#ifndef LLVM_CODEGEN_PASSES_H
#define LLVM_CODEGEN_PASSES_H
+#include "llvm/Pass.h"
#include "llvm/Target/TargetMachine.h"
#include <string>
class TargetLowering;
class TargetRegisterClass;
class raw_ostream;
+}
+namespace llvm {
+
+/// Target-Independent Code Generator Pass Configuration Options.
+///
+/// This is an ImmutablePass solely for the purpose of exposing CodeGen options
+/// to the internals of other CodeGen passes.
+class TargetPassConfig : public ImmutablePass {
+protected:
+ TargetMachine *TM;
+ PassManagerBase &PM;
+ bool Initialized; // Flagged after all passes are configured.
+
+ // Target Pass Options
+ // Targets provide a default setting, user flags override.
+ //
+ bool DisableVerify;
+
+ /// Default setting for -enable-tail-merge on this target.
+ bool EnableTailMerge;
+
+public:
+ TargetPassConfig(TargetMachine *tm, PassManagerBase &pm);
+ // Dummy constructor.
+ TargetPassConfig();
+
+ virtual ~TargetPassConfig();
+
+ static char ID;
+
+ /// Get the right type of TargetMachine for this target.
+ template<typename TMC> TMC &getTM() const {
+ return *static_cast<TMC*>(TM);
+ }
+
+ const TargetLowering *getTargetLowering() const {
+ return TM->getTargetLowering();
+ }
+
+ void setInitialized() { Initialized = true; }
+
+ CodeGenOpt::Level getOptLevel() const { return TM->getOptLevel(); }
+
+ void setDisableVerify(bool Disable) { setOpt(DisableVerify, Disable); }
+
+ bool getEnableTailMerge() const { return EnableTailMerge; }
+ void setEnableTailMerge(bool Enable) { setOpt(EnableTailMerge, Enable); }
+
+ /// Add common target configurable passes that perform LLVM IR to IR
+ /// transforms following machine independent optimization.
+ virtual void addIRPasses();
+
+ /// Add common passes that perform LLVM IR to IR transforms in preparation for
+ /// instruction selection.
+ virtual void addISelPrepare();
+
+ /// addInstSelector - This method should install an instruction selector pass,
+ /// which converts from LLVM code to machine instructions.
+ virtual bool addInstSelector() {
+ return true;
+ }
+
+ /// Add the complete, standard set of LLVM CodeGen passes.
+ /// Fully developed targets will not generally override this.
+ virtual void addMachinePasses();
+protected:
+ // Helper to verify the analysis is really immutable.
+ void setOpt(bool &Opt, bool Val);
+
+ /// Methods with trivial inline returns are convenient points in the common
+ /// codegen pass pipeline where targets may insert passes. Methods with
+ /// out-of-line standard implementations are major CodeGen stages called by
+ /// addMachinePasses. Some targets may override major stages when inserting
+ /// passes is insufficient, but maintaining overriden stages is more work.
+ ///
+
+ /// addPreISelPasses - This method should add any "last minute" LLVM->LLVM
+ /// passes (which are run just before instruction selector).
+ virtual bool addPreISel() {
+ return true;
+ }
+
+ /// 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;
+ }
+
+ /// addPostRegAlloc - This method may be implemented by targets that want
+ /// to run passes after register allocation but before prolog-epilog
+ /// insertion. This should return true if -print-machineinstrs should print
+ /// after these passes.
+ virtual bool addPostRegAlloc() {
+ return false;
+ }
+
+ /// 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;
+ }
+
+ /// 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;
+ }
+
+ /// Utilities for targets to add passes to the pass manager.
+ ///
+
+ /// Add a target-independent CodeGen pass at this point in the pipeline.
+ void addPass(char &ID);
+
+ /// printNoVerify - Add a pass to dump the machine function, if debugging is
+ /// enabled.
+ ///
+ void printNoVerify(const char *Banner) const;
+
+ /// printAndVerify - Add a pass to dump then verify the machine function, if
+ /// those steps are enabled.
+ ///
+ void printAndVerify(const char *Banner) const;
+};
+} // namespace llvm
+
+/// List of target independent CodeGen pass IDs.
+namespace llvm {
/// 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
/// RegisteCoalescer pass - This pass merges live ranges to eliminate copies.
extern char &RegisterCoalescerPassID;
+ /// MachineScheduler pass - This pass schedules machine instructions.
+ extern char &MachineSchedulerID;
+
/// SpillPlacement analysis. Suggest optimal placement of spill code between
/// basic blocks.
///
/// createPostRAScheduler - This pass performs post register allocation
/// scheduling.
- FunctionPass *createPostRAScheduler(CodeGenOpt::Level OptLevel);
+ FunctionPass *createPostRAScheduler();
/// 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);
+ extern char &BranchFolderPassID;
/// TailDuplicate Pass - Duplicate blocks with unconditional branches
/// into tails of their predecessors.
- FunctionPass *createTailDuplicatePass(bool PreRegAlloc = false);
+ FunctionPass *createTailDuplicatePass();
/// IfConverter Pass - This pass performs machine code if conversion.
FunctionPass *createIfConverterPass();
FunctionPass *createOptimizePHIsPass();
/// createStackSlotColoringPass - This pass performs stack slot coloring.
- FunctionPass *createStackSlotColoringPass(bool);
+ FunctionPass *createStackSlotColoringPass();
/// createStackProtectorPass - This pass adds stack protectors to functions.
FunctionPass *createStackProtectorPass(const TargetLowering *tli);
///
FunctionPass *createUnpackMachineBundlesPass();
+ /// createFinalizeMachineBundles - This pass finalize machine instruction
+ /// bundles (created earlier, e.g. during pre-RA scheduling).
+ ///
+ FunctionPass *createFinalizeMachineBundlesPass();
+
} // End llvm namespace
#endif
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