class PassConfigImpl;
+/// Discriminated union of Pass ID types.
+///
+/// The PassConfig API prefers dealing with IDs because they are safer and more
+/// efficient. IDs decouple configuration from instantiation. This way, when a
+/// pass is overriden, it isn't unnecessarily instantiated. It is also unsafe to
+/// refer to a Pass pointer after adding it to a pass manager, which deletes
+/// redundant pass instances.
+///
+/// However, it is convient to directly instantiate target passes with
+/// non-default ctors. These often don't have a registered PassInfo. Rather than
+/// force all target passes to implement the pass registry boilerplate, allow
+/// the PassConfig API to handle either type.
+///
+/// AnalysisID is sadly char*, so PointerIntPair won't work.
+class IdentifyingPassPtr {
+ union {
+ AnalysisID ID;
+ Pass *P;
+ };
+ bool IsInstance;
+public:
+ IdentifyingPassPtr() : P(0), IsInstance(false) {}
+ IdentifyingPassPtr(AnalysisID IDPtr) : ID(IDPtr), IsInstance(false) {}
+ IdentifyingPassPtr(Pass *InstancePtr) : P(InstancePtr), IsInstance(true) {}
+
+ bool isValid() const { return P; }
+ bool isInstance() const { return IsInstance; }
+
+ AnalysisID getID() const {
+ assert(!IsInstance && "Not a Pass ID");
+ return ID;
+ }
+ Pass *getInstance() const {
+ assert(IsInstance && "Not a Pass Instance");
+ return P;
+ }
+};
+
+template <> struct isPodLike<IdentifyingPassPtr> {
+ static const bool value = true;
+};
+
/// Target-Independent Code Generator Pass Configuration Options.
///
/// This is an ImmutablePass solely for the purpose of exposing CodeGen options
/// Allow the target to override a specific pass without overriding the pass
/// pipeline. When passes are added to the standard pipeline at the
/// point where StandardID is expected, add TargetID in its place.
- void substitutePass(AnalysisID StandardID, AnalysisID TargetID);
+ void substitutePass(AnalysisID StandardID, IdentifyingPassPtr TargetID);
/// Insert InsertedPassID pass after TargetPassID pass.
- void insertPass(AnalysisID TargetPassID, AnalysisID InsertedPassID);
+ void insertPass(AnalysisID TargetPassID, IdentifyingPassPtr InsertedPassID);
/// Allow the target to enable a specific standard pass by default.
void enablePass(AnalysisID PassID) { substitutePass(PassID, PassID); }
/// Allow the target to disable a specific standard pass by default.
- void disablePass(AnalysisID PassID) { substitutePass(PassID, 0); }
+ void disablePass(AnalysisID PassID) {
+ substitutePass(PassID, IdentifyingPassPtr());
+ }
/// Return the pass substituted for StandardID by the target.
/// If no substitution exists, return StandardID.
- AnalysisID getPassSubstitution(AnalysisID StandardID) const;
+ IdentifyingPassPtr getPassSubstitution(AnalysisID StandardID) const;
/// Return true if the optimized regalloc pipeline is enabled.
bool getOptimizeRegAlloc() const;
return false;
}
- /// addFinalizeRegAlloc - This method may be implemented by targets that want
- /// to run passes within the regalloc pipeline, immediately after the register
- /// allocation pass itself. These passes run as soon as virtual regisiters
- /// have been rewritten to physical registers but before and other postRA
- /// optimization happens. Targets that have marked instructions for bundling
- /// must have finalized those bundles by the time these passes have run,
- /// because subsequent passes are not guaranteed to be bundle-aware.
- virtual bool addFinalizeRegAlloc() {
- 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
/// This pass implements the target transform info analysis using the target
/// independent information available to the LLVM code generator.
ImmutablePass *
- createBasicTargetTransformInfoPass(const TargetLoweringBase *TLI);
+ createBasicTargetTransformInfoPass(const TargetMachine *TM);
/// createUnreachableBlockEliminationPass - The LLVM code generator does not
/// work well with unreachable basic blocks (what live ranges make sense for a
/// information.
extern char &MachineBlockPlacementStatsID;
- /// Code Placement - This pass optimize code placement and aligns loop
- /// headers to target specific alignment boundary.
- extern char &CodePlacementOptID;
-
/// GCLowering Pass - Performs target-independent LLVM IR transformations for
/// highly portable strategies.
///
/// createStackProtectorPass - This pass adds stack protectors to functions.
///
- FunctionPass *createStackProtectorPass(const TargetLoweringBase *tli);
+ FunctionPass *createStackProtectorPass(const TargetMachine *TM);
/// createMachineVerifierPass - This pass verifies cenerated machine code
/// instructions for correctness.
/// 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);
+ FunctionPass *createDwarfEHPass(const TargetMachine *TM);
/// createSjLjEHPreparePass - This pass adapts exception handling code to use
/// the GCC-style builtin setjmp/longjmp (sjlj) to handling EH control flow.
///
- FunctionPass *createSjLjEHPreparePass(const TargetLoweringBase *tli);
+ FunctionPass *createSjLjEHPreparePass(const TargetMachine *TM);
/// LocalStackSlotAllocation - This pass assigns local frame indices to stack
/// slots relative to one another and allocates base registers to access them