer pass afterwards
+ /// @p verifyAfter if true and adding a machine function pass add an extra
+ /// machine verification pass afterwards.
+ AnalysisID addPass(AnalysisID PassID, bool verifyAfter = true,
+ bool printAfter = true);
/// Add a pass to the PassManager if that pass is supposed to be run, as
/// determined by the StartAfter and StopAfter options. Takes ownership of the
/// pass.
- void addPass(Pass *P);
+ /// @p printAfter if true and adding a machine function pass add an extra
+ /// machine printer pass afterwards
+ /// @p verifyAfter if true and adding a machine function pass add an extra
+ /// machine verification pass afterwards.
+ void addPass(Pass *P, bool verifyAfter = true, bool printAfter = true);
/// addMachinePasses helper to create the target-selected or overriden
/// regalloc pass.
/// printAndVerify - Add a pass to dump then verify the machine function, if
/// those steps are enabled.
///
- void printAndVerify(const char *Banner);
+ void printAndVerify(const std::string &Banner);
+
+ /// Add a pass to print the machine function if printing is enabled.
+ void addPrintPass(const std::string &Banner);
+
+ /// Add a pass to perform basic verification of the machine function if
+ /// verification is enabled.
+ void addVerifyPass(const std::string &Banner);
};
} // namespace llvm
/// List of target independent CodeGen pass IDs.
namespace llvm {
- FunctionPass *createAtomicExpandLoadLinkedPass(const TargetMachine *TM);
-
- /// \brief Create a basic TargetTransformInfo analysis pass.
- ///
- /// This pass implements the target transform info analysis using the target
- /// independent information available to the LLVM code generator.
- ImmutablePass *
- createBasicTargetTransformInfoPass(const TargetMachine *TM);
+ FunctionPass *createAtomicExpandPass(const TargetMachine *TM);
/// createUnreachableBlockEliminationPass - The LLVM code generator does not
/// work well with unreachable basic blocks (what live ranges make sense for a
/// matching during instruction selection.
FunctionPass *createCodeGenPreparePass(const TargetMachine *TM = nullptr);
- /// AtomicExpandLoadLinkedID -- FIXME
- extern char &AtomicExpandLoadLinkedID;
+ /// AtomicExpandID -- Lowers atomic operations in terms of either cmpxchg
+ /// load-linked/store-conditional loops.
+ extern char &AtomicExpandID;
/// MachineLoopInfo - This pass is a loop analysis pass.
extern char &MachineLoopInfoID;
/// basic blocks.
extern char &SpillPlacementID;
+ /// ShrinkWrap pass. Look for the best place to insert save and restore
+ // instruction and update the MachineFunctionInfo with that information.
+ extern char &ShrinkWrapID;
+
/// VirtRegRewriter pass. Rewrite virtual registers to physical registers as
/// assigned in VirtRegMap.
extern char &VirtRegRewriterID;
/// inserting cmov instructions.
extern char &EarlyIfConverterID;
+ /// This pass performs instruction combining using trace metrics to estimate
+ /// critical-path and resource depth.
+ extern char &MachineCombinerID;
+
/// StackSlotColoring - This pass performs stack coloring and merging.
/// It merges disjoint allocas to reduce the stack size.
extern char &StackColoringID;
/// information.
extern char &MachineBlockPlacementStatsID;
- /// GCLowering Pass - Performs target-independent LLVM IR transformations for
- /// highly portable strategies.
- ///
+ /// GCLowering Pass - Used by gc.root to perform its default lowering
+ /// operations.
FunctionPass *createGCLoweringPass();
+ /// ShadowStackGCLowering - Implements the custom lowering mechanism
+ /// used by the shadow stack GC. Only runs on functions which opt in to
+ /// the shadow stack collector.
+ FunctionPass *createShadowStackGCLoweringPass();
+
/// GCMachineCodeAnalysis - 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
/// createMachineVerifierPass - This pass verifies cenerated machine code
/// instructions for correctness.
///
- FunctionPass *createMachineVerifierPass(const char *Banner = nullptr);
+ FunctionPass *createMachineVerifierPass(const std::string& Banner);
/// 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);
+ /// createWinEHPass - Prepares personality functions used by MSVC on Windows,
+ /// in addition to the Itanium LSDA based personalities.
+ FunctionPass *createWinEHPass(const TargetMachine *TM);
+
/// createSjLjEHPreparePass - This pass adapts exception handling code to use
/// the GCC-style builtin setjmp/longjmp (sjlj) to handling EH control flow.
///
/// createJumpInstrTables - This pass creates jump-instruction tables.
ModulePass *createJumpInstrTablesPass();
+
+ /// createForwardControlFlowIntegrityPass - This pass adds control-flow
+ /// integrity.
+ ModulePass *createForwardControlFlowIntegrityPass();
} // End llvm namespace
-/// This initializer registers TargetMachine constructor, so the pass being
-/// initialized can use target dependent interfaces. Please do not move this
-/// macro to be together with INITIALIZE_PASS, which is a complete target
-/// independent initializer, and we don't want to make libScalarOpts depend
-/// on libCodeGen.
-#define INITIALIZE_TM_PASS(passName, arg, name, cfg, analysis) \
- static void* initialize##passName##PassOnce(PassRegistry &Registry) { \
+/// Target machine pass initializer for passes with dependencies. Use with
+/// INITIALIZE_TM_PASS_END.
+#define INITIALIZE_TM_PASS_BEGIN INITIALIZE_PASS_BEGIN
+
+/// Target machine pass initializer for passes with dependencies. Use with
+/// INITIALIZE_TM_PASS_BEGIN.
+#define INITIALIZE_TM_PASS_END(passName, arg, name, cfg, analysis) \
PassInfo *PI = new PassInfo(name, arg, & passName ::ID, \
PassInfo::NormalCtor_t(callDefaultCtor< passName >), cfg, analysis, \
PassInfo::TargetMachineCtor_t(callTargetMachineCtor< passName >)); \
CALL_ONCE_INITIALIZATION(initialize##passName##PassOnce) \
}
+/// This initializer registers TargetMachine constructor, so the pass being
+/// initialized can use target dependent interfaces. Please do not move this
+/// macro to be together with INITIALIZE_PASS, which is a complete target
+/// independent initializer, and we don't want to make libScalarOpts depend
+/// on libCodeGen.
+#define INITIALIZE_TM_PASS(passName, arg, name, cfg, analysis) \
+ INITIALIZE_TM_PASS_BEGIN(passName, arg, name, cfg, analysis) \
+ INITIALIZE_TM_PASS_END(passName, arg, name, cfg, analysis)
+
#endif
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