Third pass at allowing plugins to modify default passes. This time with a tweak so that we don't depend on an uninitialized argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131581 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 162 insertions, 0 deletions

diff --git a/include/llvm/DefaultPasses.h b/include/llvm/DefaultPasses.h
index e69de29..8a87bc5 100644
--- a/include/llvm/DefaultPasses.h
+++ b/include/llvm/DefaultPasses.h
@@ -0,0 +1,162 @@
+//===- llvm/DefaultPasses.h - Default Pass Support code --------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// This file defines the infrastructure for registering the standard pass list.
+// This defines sets of standard optimizations that plugins can modify and
+// front ends can use.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEFAULT_PASS_SUPPORT_H
+#define LLVM_DEFAULT_PASS_SUPPORT_H
+
+namespace llvm {
+
+class PassManagerBase;
+
+/// Unique identifiers for the default standard passes.  The addresses of
+/// these symbols are used to uniquely identify passes from the default list.
+namespace DefaultStandardPasses {
+extern unsigned char AggressiveDCEID;
+extern unsigned char ArgumentPromotionID;
+extern unsigned char BasicAliasAnalysisID;
+extern unsigned char CFGSimplificationID;
+extern unsigned char ConstantMergeID;
+extern unsigned char CorrelatedValuePropagationID;
+extern unsigned char DeadArgEliminationID;
+extern unsigned char DeadStoreEliminationID;
+extern unsigned char DeadTypeEliminationID;
+extern unsigned char EarlyCSEID;
+extern unsigned char FunctionAttrsID;
+extern unsigned char FunctionInliningID;
+extern unsigned char GVNID;
+extern unsigned char GlobalDCEID;
+extern unsigned char GlobalOptimizerID;
+extern unsigned char GlobalsModRefID;
+extern unsigned char IPSCCPID;
+extern unsigned char IndVarSimplifyID;
+extern unsigned char InlinerPlaceholderID;
+extern unsigned char InstructionCombiningID;
+extern unsigned char JumpThreadingID;
+extern unsigned char LICMID;
+extern unsigned char LoopDeletionID;
+extern unsigned char LoopIdiomID;
+extern unsigned char LoopRotateID;
+extern unsigned char LoopUnrollID;
+extern unsigned char LoopUnswitchID;
+extern unsigned char MemCpyOptID;
+extern unsigned char PruneEHID;
+extern unsigned char ReassociateID;
+extern unsigned char SCCPID;
+extern unsigned char ScalarReplAggregatesID;
+extern unsigned char SimplifyLibCallsID;
+extern unsigned char StripDeadPrototypesID;
+extern unsigned char TailCallEliminationID;
+extern unsigned char TypeBasedAliasAnalysisID;
+}
+
+/// StandardPass - The class responsible for maintaining the lists of standard 
+class StandardPass {
+  friend class RegisterStandardPassLists;
+  public:
+  /// Predefined standard sets of passes
+  enum StandardSet {
+    AliasAnalysis,
+    Function,
+    Module,
+    LTO
+  };
+  /// Flags to specify whether a pass should be enabled.  Passes registered
+  /// with the standard sets may specify a minimum optimization level and one
+  /// or more flags that must be set when constructing the set for the pass to
+  /// be used.
+  enum OptimizationFlags {
+    /// Optimize for size was requested.
+    OptimizeSize = 1<<0,
+    /// Allow passes which may make global module changes.
+    UnitAtATime = 1<<1,
+    /// UnrollLoops - Allow loop unrolling.
+    UnrollLoops = 1<<2,
+    /// Allow library calls to be simplified.
+    SimplifyLibCalls = 1<<3,
+    /// Whether the module may have code using exceptions.
+    HaveExceptions = 1<<4,
+    // Run an inliner pass as part of this set.
+    RunInliner = 1<<5
+  };
+  enum OptimizationFlagComponents {
+    /// The low bits are used to store the optimization level.  When requesting
+    /// passes, this should store the requested optimisation level.  When
+    /// setting passes, this should set the minimum optimization level at which
+    /// the pass will run.
+    OptimizationLevelMask=0xf,
+    /// The maximum optimisation level at which the pass is run.
+    MaxOptimizationLevelMask=0xf0,
+    // Flags that must be set
+    RequiredFlagMask=0xff00,
+    // Flags that may not be set.
+    DisallowedFlagMask=0xff0000,
+    MaxOptimizationLevelShift=4,
+    RequiredFlagShift=8,
+    DisallowedFlagShift=16
+  };
+  /// Returns the optimisation level from a set of flags.
+  static unsigned OptimizationLevel(unsigned flags) {
+      return flags & OptimizationLevelMask ; };
+  /// Returns the maximum optimization level for this set of flags
+  static unsigned MaxOptimizationLevel(unsigned flags) {
+      return (flags & MaxOptimizationLevelMask) >> 4; };
+  /// Constructs a set of flags from the specified minimum and maximum
+  /// optimisation level
+  static unsigned OptimzationFlags(unsigned minLevel=0, unsigned maxLevel=0xf,
+      unsigned requiredFlags=0, unsigned disallowedFlags=0) {
+    return ((minLevel & OptimizationLevelMask) |
+            ((maxLevel<<MaxOptimizationLevelShift) & MaxOptimizationLevelMask)
+            | ((requiredFlags<<RequiredFlagShift) & RequiredFlagMask)
+            | ((disallowedFlags<<DisallowedFlagShift) & DisallowedFlagMask)); }
+  /// Returns the flags that must be set for this to match
+  static unsigned RequiredFlags(unsigned flags) {
+      return (flags & RequiredFlagMask) >> RequiredFlagShift; };
+  /// Returns the flags that must not be set for this to match
+  static unsigned DisallowedFlags(unsigned flags) {
+      return (flags & DisallowedFlagMask) >> DisallowedFlagShift; };
+  /// Register a standard pass in the specified set.  If flags is non-zero,
+  /// then the pass will only be returned when the specified flags are set.
+  template<typename passName>
+  class RegisterStandardPass {
+    public:
+    RegisterStandardPass(StandardSet set, unsigned char *runBefore=0,
+        unsigned flags=0, unsigned char *ID=0) {
+      // Use the pass's ID if one is not specified
+      RegisterDefaultPass(PassInfo::NormalCtor_t(callDefaultCtor<passName>),
+               ID ? ID : (unsigned char*)&passName::ID, runBefore, set, flags);
+    };
+  };
+  /// Adds the passes from the specified set to the provided pass manager
+  static void AddPassesFromSet(PassManagerBase *PM,
+                               StandardSet set,
+                               unsigned flags=0,
+                               bool VerifyEach=false,
+                               Pass *inliner=0);
+  private:
+  /// Registers the default passes.  This is set by RegisterStandardPassLists
+  /// and is called lazily.
+  static void (*RegisterDefaultPasses)(void);
+  /// Creates the verifier pass that is inserted when a VerifyEach is passed to
+  /// AddPassesFromSet()
+  static Pass* (*CreateVerifierPass)(void);
+  /// Registers the pass
+  static void RegisterDefaultPass(PassInfo::NormalCtor_t constructor,
+                                  unsigned char *newPass,
+                                  unsigned char *oldPass,
+                                  StandardSet set,
+                                  unsigned flags=0);
+};
+
+} // namespace llvm
+
+#endif